Justin looked so happy doing the sponsored segment. I know he’s been around a little bit now but it’s so nice seeing Justin become comfortable on camera and becoming an amazing host. It’s like he’s been doing it forever he’s become a natural.
Yeah I remember when he first started out he was so awkward and looked kinda nervous, but I'm glad he's start to get more comfortable and open. I feel like the energy and just friendship of all the guys at Donut is just infectious as FUCK. It's great to see the chemistry between everyone and it makes me smile that Justin is getting along well. Also, fucking PORSCHE sponsored this video? Damn that's cool
@@leakybandz1208 I love seeing him just make cameos in Zach and Jeremiah's show about testing tools. They're all sciencey and smart and they'll just call Justin over to break stuff 🤣
The fact that you guys partnered with Porsche to offer this kind of program is incredible. Hats off to whoever came up with this idea. Sky is the limit all around!
Well, they've been sponsored by Porsche before when Nolan talked about the Cayenne in one of his Wheelhouse episodes. That sponsored bit was talking about their pre-owned Porsche program.
That's the sign of a good tech. I love when I'm doing heavy line work and let a customer know hey you need this or I am going to go ahead and take care of this while I'm in here. If I have to take things apart around a serviceable item to get where I need to whats the cost of a few minutes to take care of it.
Paul definitely seems like the kind of guy that if you're a customer, you want him watching over the shop because he will make sure things are done right, and if you're his employee you'd better have your game together because he will put you out on your ass in a heartbeat if you screw around.
I was wondering about the differences in their approaches why she was so much stricter and going after the ideal everytime. While the others were much more practical and focused on the reality. I didn't even think about the fact that she is an instructor and they are practicing technicians.
@Aaron Burkeen it would most likely be due to the way the automotive instructor has to teach. The main certification all automotive instructors are trained for is the ASE certification test, the instructor knows that test to a tee they change their couses to meet that tests standards. Though with it being a test it is hard to test real world situations so many times the ASE exam is a lot more strict as the automotive instructor is
@Taylor Smith I'm a tech and I think it's worth it. I get to see so many cool things that most mechanics don't get to, and attend porsche specific technical training courses. There are lots of extra hoops to jump through, and lots of attention to detail which is expected.
@@taylorsmith3031 Of course its worth working at a Porsche dealer, those guys charge you Ferrari/Lamborghini repair prices, even if they did absolutely nothing. Your salary will be amazing.
I’ve done the rear brake delete trick. I’ve also been pushed by the rear wheel drive through an intersection with my front only brakes locked in the rain. Almost lost my life that day. After that I just put it in neutral before I got to the light. Made it home safely to change my shorts.
No it's not, they've had Porsche sponsor before. Also dodge and other brands. This is nothing new or big. Also not much of a sponsorship when it's just Porsche getting free advertising for kids to go to a school they can't actually go to
@@talonmcmanus88 hahahah false. Stop acting like you work for the business kid. Fucking pathetic. Facts prove they didn't. Just like how 70% of "sponsherships" don't pay anything. Also sponsherships are usually less then $2,000 which is jack shit. I wouldn't be suprised if you're just like the hundreds of other imbeciles in the comments that don't understand how the platform works, and are soo desperately trying to defend and protect a company that has no care for your existence in the first place
@@brucebonner3491 You have to be the most outspoken and arrogant person I've ever seen who simultaneously knows absolutely nothing. Where did you pull those statistics from, and why do you think that applies to Donut Media? If you think a channel with 7.5 million subscribers shoots an advertisement and includes it at the beginning of their video without pay you have to be taking the piss
No one ever does this, but I just wanna shout out @Porsche for sponsoring this video and proactively seeking out people in this audience that might have the interest and the aptitude to join their business. Well done @Porsche.
Sandro? yeah dude got like old school Fast Furious vibe going on with him and I love it, he's laconic but somehow fits with Donut Media. Tried looking up Miranda's Shop on youtube but got nothing tho
Idk who needs to or will see this but Paul and Lextech are such a good shop! I know this isnt a review page but they fr deserve the recognition. I brought my ‘16 Civic to them thinking I had an issue w my alternator and they originally told me me it was the alternator, but Paul personally came up to me saying it wasn’t the alternator as it began to charge when different buttons were being pressed. He recommended me to a shop that specializes in Hondas to have them check it out. Paul saved me from a $700+ bill! Definitely recommend them for basic check ups and toyota/lexus maintenance! 10/10!!
Lots of laughs. Hope there's more videos like this! "Class 8" mechanic here since the late 80s. Some of the tricks I know people argue and can't believe until they try it or you do it in front of them and prove it. Example: Heating a bearing in an oven so it slides right on a shaft instead of wrestling with it on a press.
the hack at 6:30 is horrible and insanely dangerous. These cans of flammable stuff are usually pressurized with either an inert gas on another propellant gas of some sort. Repressurizing it with an oxidizer creates a literal bomb. if so much as a tiny bit of flame gets to the spray and it catches fire, the fire will flash back through the valve and near instantly burn up the fuel/oxidizer mix inside the can creating an explosion that would likely blow your hand clean off and the shrapnel wouldnt be good for anything in a 10 meter radius either.
As a mechanical engineer, I think we should look more into the dimple concept. I don't think it will have huge increase in power, but I'm curious to know what will happen. Technically the dimples should reduce drag.
Agreed. You see dimpling on some high performance cars' underbelly panels. They wouldn't bother if the effect were unmeasurable. The dimpling also increases the internal volume of the intake runner, which may or may not be beneficial. A good calibrated flow bench might give you some data, but you'd really have to do the test on an engine dynamometer to prove the hypothesis. In any case, I doubt it's really worth the effort if you were trying to get significant gains.
Small engine companies like Sthil already do it. Although it's an inverse dimple. It should aid in cutting low pressure areas and also (my guess) aids in cooling effects in carbureted engines. Port injection too for that matter.
The way I understood it air has less resistance against air, instead of air against a metal surface..... Have seen some pro's porting that left a rougher surface instead of polishing. Claiming these exact results
I was thinking the same thing. Dimpling breaks up laminar flow, which sticks to the smooth surface, creating a low pressure film. This low pressure film slows the air flow for a distance away from the surface, depending on air speed. The dimples create little vortices, with the direction of rotation going in the same direction as the air flow. This stops the laminar flow and the associated air flow reduction. Think of it as fluid ball bearings. The dimple diameters and depths need to be calculated based on pressure and flow rate so their effect does not go into the desired airflow area. Creating random dimples may or may not help performance. Automotive maufacturers don't do this as it's very time consuming to machine, thus increasing the part cost. The performance gain might not be enough to create a sale, especially if a larger diameter pipe could fit in the same location.
they produce turbulence and break air molecule to the max, more the molecule is broke tinner is the air .thecnicaly you can get more air plus it get the intake bigger. porting guys know theyre shit. some set up are better polish other dimple like that .
You gotta be really careful refilling cans like that. They're designed to be disposable so they're not reinforced enough to be repressurized safely and walls or valves can easily fail.
I mean, most folks at home are pushing 90-125psi, but that's probably high for the can. Gentle bursts highly recommended, dont try to fill it til she blows for sure
@@kjur18 Don't be daft. 90psi is 90psi. Doesn't matter if it's air, water, butane or anything. The only reason the air tank for a compressor might need to be extra thick, is that you'll end up with condensation inside the tank, which will rust it out. So the walls of the tank need to be thick enough to survive some corrosion. After a few years the tank may need to be replaced due to internal corrosion. OR, use a dryer on the compressor outlet.
@@noxious89123 Well, yeah. But keep in mind that whatever gas they use in spray cans is in liquid form at that pressure, so it's more efficient as a propellant. To turn air into liquid you need much more pressure. As Wiki says on Canned Air: "True liquid air is not practical, as it cannot be stored in metal spray cans due to extreme pressure and temperature requirements. Common duster gases include hydrocarbon alkanes, like butane, propane, and isobutane, and fluorocarbons like 1,1-difluoroethane, 1,1,1-trifluoroethane, or 1,1,1,2-tetrafluoroethane which are used because of their lower flammability. "
Not only that, but spray cans are not filled with pressurized air. It's a refrigerant that becomes a liquid at a relatively low pressure. In the same way that liquid water can only get so hot before it boils, the refrigerants can only get a little pressure build up before they condense.
The reason why a golf ball is dimpled is to cause the airflow to leave the surface more easily on the lee/downstream side. It's a known aerodynamic effect, where an object that's a bit too blunt at its rear is better to have the flow separated a bit earlier, where the object is larger, than to have the airflow continue further around the rear of the object, because the resultant eddies would cause more drag than forcing the flow to separate early. A golf ball is essentially spherical, which is aerodynamically poor, and it can be oriented at any angle, so it's dimpled all over to ensure that the flow leaves it reasonably quickly at all times. There was a Russian fighter jet in the cold war that had similar dimpling near the back to make the airflow leave the fuselage and reduce drag. For whatever reason, the aircraft had to be short, which made the rear section cut inward more tightly than ideal, so dimpling was added to get better airflow separation and reduce drag. However, if it were possible to make the fuselage longer and more sleek, that would've worked even better. For what looked like an intake runner that was steadily curved, this dimpling is completely unnecessary because the flow is trapped and it has to change direction through its largely constant cross-section. The dimpling would only be beneficial where the intake tract opens up, and only on the lee-side of a bulge, but the idea for the intake is to angle the flow so it goes through the intake valve(s) nearly perpendicular to the valve stem, so the only place where there might, in theory, be any benefit is just inside the combustion chamber (dimpling there would be bad for valve sealing and combustion deposits, so that's a no-go zone), or if the port can't be opened up enough at the valve guide(s), on the lee-side of that. However, better intake geometry would work considerably better. In the intake runner, where there's a constant cross-section, dimpling won't help because it will cause turbulent flow. Through that area, it's better to make the surface smooth.
Brought a triumph head to a machine shop that mostly did race motors. Did a port and polish job myself that i was quite proud of, he told me the exhaust ports were perfect but the intake sides benefited from being a little textured, his explanation was you wanted to create turbulence when the air/gas entered the chamber for a more complete burn.
I have heard this as well. I was into dirtbike/4 wheeler racing 2 decades ago and when we had a port and polish the intake side of things created turbulence (spiral grooves usually) to mix air/fuel better for combustion, and the exhaust side was smooth as glass. Now I am going to research to see if that was all bullshit.
I like that Angelina was the dissenting voice in many of the iffy hacks because she knew there were better ways to do the things they were doing and therefore it wasn't a hack. She really knew her shit and I've the assignment.
She's the one I would go to for regular maintenance and repair work, the other two I would go to for an undiagnosable/irregular repair. Nothing to do with who is better, simply that strange issues sometimes require strange solutions that probably aren't standard but fix the problem. But I'd trust her to follow manufacturers procedure and have the right tools to do the cleanest most professional job.
@@CheeryRhymes The guys id trust to get a beater going from point a to point b, but I wouldn't let them anywhere near a new car. The fact is that some people will (either subconsciously or consciously) think that it's okay if they do something jank or outright dangerous with their vehicle, because they don't care if they get hurt. They never think about if someone else gets hurt. Look at the idiots that had that "show car" on the road and rear ended a minivan with family in it. The only brakes that worked were the front ones and they got cooked in seconds. They didn't care and almost killed children over it.
I love these videos. As a mechanic of 15 years I can say Paul is a G and knows his shit. The girl is a little too by the book sometimes and it makes sense since she's an instructor.
I was just thinking, as someone who knows next to nothing about cars, if I had to pick my mechanic to fix my car out of all these, it would probably be Paul or Angelina based solely off my impression from watching the video.
As a mechanic in the making as soon as I saw they said no to the misfire diag I thought it was a good hack but I also only did this with distributor systems
No matter the trade, an instructor teachers you the rules. At work the good experienced guys teach you what exactly the rules do and why, they also know why the rules change when things get modded etc and what the new rules are.
By the book is sometimes harder, but ensures the job is done correctly. I've taken plenty of shortcuts that have worked, but could have led to other problems if they didn't. I think being cautious of stuff like that is fair. The dude drilling out the bushing, for example, could definitely have scraped the inside and maybe it will eventually not sit in correctly.
I'm surprised more dealerships/brands haven't done ads like Porsche in this video. I feel like this is the perfect audience to have good conversion on ads like this.
I had an old Ford Ranger on the Carolina coast years ago… the brake line rusted out and I was spraying brake fluid down the highway till there was nothing left. I made it to the exit, the manual transmission made it possible to control the speed a bit, found the leak and was able to cut it to pinch it off. I was young and saved the day… Just one of those golden memories. 😊
About the crossed-wires jumpstart part... I once made this mistake because my friend's car had the red positive cap installed on the negative lead and vice-versa, and I took that as good enough info. Luckily, it started smoking at the terminal almost immediately so we pulled it and no damage was done, but ALWAYS check for the embossed "+" and "-" on the plastic of the battery, and don't trust that the black and red caps are installed correctly!
Same thing happened to me. I was helping a friend, and my glasses prescription was so bad I couldn't see the +/- marks (it was a VW Golf and the battery is way back by the windshield). I think I turned green when I realized what happened. I was terrified I'd wrecked her car.
I've also seen newer cars that don't have red for positive, it's just black for both. If you can't see the + and - on the battery, you've then gotta follow the cables to try and figure out which one is ground.
I think the overall takeaway from these videos is that TikTok and other social media can be a really good way to share car knowledge, but it's only really useful as a source if you *already know what you're doing* well enough to tell which advice to throw away. I think everyone in this video learned something new, but it was always a new application of knowledge they already had, and they knew what was trash because it was obvious from their experience.
Almost no one working in a shop is a "technician". I spent a decade working as both an auto mechanic and tractor trailer diesel mechanic. 90 percent of people working in a shop have little to no training or education in mechanics or engineering. They just started somewhere and got some hands on training along the way, which means that you have a ton of people working in shops that have almost no idea what they're doing with electrical, engines, transmissions, transfer cases, or anything else more complex than changing tires or oil. They're too proud to ever tell anyone that they've had very little experience with any particular type job so they fumble through it until they get lucky. Just because they have their ase doesn't mean that they know anything either, because they've dumbed down the ase test to the point that pretty much anyone that's ever seen a car one time could go take it and pass. That's all well and good if you get the 50 year old plus mechanic that's had time to learn from all his mistakes, but that's not the norm. Even though I really don't have the time most of the time, I still do all my own automotive repairs because I know the quality of "mechanics" working most places. I know that I'll get it done correctly the first time, the chances that I won't have to take it back to someone at least four times is slim to none, and I definitely don't have the time for that.
I once brought my car to the dealer I hot it from with starting issues. Basically it'd start when cold, but not if it was warm, like if you stopped to quickly pop in the grocery store, or to get gas, things like that, it wouldn't start again untill you let it sit for 30 minutes or so to cool off. Left the car for the day, when I got back to pick it up, they said they had it looked over by their mechanics but they couldn't find anything. But, they said, their head mechanic was on holidays for two weeks, and if I brought it back then he could take a look at it. Instead I brought it to a local guy with an electrical engineering degree running a small 1 man tire and car maintenance business out of a shed in his backyard who was recommended to me. He found the problem in 5 minutes. The battery was on it's way out. Replaced it, no more starting problems. So, now I have to believe that in the major regional dealership for a major car brand nobody, except maybe the main mechanic, knows to check the battery on a car with starting issues.
For the dimples one you shoulda actually consulted an aerospace engineer. Yes dimples do create vortex but that's what helps create a boundary layer and allow for laminar flow in a tube
@@Dies1r4e it's also meant for naturally aspirated single point and multi point injection systems so fuel would mix better with air and that increases slightly engine power, about direct fuel injection systems i don't know, haven't seen for them this porting style, but for turbos it's best to make it as smooth as possible
Ive seen some explanations about why sometimes dimples make a better airflow too, I dunno if this is the case but it sure isn't as simple as "dimples are bad" anyway.
modern cars have all kinds of sensors that measure exactly how much air and fuel are getting into the engine. so yes, it does improve airflow, but it usually doesn‘t increase power because the ECU will adjust boost etc. accordingly
Heya guys, so @9:18 , when he is dimpling the metal, that is a process to increase atomization of the oxygen and fuel. its more common to see them in the valve ports as well as the entire upper intake. Through micrometering, its shown that the increased breakup of the molecules helps with performance. There are slight out-weighs through Atomization>Surface area. But through some instances, it performs better. There is a picture on the internet somewhere talking about why some Top-Fuel drag teams cover their work areas and engines with towels, so the competition can't see the ports or intakes. the photo was of a candid shot peeking under a towel and seeing the entire inside if the top half completely covered in those dimples, but much more intricate. Hope this helps! Much Love!
I just wish that the commentators had said something like, I've never seen this or I don't understand what they're doing so rather not comment. I would have given them more respect for admitting a lack of knowledge on something, nobody knows everything and no-one is infallible.
9:11 Happy to see that Porsche is sponsoring this video, as this process has been used in upgraded replacement intake plenums for Porsche vehicles. I had replaced my factory plastic plenum with an aluminum IPD intake plenum for my 997.1 Carrera 4S and this process was to increase the "Laminar Flow" in the intake and help make more HP. Throttle response was improved, and with the mated upsized throttle body the dyno showed nice improvements.
telling how the old guy, Paul is stuck in his ways and the young lady was genuinely open to new ideas. Together in a shop they would be a formidable team
If I'm not mistaken, dimpling an intake pipe like that one clip is actually better than a smooth flat surface. The dimples create air pockets/vortex's and those air pockets/vortex's act as a cushion for the air and increase velocity of the air flowing through the pipe. Now, this would almost be negligible on a "low horsepower" car (I'd guess below 1000hp) but would be beneficial on high performance car (over 1000hp) where every little thing matters. I remember watching a video where some engineers were talking about the amount of work and effort that went into a 2000hp (i think) GTR and how they got to a point where the smallest changes would net them a few hp as they hit the limits of the turbos and engine. I'd imagine they would have done this to their heads as there is some scientific backing behind a dimpled pipe leading to higher air velocity. Feel free to let me know if I'm wrong but I'm pretty sure I'm right.
The second one is solved by a tool called an "Impact Screwdriver". You hit the butt of the handle with a hammer and it converts the impact into twisting the shank of the driver. That way you fully seat the bit into the screw so you don't round out the head trying to get it out.
The "get out of my face price" had me laughing so hard. Weve definitely all had those. Glad I found this channel. Its rare these days to find other techs who know their stuff.
I would love to see a vid with old school mechanics proving tips and tricks they learned over the years and have the new school rate them. Some of those old school techs are worth their weight in gold when it comes to mechanical knowledge.
Scotty or whatever and car wizard are good. There's also a ford guy that rebuilds triton engines and stuff. Shows how awful they are. Ford mak* something
@@RaburnTPF0297 But some of us realize there are changes and we keep up with them...I'd never trust a younger "ACE mechanic" with an electrical problem. Most of them have zero clue about how an electrical signal flows within the components.
I remember watching a video from the 1930's about auto racing and the guy checked for misfires by literally slapping the exhaust manifolds with a wet hand looking for hotspots. Was interesting but don't think you can do that nowadays lol
Man, I love the holy trinity that is Angelina, Sandro, and Paul. I mean, it might just be great editing, but I'm getting just such good vibes from y'all hanging out
On the subject of that power-balance test, in piston-engined aircraft, we do essentially this test before every flight (although checking for the operation of the magnetos and the spark-plugs rather than individual cylinders) and we have switches in the cockpit to accomplish it. Flicking the switch grounds out the P-lead. Just as the good lady says, we are looking for a drop in revs (and to check that the engine continues to run smoothly).
Truthfully I trust the girl to work on my car over the others. Her main focus seems to be not just doing the repairs but also not causing additional damage or costs in the process. Even when she said a hack would work she said it was a bad idea because it could cause the customer additional costs.
@@KingKablooie They mean they're one of those idiots stuck in the 1950s that think that women are incapable of doing anything outside of a kitchen. Don't worry, the world is leaving these morons behind.
@Tom_Tom_Klondike For me I just liked how she was really focused on not causing more damage that would need repairs. Some mechanics don't worry about breaking stuff while working because they can sell you parts and service for that and you never even know they caused it. I have run into a few shady mechanics in my day.
I liked how she commented about the memory of dented metal. I assume that willingness to pop back into its original shape probably degrades over time so I would think that it's best to get dents fixed sooner rather than later especially when using paintless dent repair.
@@pkdude5334 yes and no in my experience...If there are no creases or hard lines in the panel, you should be able to work it back to normal with little issue... but, going back to what you said about time, the longer you leave it, better chance it develops hard lines and can't be straightened out without real work
Only real gripe I have is the power balance test. Yes it increases the risk of damaging the driver for the coil; but you can have a screw driver or test light very close when you pull the ignition wire so that if the coil is good the electrical current has a good ground to go to. I have done plenty of these tests on older cars and never had a issue pulling the coil wire. Not saying she's wrong, just adding on to what is good practice.
You guys might’ve changed my career for the better with that sponsor, I’ve been working dead end dealership jobs my whole life, I’ve done full service, quick lane, porter, service advisor and nobody has ever offered a program so comprehensive and affordable. I’m down as hell.
I am absolutely clueless when it comes to car work. My dad was a GM engineer and tried his hardest to teach me and my brother his trade, but I was more into football and video games lol. This was a great and informative video for people like me who might fall for bad “hacks” as shown here. It was cool to see some knowledgeable mechanics give their thoughts to the viewers, and funny to boot!
The issue is that the area used to dimple woukd be better off just being opened up. I think the concept is that the large dimples create a buffer zone for air to ride over increasing velocity. Problem is the buffer it creates is larger than actually helps
@@suprafastmafc the dimpling works because turbulent flow seperates later than laminar flow on the trailing edge of a ball, and dimples are a nice symmetrical way to create turbulence on a ball. Unless you have flow seperation, dimples will make your airflow worse.
Back in the 80s, a friend of mine did the head work for a well known NASCAR team. He said after extensive flow bench testing, they determined there was better atomization of the intake charge when the intake ports were finished with a 120 grit sandpaper roll and the exhaust ports were finished to a mirror finish to minimize carbon build up.
came here to say the same. i had a well known machinist build the heads for my buell engine and he finished the intake ports rough for better atomization of the fuel. that bike absolutely ripped
that depends entirely on the engine, 80's were still using carburetor's so atomisation was important. That no longer is necessary, dead set smooth is better in the vast majority of cars after the 00's with fuel injection.
@@RyanKowalski-yb8pr I go no finer than a 60...maaybe an 80 grit roll. Polishing is a waste even on the exh. For my own stuff I rarely even use more than a carbide finish it runs the same
Not Priming the oil into a turbo makes a difference if you are keeping the car a long time and do a lot of oil changes those 3-5 seconds without oil on startup add up to damage over 250-400,000km and kill turbo. Oil change every 5,000km over 250,000km = 50 oil changes Times 4 Seconds = 3.3 Minutes of running without oil in the turbo. (No different to letting it run 3 minutes non stop without oil) Modern Turbos are built to last, 350-500,000KM without failing. So if your dies in less than atleast 250,000km it was YOUR Fault.
From a body technician's perspective, I find it quite interesting how they pulled the camera away before they showed all of the little dents being removed with the ball, then cut back to the panel after it was nice and smooth. There had to be some light hammer work at a minimum to make that as smooth as it was.
Using an imprint on the finger to match tool size is interesting but as said the imprint doesn't usually last long. However a trick I use is using a small chunk of blutack instead to get an impression - I always have blutack around the place, damn useful stuff for lots of useful little "hacks". . .
The blutack is probably an improvement, yeah, but I bet I can improve that further. There are non-drying modelling clays out there. Try a small lump of that stuff. It wouldn't want to stick the way blutack does. Cheap too.
@@ColonelSandersLite Yeah modelling clay works too. I like the tack because unless you leave it on for a few minutes it doesn't really stick at all, it just isn't strong enough. I've had the same 0.5 " ball in my toolbox for about 15 years. It never really dries out, when it is left for a while it gets a bit more solid but you knead it for a minute or so and it goes back to pliable. If it gets dirty you just knead it for a while and the dirt goes onto your hands and you just wash your hands. Also have another ball next to my solder station to gently hold stuff in place too small or delicate for a vise/clamp - like I said loads of diy uses lol
Alternatively, get an inkblotter like police use for fingerprinting, get the imprint, dip in the ink, press on paper. An accurate impression that stays. In an emergency motor oil would also probably work.
a standard air compressor tops out about 110psi and cans are rated to handle a minimum of 120psi with most able to take over 200 before deforming so there's not much chance of that can popping unless it has a defect or is rusty but even then it will probably just leak in an anticlimactic way.
a long time ago I helped a guy jump his car who supposedly worked on cars and even built his. As a car enthusiast myself and NOT a mechanic. I had jumper cables and decided to help him jump his car because we determined the starter wasn't working along with any electrical components. So naturally our 1st guess was the battery was dead. he hoked up the cables and I double checked the cables before starting the engine and he hooked the cables wrong on both cars. 💀
You won't be hired unless you have prior experience in european or Porsche cars. You missed the whole point of the ad. You apply for a non tech job to be eligible to apply for their service technician training program. Porsche won't let you touch anything mechanical without the first level of certification and that's just a glorified lube tech position till you start gaining more time and certifications under your belt.
4:30 He's not wrong, priming a bearing Turbo is realy important because the shaft is centered and guided by the oil pressure. Those first 3 sec of it running at idle with around 8000rpm can damage the turbo because air has accumulated in the oil inlet line as a result of it being unscrewed from the turbo. What happens now when you start the engine, the oil pressure builds up slowly but before the oil reaches the turbo, the air bubble that has accumulated in the oil supply line is suddenly pushed through plain bearing, meaning no lubrication can be guaranteed and any oil that was already in the turbo is pushed out. The result is the bearing runns dry and there is minimal damage that can lead to an early death of the turbo. To prevent this, you should of course never put a screwdriver in it, but rather disconect the ignitione/injection so the engine cannot start and press the starter for about 30sec so that the oil can reache the turbo without it spinning fast and no damage is done.
@@andrew348 lmaooo what, this generation doesn’t know shit about cars that’s why they get ripped off by mechanics. Dudes my age can’t even change their own oil or change a tire smh
@@CodyCopper04 You ain't wrong...Only thing it seems to do for me is disappear my weekends because my relatives are a bunch of cheap fucks and do not, or can not buy something that will reliably point A to point B
That’s one of the coolest sponsors I’ve seen in awhile, great job donut and Porsche, love seeing them advertise education for careers well real careers that will actually get you places and places that give you an education you’ll actually use. No ballroom dancing Scientologist
I'm a recent sub, and I have watched at least 20 of these videos in the last week; you guys are hilarious!!! But moreover, for the nerds out there, I gotta say I love Angelina's vernacular. She has an extensive vocabulary, and she casually drops SAT words throughout the video. For example, "viscosity." Like, for real, none of the other guys are utilizing the adjective "viscosity" in their everyday dialogue, but I love it!
As for the dumplings on the intake. Yes it provides extra turbulence so the air fuel mixes better, but it also increases air velocity. Because yeah it's not a golf ball, but physics are physics. Liquids move across a thin layer of itself and it actually reduces friction because the dimples create that microscopic layer of turbulent air. The rest of the air flow isn't even contacting the metal anymore. You can buy pistons with this, and I've seen it on alot of diesels. You need to RnD it to get a more effective pattern, (it doesn't have to look exactly like a goofball pattern) the people who make pistons have a patented design, but I imagine a couple hours of fluid dynamics study will help you figure out what patterns have what effect.
@@anonymitya9535 same, I'm a mechanic but not a car mechanic. She has a similar thought pattern and is very easy to understand. The whole crew is great as a whole to be honest.
I can confirm for you, Porsche is offered at Nascar Technical Institute in Mooresville, NC. I had a 3.96 GPA, Perfect Attendance, All classes including Mopar and Mr.Wolfe's S.P.E.C Master Class, then went on to be given 100% Tuition to Mercedes-Benz USA Master Class in (Jacksonville) Orange Park, FL. Now I Own my business and I collect and restore 70's-00's rare Cars and am an Owner Operator as well so I can Long Haul transport and relocate vehicles all over the US.
11:35 My dad did this once, but he pulled the cable off the spark plug while the engine was running and the voltage increased much higher than normal and arked through the cable he was holding. He also held the engine hood up with his other arm, so the electricity went through his heart too. He god a huge shock, but thankfully it wasn't harmful. He didn't do that again...
Crazy how far you guys have come in such a short time, honestly back then i thought how do these videos not get over 1 Million views but now you guys have sponsorships with Porsche thats just amazing🧡
9:00 you can also use petrol/gas (whatever however you call it), it's even less viscous than water and it will run down the valves into the ports if they are leaky, without any air pressure needed. Also won't cause rust.
yea but i wouldn't risk it, for the main reason that you could accidently start a fire if you ain't careful, which some redneck car guys usually ain't that careful when doing that.
@@georgiosomythos6430 are you serious?! gasoline has a risk of fire always because gasoline is highly flammable! and if you do something stupid with it, then yea its gonna ignite and burn your house or garage down. the fumes of gasoline are whats the danger factor here, you don't even have to touch the liquid with a lit cigarettes.
@@Zeakthecat mechanics work with gas flowing everywhere and don't get too many fires. Come on, if you spill gas you have full idea that you can light a fire with it. If you can't be responsible around flammable fluids then maybe don't work around cars.
Hey guys and gals, dimpling the surface of a cylinder head port works in the same way it does for a golf ball: the indentations create turbulent pockets which reduce boundary layer separation of the air moving into the combustion chambers, increasing the CFM. The mechanic in the video learned something in school.
My take on the dimples in the intake is, I don't think the effect would be an increase of velocity, but of turbulence leading to improved homogenization of fuel and air. The effect would be on carbureted engines but not Port F I or Direct Injection.
On port injection engines it makes a small amount of power too, in germany theres one Mechanik who dyno testet it, and got solid results, but its not enough to actually sell them
if the intake looks like the surface of a golf ball, small air cushions are created which make the surface softer and with this surface the air flows faster than with a polished surface
The golf ball dimples are used in high end audio applications to raise airspeed/lower friction on waveguides and other surfaces where signal thus air speed is required. I would say that this theory has merit. These folks are mechanics and not physicists.
And its benefits are in the section after the fuel is injected, the fuel fills up the holes and creates a surface where the fuel air mixture can glide and slide over
The idea of dimples is to control boundary separation at areas where turbulence can be set up by the airflow separating from a surface like the trailing edge of a golfball. An intake should be designed in a way to maximise laminar flow throughout the operating range with minimal turbulence - so the dimples wont help.
not only it wont help but even made the intake less efficient, and the golf ball is about surface geometry to create surface vacuum so the air glide over the surface and close at the back of the ball reducing drag or low pressure region created behind the ball. Somewhat similar to subsonic bullets traveling thru water creating a cavity traveling farther then same bullet with high velocity that mostly disintegrate at the impact. In short the dimples act like he restricted the pipe and not help the air flow at all.
Exactly! Dimples only work as they add turbulence allowing the Airstream to essentially 'stick' to the surface so as to reduce the low pressure area directly behind the ball. (The Low pressure pocket behind the ball adds a ton of drag.)
@@wilf609 weirdly the Mythbusters had a test where they covered a car in dimples and they did it REALLY haphazardly and they got a sufficient gas difference from it, I think something like 7% increase. They were really weirded out by it too.
Bread doesn't just work for clutch pilot bearings. If you have to solder copper pipe but the upstream shutoff valve is still dribbling a bit of water, plumbers will often stuff a bread plug into the pipe so they can keep the joint dry as they solder it. Take the aerator off the downstream faucet, turn on the water supply, and the bread plug vanishes down the drain.
There has been quite a bit of research on dimpling intake ports. Like a golf ball the dimples can reduce drag as the air passes over the surface. It can also help with air stagnation and the formation of droplets of fuel on intake walls. It's not exactly the same for every application but has been proven to have positive results for sure. All motor Honda guys use it for horsepower on a budget with decent gains for the effort.
I had the passion for cars when I was younger, I went to become a mechanic, and when I finally got one in a garage on the outskirts of town, I lasted about 2 years, the sexism, of maybe the customers, really drove me down, I got fed up of people asking to speak to "my dad", like what? I was 16, I was a damn good mechanic. The second thing that really passed me off about the job, was when customers would not take care of their cares then blame us, one customer drove a car in that was making a right noise, turned out, he hadnt put oil in it since he bought it, and it was grinding itself to death, then claimed we were trying to con him by saying his engine was fucked... We told him to go to get a second opinion then, and he picked up a stone from our drive and threw it through the garage window.
I love how they were all so impressed by the thumb thing. It's something so simple and obvious when you see it, that you can't believe you'd never thought of it before.
For the grinding of the intake, the idea works well on 2 stroke engines. You’ll can look up the professional racing saws crowd and they will do this alongside an exhaust port and polish; bumps power significantly.
The finger hack, I've been doing that for decades. It's REALLY useful for "seeing" what kind of fastener, or if it is one in places you can only touch. Damn rivets.
@7:00 -- years ago, the Army sent me to the other side of the world for a little over two years. While I was out and away, my sister (and her husband) had the "loan" of my car. They put over 10K miles on it... without changing the oil. Whenever the engine started to knock, husband would just pour in another quart. No, he didn't bother to check what kind: "It's all the same." I did not find out about this until two weeks after I got back, the lifters collapsed. You can imagine what the oil (and filter) looked like. Repairs cost almost as much as a new engine.
Whoever's in charge of getting sponsors needs a massive raise
They need more sponsors to pay for it
@@Fresh1O1O then looks like somebody better get fuckin busy huh
I'm sure porsche approached them. They will have filled up their apprenticeship programme in a few hours. Great opportunity too.
Having 7 million subs probably helped a lot
@@crazedw00kie haha right!
Justin looked so happy doing the sponsored segment. I know he’s been around a little bit now but it’s so nice seeing Justin become comfortable on camera and becoming an amazing host. It’s like he’s been doing it forever he’s become a natural.
Yeah I remember when he first started out he was so awkward and looked kinda nervous, but I'm glad he's start to get more comfortable and open. I feel like the energy and just friendship of all the guys at Donut is just infectious as FUCK. It's great to see the chemistry between everyone and it makes me smile that Justin is getting along well. Also, fucking PORSCHE sponsored this video? Damn that's cool
@@jamesquevedo1191as soon as i started seeing him in videos i know my boy has potential and damn he’s dope
@@leakybandz1208 I love seeing him just make cameos in Zach and Jeremiah's show about testing tools. They're all sciencey and smart and they'll just call Justin over to break stuff 🤣
WE STAN JUSTIN
I’m so happy he’s actually talking more because he is so knowledgeable
The fact that you guys partnered with Porsche to offer this kind of program is incredible. Hats off to whoever came up with this idea. Sky is the limit all around!
Yeah honestly they’ve come so far I love to see it
Higher standards, I’m loving it!
Yeah I love hitting fast forward. Why is every comment dick riding a 7m sub page for advertising? Jesus
Angelina: Lecture
Paul: WTf Man?
Sandro: HeHe thats dope
Sponsored by PORSCHE? Man you guys are hitting it big time, nice one 👍👍👍👍
Literally yelled *WUT* 🤯
Les go
Probably wouldn’t change my mind either 😂😂😂
yea dude they should do a hi low porsche series
MrBeast and then Porsche I was like holy shit we’re going somewhere!!!!❤❤❤❤ hells yes boy!!!
Well, they've been sponsored by Porsche before when Nolan talked about the Cayenne in one of his Wheelhouse episodes. That sponsored bit was talking about their pre-owned Porsche program.
Can we talk about how far Donut has come in terms of sponsorships.
How far they’ve come in general is flipping amazing.
@@nichickmetfacts
Yeah even johnny sins keeps commenting on their vids
@Ashley White *insert scottish accent* disgusting.
True man it goes bigger and bigger
Sandro seems like the type of dude to fix your car and then put some upgrades in it just because he felt like it at no extra cost.
Sweetie Sandro
QQ
@@SEATACxá
That's the sign of a good tech. I love when I'm doing heavy line work and let a customer know hey you need this or I am going to go ahead and take care of this while I'm in here. If I have to take things apart around a serviceable item to get where I need to whats the cost of a few minutes to take care of it.
Also ps "they aren't going to send it to you dry" when it comes to turbos, work for Hyundai 🤣
Paul definitely seems like the kind of guy that if you're a customer, you want him watching over the shop because he will make sure things are done right, and if you're his employee you'd better have your game together because he will put you out on your ass in a heartbeat if you screw around.
I love the difference between an instructor and the two shop owners on when something is "bad practice" vs "gotta do what you gotta do" 😂
I was wondering about the differences in their approaches why she was so much stricter and going after the ideal everytime. While the others were much more practical and focused on the reality. I didn't even think about the fact that she is an instructor and they are practicing technicians.
@Aaron Burkeen it would most likely be due to the way the automotive instructor has to teach. The main certification all automotive instructors are trained for is the ASE certification test, the instructor knows that test to a tee they change their couses to meet that tests standards. Though with it being a test it is hard to test real world situations so many times the ASE exam is a lot more strict as the automotive instructor is
She looks very incompetent ... That big lecture for destroing ECU was pretty lame and untrue
@@miletinic920 Right, let's base our determination of competence on your biased opinion of what she looks like. good job, troll.
@@miletinic920 the guys said the same thing. She was right, and replacing an ecu and harrness is in fact lame. 👍
As someone currently apprenticing at a porsche dealer I thought the sponsor ad was insanely cool today. Not only did I not skip it, I watched twice.
I had to skip it because I know I’ll never own a Porsche. Which makes me sad but I am happy for ye over there :D
Is it worth it to work at a Porsche dealer? Are you a tech or sales?
@Taylor Smith I'm a tech and I think it's worth it. I get to see so many cool things that most mechanics don't get to, and attend porsche specific technical training courses. There are lots of extra hoops to jump through, and lots of attention to detail which is expected.
That’s awesome, I’m hoping to jump over as in house counsel to Porsche NA in a few years.
@@taylorsmith3031 Of course its worth working at a Porsche dealer, those guys charge you Ferrari/Lamborghini repair prices, even if they did absolutely nothing.
Your salary will be amazing.
Donut is the MVP for putting duration bars under their sponsor ads.
Don't tell Porsche that, teehee
It's amazingly helpful
The one channel I tend to watch the ads for tho! 😂
I still watch their ads tho, especially even they're funny
@@Bman-wm4ib nah their ads so good it’s almost not worth putting the bar there
I’ve done the rear brake delete trick. I’ve also been pushed by the rear wheel drive through an intersection with my front only brakes locked in the rain. Almost lost my life that day. After that I just put it in neutral before I got to the light. Made it home safely to change my shorts.
How far gone were your tires, dude? Unless you stepped on the gas, that shouldn´t even be possible?
Anyway, glad you dodged it!
Sponsored by Porsche! Congrats for this achievement and reward! You deserve it. 🎉
I am not a fan of Porsche but it is impressive that Donut has car manufacturer sponsor
Bro they're a massive multi-media conglomerate - the people you see on the channel don't run donut whatsoever. It's a corporate company.
they, much like most of the industry right now, are desperate for technicians. it's about time they started advertising for these positions like this
*GAWK GAWK GAWK*
@@markus7166Ben Shapiro compilation
The Porsche sponsorship is INSANE! Whaaat! Well done Donut!
like your profile pic
No it's not, they've had Porsche sponsor before. Also dodge and other brands.
This is nothing new or big. Also not much of a sponsorship when it's just Porsche getting free advertising for kids to go to a school they can't actually go to
@@brucebonner3491 Porsche is not getting free advertising. They paid donut for this haha
@@talonmcmanus88 hahahah false.
Stop acting like you work for the business kid. Fucking pathetic.
Facts prove they didn't. Just like how 70% of "sponsherships" don't pay anything. Also sponsherships are usually less then $2,000 which is jack shit.
I wouldn't be suprised if you're just like the hundreds of other imbeciles in the comments that don't understand how the platform works, and are soo desperately trying to defend and protect a company that has no care for your existence in the first place
@@brucebonner3491 You have to be the most outspoken and arrogant person I've ever seen who simultaneously knows absolutely nothing. Where did you pull those statistics from, and why do you think that applies to Donut Media? If you think a channel with 7.5 million subscribers shoots an advertisement and includes it at the beginning of their video without pay you have to be taking the piss
No one ever does this, but I just wanna shout out @Porsche for sponsoring this video and proactively seeking out people in this audience that might have the interest and the aptitude to join their business. Well done @Porsche.
The real definition of "smart ads" for sure!
You can't even have a selt belt ticket on your record to work for them.
Porsche is a Volkswagen with a better PR guy.
It was just an ad. Sounded as cheesy and generic as any other featured paid-content.
@@agentelvis81 how much advertising do you see to buy a Porsche? Working for them?
Respect to the young lady, she's legit.. Whoever's in charge of getting sponsors needs a massive raise.
I agree she knows her stuff but does she have any practical experience. I always heard, those that can do, those that can't teach.
@@sundance2005 What you heard was told to you by idiots that resent being taught anything, slow learners.
@@sundance2005 I mean it's written that she is an instructor
@@sundance2005 she is better.
@@sundance2005using a generalization to shit on an automative mechanic instructor is definitely a choice
its crazy how big donut media is getting, watched you for ages and I'm glad you guys are finally getting the recognition you deserve
they’ve been big. look at their sub count
@@nacl2858 ik they are big, what I'm saying is I've been watching them for so long its wild to see how far they have come
I'm not even a car guy and I regularly watch Donut videos 😭
I really really like that new mechanic. He is hilarious without even trying. I can’t imagine if he got more comfortable on the show.
Sandro? yeah dude got like old school Fast Furious vibe going on with him and I love it, he's laconic but somehow fits with Donut Media. Tried looking up Miranda's Shop on youtube but got nothing tho
"Welp, engine's out." lol I think I'd like working for that guy
“Three mechanics, and a girl who teaches a class.”
Idk who needs to or will see this but Paul and Lextech are such a good shop! I know this isnt a review page but they fr deserve the recognition. I brought my ‘16 Civic to them thinking I had an issue w my alternator and they originally told me me it was the alternator, but Paul personally came up to me saying it wasn’t the alternator as it began to charge when different buttons were being pressed. He recommended me to a shop that specializes in Hondas to have them check it out. Paul saved me from a $700+ bill! Definitely recommend them for basic check ups and toyota/lexus maintenance! 10/10!!
Lots of laughs. Hope there's more videos like this! "Class 8" mechanic here since the late 80s. Some of the tricks I know people argue and can't believe until they try it or you do it in front of them and prove it. Example: Heating a bearing in an oven so it slides right on a shaft instead of wrestling with it on a press.
Jeri’s love for the power brake hack while everyone else hates it makes me happy for some reason. He just personifies MO POWA BABY!
Roadkill!!!
It will only work on old vehicles, they make new cars have brake lines that have a front and back brake connected to it so its safer if one gives out
The smirk on his face when she says "needs a special tool to pull it out" 😂
Are they brother and sister? They look so alike!
2 funny :)
I chuckled at "at the base of the shaft" 😄
Angelina's laugh at pull out and grease is just priceless!
Love mechanic react videos
I hate angelina
And shaft..lol
the hack at 6:30 is horrible and insanely dangerous. These cans of flammable stuff are usually pressurized with either an inert gas on another propellant gas of some sort. Repressurizing it with an oxidizer creates a literal bomb. if so much as a tiny bit of flame gets to the spray and it catches fire, the fire will flash back through the valve and near instantly burn up the fuel/oxidizer mix inside the can creating an explosion that would likely blow your hand clean off and the shrapnel wouldnt be good for anything in a 10 meter radius either.
So its basically a homemade grenade
Really?? That’s awesome! Thanks for that!
Nah
@@Llama_charmer Not really. You can throw a grenade; this only blows up in your hand while you're using it.
plus if you over put to much pressure in the can it will blow off your fucking hands
As a mechanical engineer, I think we should look more into the dimple concept. I don't think it will have huge increase in power, but I'm curious to know what will happen. Technically the dimples should reduce drag.
Agreed. You see dimpling on some high performance cars' underbelly panels. They wouldn't bother if the effect were unmeasurable. The dimpling also increases the internal volume of the intake runner, which may or may not be beneficial. A good calibrated flow bench might give you some data, but you'd really have to do the test on an engine dynamometer to prove the hypothesis. In any case, I doubt it's really worth the effort if you were trying to get significant gains.
Small engine companies like Sthil already do it. Although it's an inverse dimple. It should aid in cutting low pressure areas and also (my guess) aids in cooling effects in carbureted engines. Port injection too for that matter.
The way I understood it air has less resistance against air, instead of air against a metal surface..... Have seen some pro's porting that left a rougher surface instead of polishing. Claiming these exact results
I was thinking the same thing. Dimpling breaks up laminar flow, which sticks to the smooth surface, creating a low pressure film. This low pressure film slows the air flow for a distance away from the surface, depending on air speed. The dimples create little vortices, with the direction of rotation going in the same direction as the air flow. This stops the laminar flow and the associated air flow reduction. Think of it as fluid ball bearings. The dimple diameters and depths need to be calculated based on pressure and flow rate so their effect does not go into the desired airflow area. Creating random dimples may or may not help performance. Automotive maufacturers don't do this as it's very time consuming to machine, thus increasing the part cost. The performance gain might not be enough to create a sale, especially if a larger diameter pipe could fit in the same location.
they produce turbulence and break air molecule to the max, more the molecule is broke tinner is the air .thecnicaly you can get more air plus it get the intake bigger. porting guys know theyre shit. some set up are better polish other dimple like that .
The Angelina/Jeremiah combo is always comedy gold.
That’s gotta be his sister right? They look a little too similar imo
@@Embiid-is-my-God Yeah....kinda
@@Embiid-is-my-God But he is kinda big in comparation to Angelina
@@brunex_247 Siblings can be different sized. I'm 5'9" and my younger brother is 6'3"
Aye she knows her stuff big time
You gotta be really careful refilling cans like that. They're designed to be disposable so they're not reinforced enough to be repressurized safely and walls or valves can easily fail.
Not only that, for air you need much thicker walls to withstand pressure.
I mean, most folks at home are pushing 90-125psi, but that's probably high for the can. Gentle bursts highly recommended, dont try to fill it til she blows for sure
@@kjur18 Don't be daft. 90psi is 90psi. Doesn't matter if it's air, water, butane or anything. The only reason the air tank for a compressor might need to be extra thick, is that you'll end up with condensation inside the tank, which will rust it out. So the walls of the tank need to be thick enough to survive some corrosion. After a few years the tank may need to be replaced due to internal corrosion. OR, use a dryer on the compressor outlet.
@@noxious89123 Well, yeah. But keep in mind that whatever gas they use in spray cans is in liquid form at that pressure, so it's more efficient as a propellant. To turn air into liquid you need much more pressure. As Wiki says on Canned Air: "True liquid air is not practical, as it cannot be stored in metal spray cans due to extreme pressure and temperature requirements. Common duster gases include hydrocarbon alkanes, like butane, propane, and isobutane, and fluorocarbons like 1,1-difluoroethane, 1,1,1-trifluoroethane, or 1,1,1,2-tetrafluoroethane which are used because of their lower flammability. "
Not only that, but spray cans are not filled with pressurized air. It's a refrigerant that becomes a liquid at a relatively low pressure. In the same way that liquid water can only get so hot before it boils, the refrigerants can only get a little pressure build up before they condense.
The reason why a golf ball is dimpled is to cause the airflow to leave the surface more easily on the lee/downstream side. It's a known aerodynamic effect, where an object that's a bit too blunt at its rear is better to have the flow separated a bit earlier, where the object is larger, than to have the airflow continue further around the rear of the object, because the resultant eddies would cause more drag than forcing the flow to separate early. A golf ball is essentially spherical, which is aerodynamically poor, and it can be oriented at any angle, so it's dimpled all over to ensure that the flow leaves it reasonably quickly at all times. There was a Russian fighter jet in the cold war that had similar dimpling near the back to make the airflow leave the fuselage and reduce drag. For whatever reason, the aircraft had to be short, which made the rear section cut inward more tightly than ideal, so dimpling was added to get better airflow separation and reduce drag. However, if it were possible to make the fuselage longer and more sleek, that would've worked even better.
For what looked like an intake runner that was steadily curved, this dimpling is completely unnecessary because the flow is trapped and it has to change direction through its largely constant cross-section. The dimpling would only be beneficial where the intake tract opens up, and only on the lee-side of a bulge, but the idea for the intake is to angle the flow so it goes through the intake valve(s) nearly perpendicular to the valve stem, so the only place where there might, in theory, be any benefit is just inside the combustion chamber (dimpling there would be bad for valve sealing and combustion deposits, so that's a no-go zone), or if the port can't be opened up enough at the valve guide(s), on the lee-side of that. However, better intake geometry would work considerably better. In the intake runner, where there's a constant cross-section, dimpling won't help because it will cause turbulent flow. Through that area, it's better to make the surface smooth.
“It’s only a dollar my dude” that shit killed me 😂😂😂
like $8 a can here.
Oh man that cholo you guys had was a freaking G! Bring him back more!
Dude reminds me of cousins. You know this guy's house smells like tamales right now.
@@737215 he doesn’t do Oil Changes…. He does Oralé Changes
we need those 3 full time on donut
Damn, had me laughing. I grew up in Sounthern California, hispanic dude was the man. You definately made me a bit homesick. Thanks
Brought a triumph head to a machine shop that mostly did race motors. Did a port and polish job myself that i was quite proud of, he told me the exhaust ports were perfect but the intake sides benefited from being a little textured, his explanation was you wanted to create turbulence when the air/gas entered the chamber for a more complete burn.
I have heard this as well. I was into dirtbike/4 wheeler racing 2 decades ago and when we had a port and polish the intake side of things created turbulence (spiral grooves usually) to mix air/fuel better for combustion, and the exhaust side was smooth as glass. Now I am going to research to see if that was all bullshit.
I like that Angelina was the dissenting voice in many of the iffy hacks because she knew there were better ways to do the things they were doing and therefore it wasn't a hack.
She really knew her shit and I've the assignment.
She's the one I would go to for regular maintenance and repair work, the other two I would go to for an undiagnosable/irregular repair.
Nothing to do with who is better, simply that strange issues sometimes require strange solutions that probably aren't standard but fix the problem.
But I'd trust her to follow manufacturers procedure and have the right tools to do the cleanest most professional job.
@@CheeryRhymes The guys id trust to get a beater going from point a to point b, but I wouldn't let them anywhere near a new car.
The fact is that some people will (either subconsciously or consciously) think that it's okay if they do something jank or outright dangerous with their vehicle, because they don't care if they get hurt. They never think about if someone else gets hurt. Look at the idiots that had that "show car" on the road and rear ended a minivan with family in it. The only brakes that worked were the front ones and they got cooked in seconds. They didn't care and almost killed children over it.
Asoon as I saw a female I turned this off they are not mechanics
I love these videos. As a mechanic of 15 years I can say Paul is a G and knows his shit. The girl is a little too by the book sometimes and it makes sense since she's an instructor.
I was just thinking, as someone who knows next to nothing about cars, if I had to pick my mechanic to fix my car out of all these, it would probably be Paul or Angelina based solely off my impression from watching the video.
As a mechanic in the making as soon as I saw they said no to the misfire diag I thought it was a good hack but I also only did this with distributor systems
No matter the trade, an instructor teachers you the rules.
At work the good experienced guys teach you what exactly the rules do and why, they also know why the rules change when things get modded etc and what the new rules are.
instructor?? id would of said 1st or 2nd year apprentice ,its 2022 i fully understand why shes there
By the book is sometimes harder, but ensures the job is done correctly. I've taken plenty of shortcuts that have worked, but could have led to other problems if they didn't. I think being cautious of stuff like that is fair. The dude drilling out the bushing, for example, could definitely have scraped the inside and maybe it will eventually not sit in correctly.
I'm surprised more dealerships/brands haven't done ads like Porsche in this video. I feel like this is the perfect audience to have good conversion on ads like this.
That's because nothing breaks down at the rate of German plastic.
I had an old Ford Ranger on the Carolina coast years ago… the brake line rusted out and I was spraying brake fluid down the highway till there was nothing left. I made it to the exit, the manual transmission made it possible to control the speed a bit, found the leak and was able to cut it to pinch it off. I was young and saved the day… Just one of those golden memories. 😊
About the crossed-wires jumpstart part... I once made this mistake because my friend's car had the red positive cap installed on the negative lead and vice-versa, and I took that as good enough info. Luckily, it started smoking at the terminal almost immediately so we pulled it and no damage was done, but ALWAYS check for the embossed "+" and "-" on the plastic of the battery, and don't trust that the black and red caps are installed correctly!
that's solid advice ty
I've done this too at work with tractors before too😅 same thing wrong coloured covers on 1
Also the positive terminal is slightly bigger
Same thing happened to me. I was helping a friend, and my glasses prescription was so bad I couldn't see the +/- marks (it was a VW Golf and the battery is way back by the windshield). I think I turned green when I realized what happened. I was terrified I'd wrecked her car.
I've also seen newer cars that don't have red for positive, it's just black for both. If you can't see the + and - on the battery, you've then gotta follow the cables to try and figure out which one is ground.
I think the overall takeaway from these videos is that TikTok and other social media can be a really good way to share car knowledge, but it's only really useful as a source if you *already know what you're doing* well enough to tell which advice to throw away. I think everyone in this video learned something new, but it was always a new application of knowledge they already had, and they knew what was trash because it was obvious from their experience.
The comeback of Audience Guy makes me cry of joy.
Also the video and the sponsor are so good. Love this
I thought the same thing
Pre Hi-Low James
Almost no one working in a shop is a "technician". I spent a decade working as both an auto mechanic and tractor trailer diesel mechanic. 90 percent of people working in a shop have little to no training or education in mechanics or engineering. They just started somewhere and got some hands on training along the way, which means that you have a ton of people working in shops that have almost no idea what they're doing with electrical, engines, transmissions, transfer cases, or anything else more complex than changing tires or oil. They're too proud to ever tell anyone that they've had very little experience with any particular type job so they fumble through it until they get lucky. Just because they have their ase doesn't mean that they know anything either, because they've dumbed down the ase test to the point that pretty much anyone that's ever seen a car one time could go take it and pass. That's all well and good if you get the 50 year old plus mechanic that's had time to learn from all his mistakes, but that's not the norm. Even though I really don't have the time most of the time, I still do all my own automotive repairs because I know the quality of "mechanics" working most places. I know that I'll get it done correctly the first time, the chances that I won't have to take it back to someone at least four times is slim to none, and I definitely don't have the time for that.
I once brought my car to the dealer I hot it from with starting issues. Basically it'd start when cold, but not if it was warm, like if you stopped to quickly pop in the grocery store, or to get gas, things like that, it wouldn't start again untill you let it sit for 30 minutes or so to cool off. Left the car for the day, when I got back to pick it up, they said they had it looked over by their mechanics but they couldn't find anything. But, they said, their head mechanic was on holidays for two weeks, and if I brought it back then he could take a look at it. Instead I brought it to a local guy with an electrical engineering degree running a small 1 man tire and car maintenance business out of a shed in his backyard who was recommended to me. He found the problem in 5 minutes. The battery was on it's way out. Replaced it, no more starting problems.
So, now I have to believe that in the major regional dealership for a major car brand nobody, except maybe the main mechanic, knows to check the battery on a car with starting issues.
For the dimples one you shoulda actually consulted an aerospace engineer. Yes dimples do create vortex but that's what helps create a boundary layer and allow for laminar flow in a tube
a lot of factors there, but yes, I wouldn't be shocked if that moved air more efficiently
@@Dies1r4e it's also meant for naturally aspirated single point and multi point injection systems so fuel would mix better with air and that increases slightly engine power, about direct fuel injection systems i don't know, haven't seen for them this porting style, but for turbos it's best to make it as smooth as possible
Ive seen some explanations about why sometimes dimples make a better airflow too, I dunno if this is the case but it sure isn't as simple as "dimples are bad" anyway.
modern cars have all kinds of sensors that measure exactly how much air and fuel are getting into the engine. so yes, it does improve airflow, but it usually doesn‘t increase power because the ECU will adjust boost etc. accordingly
Golfball
Heya guys, so @9:18 , when he is dimpling the metal, that is a process to increase atomization of the oxygen and fuel. its more common to see them in the valve ports as well as the entire upper intake. Through micrometering, its shown that the increased breakup of the molecules helps with performance. There are slight out-weighs through Atomization>Surface area. But through some instances, it performs better. There is a picture on the internet somewhere talking about why some Top-Fuel drag teams cover their work areas and engines with towels, so the competition can't see the ports or intakes. the photo was of a candid shot peeking under a towel and seeing the entire inside if the top half completely covered in those dimples, but much more intricate. Hope this helps! Much Love!
Thankfully someone typed this out to save me the trouble 👍🤣
I just wish that the commentators had said something like, I've never seen this or I don't understand what they're doing so rather not comment. I would have given them more respect for admitting a lack of knowledge on something, nobody knows everything and no-one is infallible.
@@TheRealShambo halfway through typing I was like "crap. I'm invested into this comment" lol
@@TheRealShambo Agreed
Also, air bubbles will form and sit in the dimples. Air has less resistance than metal.
9:11 Happy to see that Porsche is sponsoring this video, as this process has been used in upgraded replacement intake plenums for Porsche vehicles. I had replaced my factory plastic plenum with an aluminum IPD intake plenum for my 997.1 Carrera 4S and this process was to increase the "Laminar Flow" in the intake and help make more HP. Throttle response was improved, and with the mated upsized throttle body the dyno showed nice improvements.
telling how the old guy, Paul is stuck in his ways and the young lady was genuinely open to new ideas. Together in a shop they would be a formidable team
Dude I'll never get tired of Paul's takes in these videos. So informative!
If I'm not mistaken, dimpling an intake pipe like that one clip is actually better than a smooth flat surface. The dimples create air pockets/vortex's and those air pockets/vortex's act as a cushion for the air and increase velocity of the air flowing through the pipe. Now, this would almost be negligible on a "low horsepower" car (I'd guess below 1000hp) but would be beneficial on high performance car (over 1000hp) where every little thing matters. I remember watching a video where some engineers were talking about the amount of work and effort that went into a 2000hp (i think) GTR and how they got to a point where the smallest changes would net them a few hp as they hit the limits of the turbos and engine. I'd imagine they would have done this to their heads as there is some scientific backing behind a dimpled pipe leading to higher air velocity. Feel free to let me know if I'm wrong but I'm pretty sure I'm right.
Well just like a golf ball would like to see numbers of before and after.
@@chrisstuefen2386 there's plenty of research papers on the topic, a simple Google search will provide a plethora of information on the topic.
The second one is solved by a tool called an "Impact Screwdriver". You hit the butt of the handle with a hammer and it converts the impact into twisting the shank of the driver. That way you fully seat the bit into the screw so you don't round out the head trying to get it out.
The "get out of my face price" had me laughing so hard. Weve definitely all had those. Glad I found this channel. Its rare these days to find other techs who know their stuff.
I would love to see a vid with old school mechanics proving tips and tricks they learned over the years and have the new school rate them. Some of those old school techs are worth their weight in gold when it comes to mechanical knowledge.
Scotty or whatever and car wizard are good. There's also a ford guy that rebuilds triton engines and stuff. Shows how awful they are. Ford mak* something
It’s true but man them old mechanics can get you into trouble too cause the old ways aren’t always the best and they’re just stubborn 😂😂
@Raburn which is why I'd love to see the vid i mentioned.
@@RaburnTPF0297 But some of us realize there are changes and we keep up with them...I'd never trust a younger "ACE mechanic" with an electrical problem. Most of them have zero clue about how an electrical signal flows within the components.
I remember watching a video from the 1930's about auto racing and the guy checked for misfires by literally slapping the exhaust manifolds with a wet hand looking for hotspots. Was interesting but don't think you can do that nowadays lol
Loved how they tried to contain themselves while talking about “pulling out” 😂
Jeremiah: 😄
Man, I love the holy trinity that is Angelina, Sandro, and Paul. I mean, it might just be great editing, but I'm getting just such good vibes from y'all hanging out
"I pee myself a little bit every day, and I'm doing just fine!" 😂🤣
On the subject of that power-balance test, in piston-engined aircraft, we do essentially this test before every flight (although checking for the operation of the magnetos and the spark-plugs rather than individual cylinders) and we have switches in the cockpit to accomplish it. Flicking the switch grounds out the P-lead. Just as the good lady says, we are looking for a drop in revs (and to check that the engine continues to run smoothly).
Truthfully I trust the girl to work on my car over the others. Her main focus seems to be not just doing the repairs but also not causing additional damage or costs in the process. Even when she said a hack would work she said it was a bad idea because it could cause the customer additional costs.
LOL good luck.
@@markgunther2502 what do you mean good luck my guy
@@KingKablooie They mean they're one of those idiots stuck in the 1950s that think that women are incapable of doing anything outside of a kitchen. Don't worry, the world is leaving these morons behind.
I think she is good at explaining partially because she also works as a teacher at a college
@Tom_Tom_Klondike For me I just liked how she was really focused on not causing more damage that would need repairs. Some mechanics don't worry about breaking stuff while working because they can sell you parts and service for that and you never even know they caused it. I have run into a few shady mechanics in my day.
The way she laid out and described all the steps in those process's was fantastic...Girl knows her shit.
and she hella cute too
I liked how she commented about the memory of dented metal. I assume that willingness to pop back into its original shape probably degrades over time so I would think that it's best to get dents fixed sooner rather than later especially when using paintless dent repair.
@@pkdude5334 yes and no in my experience...If there are no creases or hard lines in the panel, you should be able to work it back to normal with little issue... but, going back to what you said about time, the longer you leave it, better chance it develops hard lines and can't be straightened out without real work
Only real gripe I have is the power balance test. Yes it increases the risk of damaging the driver for the coil; but you can have a screw driver or test light very close when you pull the ignition wire so that if the coil is good the electrical current has a good ground to go to. I have done plenty of these tests on older cars and never had a issue pulling the coil wire. Not saying she's wrong, just adding on to what is good practice.
@@fightingfalconfan no such thing as a power balance test 😂. He was checking for a misfire
You guys might’ve changed my career for the better with that sponsor, I’ve been working dead end dealership jobs my whole life, I’ve done full service, quick lane, porter, service advisor and nobody has ever offered a program so comprehensive and affordable. I’m down as hell.
I am absolutely clueless when it comes to car work. My dad was a GM engineer and tried his hardest to teach me and my brother his trade, but I was more into football and video games lol. This was a great and informative video for people like me who might fall for bad “hacks” as shown here. It was cool to see some knowledgeable mechanics give their thoughts to the viewers, and funny to boot!
My hack for fixing cars is taking it to a qualified and certified mechanic.
Bugman
@@ajspice xD
he knows our secret 😭😭😭
The golf ball dimpling is actually something Mythbusters tested in one of their episodes. Would be worth looking into further!
The issue is that the area used to dimple woukd be better off just being opened up. I think the concept is that the large dimples create a buffer zone for air to ride over increasing velocity. Problem is the buffer it creates is larger than actually helps
From what I've seen you don't dimple intakes like this unless it's running a carburetor. It's for fuel atomization.
@@suprafastmafc the dimpling works because turbulent flow seperates later than laminar flow on the trailing edge of a ball, and dimples are a nice symmetrical way to create turbulence on a ball. Unless you have flow seperation, dimples will make your airflow worse.
Back in the 80s, a friend of mine did the head work for a well known NASCAR team. He said after extensive flow bench testing, they determined there was better atomization of the intake charge when the intake ports were finished with a 120 grit sandpaper roll and the exhaust ports were finished to a mirror finish to minimize carbon build up.
came here to say the same. i had a well known machinist build the heads for my buell engine and he finished the intake ports rough for better atomization of the fuel. that bike absolutely ripped
that depends entirely on the engine, 80's were still using carburetor's so atomisation was important. That no longer is necessary, dead set smooth is better in the vast majority of cars after the 00's with fuel injection.
What looks good on a flowbench doesnt always translate to better performance.
@@RyanKowalski-yb8pr I go no finer than a 60...maaybe an 80 grit roll. Polishing is a waste even on the exh.
For my own stuff I rarely even use more than a carbide finish it runs the same
Not Priming the oil into a turbo makes a difference if you are keeping the car a long time and do a lot of oil changes those 3-5 seconds without oil on startup add up to damage over 250-400,000km and kill turbo. Oil change every 5,000km over 250,000km = 50 oil changes Times 4 Seconds = 3.3 Minutes of running without oil in the turbo. (No different to letting it run 3 minutes non stop without oil)
Modern Turbos are built to last, 350-500,000KM without failing.
So if your dies in less than atleast 250,000km it was YOUR Fault.
From a body technician's perspective, I find it quite interesting how they pulled the camera away before they showed all of the little dents being removed with the ball, then cut back to the panel after it was nice and smooth. There had to be some light hammer work at a minimum to make that as smooth as it was.
Or they filmed it before denting it...
Yes! There was a couple little dings in the metal with the 'before'... and the 'after' was as smooth as new.... no way that happened as shown lol
Using an imprint on the finger to match tool size is interesting but as said the imprint doesn't usually last long. However a trick I use is using a small chunk of blutack instead to get an impression - I always have blutack around the place, damn useful stuff for lots of useful little "hacks". . .
The blutack is probably an improvement, yeah, but I bet I can improve that further. There are non-drying modelling clays out there. Try a small lump of that stuff. It wouldn't want to stick the way blutack does. Cheap too.
@@ColonelSandersLite Yeah modelling clay works too. I like the tack because unless you leave it on for a few minutes it doesn't really stick at all, it just isn't strong enough. I've had the same 0.5 " ball in my toolbox for about 15 years. It never really dries out, when it is left for a while it gets a bit more solid but you knead it for a minute or so and it goes back to pliable. If it gets dirty you just knead it for a while and the dirt goes onto your hands and you just wash your hands. Also have another ball next to my solder station to gently hold stuff in place too small or delicate for a vise/clamp - like I said loads of diy uses lol
Alternatively, get an inkblotter like police use for fingerprinting, get the imprint, dip in the ink, press on paper. An accurate impression that stays.
In an emergency motor oil would also probably work.
The dude repressurizing the can of carb cleaner also runs the risk of creating a grenade lmao
a standard air compressor tops out about 110psi and cans are rated to handle a minimum of 120psi with most able to take over 200 before deforming so there's not much chance of that can popping unless it has a defect or is rusty but even then it will probably just leak in an anticlimactic way.
DON'T DO THAT, PLEASE.
DON'T DO THAT, PLEASE.
Done it many times, works like a charm!
@@IsntThisAStupidName yeah the thing is carb cleaner is flammable and normal air has oxygen
a long time ago I helped a guy jump his car who supposedly worked on cars and even built his. As a car enthusiast myself and NOT a mechanic. I had jumper cables and decided to help him jump his car because we determined the starter wasn't working along with any electrical components. So naturally our 1st guess was the battery was dead. he hoked up the cables and I double checked the cables before starting the engine and he hooked the cables wrong on both cars. 💀
Little buddy audience member return! 10:00 I feel like rewatching all the Up to Speeds again now. Lol
So jazzed to see "in the crowd James"!!! I've missed him!
I applied for a service technician for my local Porsche dealership through y’all . I hope I have some good news to share with you all 🤞🏿
best of luck
@@innocentguy1 thanks man
You won't be hired unless you have prior experience in european or Porsche cars. You missed the whole point of the ad. You apply for a non tech job to be eligible to apply for their service technician training program. Porsche won't let you touch anything mechanical without the first level of certification and that's just a glorified lube tech position till you start gaining more time and certifications under your belt.
4:30 He's not wrong, priming a bearing Turbo is realy important because the shaft is centered and guided by the oil pressure. Those first 3 sec of it running at idle with around 8000rpm can damage the turbo because air has accumulated in the oil inlet line as a result of it being unscrewed from the turbo. What happens now when you start the engine, the oil pressure builds up slowly but before the oil reaches the turbo, the air bubble that has accumulated in the oil supply line is suddenly pushed through plain bearing, meaning no lubrication can be guaranteed and any oil that was already in the turbo is pushed out. The result is the bearing runns dry and there is minimal damage that can lead to an early death of the turbo. To prevent this, you should of course never put a screwdriver in it, but rather disconect the ignitione/injection so the engine cannot start and press the starter for about 30sec so that the oil can reache the turbo without it spinning fast and no damage is done.
He was so impressed with himself when he said "bread-press" lol was cute
I feel like having car knowledge is one of the biggest flexes nowadays
It's just your insecurity
@@andrew348 lmaooo what, this generation doesn’t know shit about cars that’s why they get ripped off by mechanics. Dudes my age can’t even change their own oil or change a tire smh
I’ve got car knowledge, the only reason it’s a flex is because you save money. It doesn’t make you cool.
@@CodyCopper04 You ain't wrong...Only thing it seems to do for me is disappear my weekends because my relatives are a bunch of cheap fucks and do not, or can not buy something that will reliably point A to point B
I've gotten laid just cause I knew how to change oil at half off. Be proud.
That’s one of the coolest sponsors I’ve seen in awhile, great job donut and Porsche, love seeing them advertise education for careers well real careers that will actually get you places and places that give you an education you’ll actually use. No ballroom dancing Scientologist
Scientology is a religion.
@@Fatima-ti1qq As much money as they make off of their 'believers' You could call them a career... or scam both fit.
I'm a recent sub, and I have watched at least 20 of these videos in the last week; you guys are hilarious!!! But moreover, for the nerds out there, I gotta say I love Angelina's vernacular. She has an extensive vocabulary, and she casually drops SAT words throughout the video. For example, "viscosity." Like, for real, none of the other guys are utilizing the adjective "viscosity" in their everyday dialogue, but I love it!
I like that the dudes are like "yeah send it" on some of the hacks and the girls like "nah don't do that, it risks damage".
My dad is the only man I know who worries about doing it right and minimizing damage. Both of my brothers are of the "Fuck It" variety. 😂
Something Something Why Do Women Live Longer Than Men 🤔
The dudes been doing that shit everyday🤣. Id trust that street knowledge over any book smart
Because they understood the point of the video and she did not.
@@lowkey7850because they don't do underwater welding or get drafted and sent to a foreign jungle with an m16. They don't do shit
"He's using bread as a press hngehehe. It's a breadpress!" Love how excited he's when explaining it 😂
NEVER CHANGE THIS GROUP, I love the partners here and the mechanic y’all are prefect
As for the dumplings on the intake. Yes it provides extra turbulence so the air fuel mixes better, but it also increases air velocity. Because yeah it's not a golf ball, but physics are physics. Liquids move across a thin layer of itself and it actually reduces friction because the dimples create that microscopic layer of turbulent air. The rest of the air flow isn't even contacting the metal anymore.
You can buy pistons with this, and I've seen it on alot of diesels.
You need to RnD it to get a more effective pattern, (it doesn't have to look exactly like a goofball pattern) the people who make pistons have a patented design, but I imagine a couple hours of fluid dynamics study will help you figure out what patterns have what effect.
Bring Sandro back next time you guys do this he's hilarious 😂
10:09 had me dying of laughter for minutes. The acting is underrated
Absolutely 🤣🤣 that was priceless
Justin’s killing it out here. Keep putting him in videos.
Angie Sandro and Paul, the terrific trio
Love this series! And so cool that you all got a Porsche ad! Love seeing car companies work with you guys
angelina should have her own segment. I’d watch just her reacting to stuff. Loved her explanations
She needs to get back on her TH-cam channel
Simp
She definitely stands out. Incredibly smart.
She's got the looks with intelligence to back it up, not common nowadays with social media clout.
@@anonymitya9535 same, I'm a mechanic but not a car mechanic. She has a similar thought pattern and is very easy to understand. The whole crew is great as a whole to be honest.
Darn, I wish Porsche offered a similar program when I was looking into UTI. Sounds pretty awesome!
Urinary tract infection!?
I can confirm for you, Porsche is offered at Nascar Technical Institute in Mooresville, NC.
I had a 3.96 GPA, Perfect Attendance, All classes including Mopar and Mr.Wolfe's S.P.E.C Master Class, then went on to be given 100% Tuition to Mercedes-Benz USA Master Class in (Jacksonville) Orange Park, FL.
Now I Own my business and I collect and restore 70's-00's rare Cars and am an Owner Operator as well so I can Long Haul transport and relocate vehicles all over the US.
Ace hardware does the same with Stihl.
Porsche does have a program with UTI. I did the Peterbilt program through the diesel side
False boojie and daniel
Not a hack. That's exactly why some screwdriver handles are hex shaped.
11:35 My dad did this once, but he pulled the cable off the spark plug while the engine was running and the voltage increased much higher than normal and arked through the cable he was holding. He also held the engine hood up with his other arm, so the electricity went through his heart too. He god a huge shock, but thankfully it wasn't harmful. He didn't do that again...
Crazy how far you guys have come in such a short time, honestly back then i thought how do these videos not get over 1 Million views but now you guys have sponsorships with Porsche thats just amazing🧡
9:00 you can also use petrol/gas (whatever however you call it), it's even less viscous than water and it will run down the valves into the ports if they are leaky, without any air pressure needed. Also won't cause rust.
The fact that they suggest to use water for valve leak check is a f.. joke but what can you do?
yea but i wouldn't risk it, for the main reason that you could accidently start a fire if you ain't careful, which some redneck car guys usually ain't that careful when doing that.
@@Zeakthecat there is no risk for a fire wtf are you talk about? Do you think aluminium can light gasoline? I love to talk on internet :-D
@@georgiosomythos6430 are you serious?! gasoline has a risk of fire always because gasoline is highly flammable! and if you do something stupid with it, then yea its gonna ignite and burn your house or garage down.
the fumes of gasoline are whats the danger factor here, you don't even have to touch the liquid with a lit cigarettes.
@@Zeakthecat mechanics work with gas flowing everywhere and don't get too many fires. Come on, if you spill gas you have full idea that you can light a fire with it. If you can't be responsible around flammable fluids then maybe don't work around cars.
Hey guys and gals, dimpling the surface of a cylinder head port works in the same way it does for a golf ball: the indentations create turbulent pockets which reduce boundary layer separation of the air moving into the combustion chambers, increasing the CFM. The mechanic in the video learned something in school.
Sandro is hilarious 😂 seems like a good dude
all three of them are just lovely
My take on the dimples in the intake is, I don't think the effect would be an increase of velocity, but of turbulence leading to improved homogenization of fuel and air. The effect would be on carbureted engines but not Port F I or Direct Injection.
On port injection engines it makes a small amount of power too, in germany theres one Mechanik who dyno testet it, and got solid results, but its not enough to actually sell them
if the intake looks like the surface of a golf ball, small air cushions are created which make the surface softer and with this surface the air flows faster than with a polished surface
The golf ball dimples are used in high end audio applications to raise airspeed/lower friction on waveguides and other surfaces where signal thus air speed is required. I would say that this theory has merit. These folks are mechanics and not physicists.
It creates a boundary layer, and flows better than a smooth port.
And its benefits are in the section after the fuel is injected, the fuel fills up the holes and creates a surface where the fuel air mixture can glide and slide over
The idea of dimples is to control boundary separation at areas where turbulence can be set up by the airflow separating from a surface like the trailing edge of a golfball. An intake should be designed in a way to maximise laminar flow throughout the operating range with minimal turbulence - so the dimples wont help.
not only it wont help but even made the intake less efficient, and the golf ball is about surface geometry to create surface vacuum so the air glide over the surface and close at the back of the ball reducing drag or low pressure region created behind the ball. Somewhat similar to subsonic bullets traveling thru water creating a cavity traveling farther then same bullet with high velocity that mostly disintegrate at the impact.
In short the dimples act like he restricted the pipe and not help the air flow at all.
Exactly!
Dimples only work as they add turbulence allowing the Airstream to essentially 'stick' to the surface so as to reduce the low pressure area directly behind the ball. (The Low pressure pocket behind the ball adds a ton of drag.)
@inorite4553 actually now thatvi think about it....dimpling your butterfly valve and throttlebody however....
If they did work performance cars would have them from the factory.
@@wilf609 weirdly the Mythbusters had a test where they covered a car in dimples and they did it REALLY haphazardly and they got a sufficient gas difference from it, I think something like 7% increase. They were really weirded out by it too.
Bread doesn't just work for clutch pilot bearings. If you have to solder copper pipe but the upstream shutoff valve is still dribbling a bit of water, plumbers will often stuff a bread plug into the pipe so they can keep the joint dry as they solder it. Take the aerator off the downstream faucet, turn on the water supply, and the bread plug vanishes down the drain.
There has been quite a bit of research on dimpling intake ports. Like a golf ball the dimples can reduce drag as the air passes over the surface. It can also help with air stagnation and the formation of droplets of fuel on intake walls. It's not exactly the same for every application but has been proven to have positive results for sure. All motor Honda guys use it for horsepower on a budget with decent gains for the effort.
I had the passion for cars when I was younger, I went to become a mechanic, and when I finally got one in a garage on the outskirts of town, I lasted about 2 years, the sexism, of maybe the customers, really drove me down, I got fed up of people asking to speak to "my dad", like what? I was 16, I was a damn good mechanic.
The second thing that really passed me off about the job, was when customers would not take care of their cares then blame us, one customer drove a car in that was making a right noise, turned out, he hadnt put oil in it since he bought it, and it was grinding itself to death, then claimed we were trying to con him by saying his engine was fucked... We told him to go to get a second opinion then, and he picked up a stone from our drive and threw it through the garage window.
You were 16 years old... I'd be second guessing you as well.
Plenty of middle age male mechanics are borderline useless.
16 year old = good mechanic, what?
Danggg a Porsche sponsor that’s crazy congratulations y’all been here since you guys would have small companies/ nun sponsor the channel
I love how they were all so impressed by the thumb thing. It's something so simple and obvious when you see it, that you can't believe you'd never thought of it before.
For the grinding of the intake, the idea works well on 2 stroke engines. You’ll can look up the professional racing saws crowd and they will do this alongside an exhaust port and polish; bumps power significantly.
Your post made me sentimental for my old bikes. I loved my 2 strokes.
The finger hack, I've been doing that for decades. It's REALLY useful for "seeing" what kind of fastener, or if it is one in places you can only touch. Damn rivets.
These were my favorite guests on the show. Keep the real mechanics coming on.
@7:00 -- years ago, the Army sent me to the other side of the world for a little over two years. While I was out and away, my sister (and her husband) had the "loan" of my car. They put over 10K miles on it... without changing the oil. Whenever the engine started to knock, husband would just pour in another quart. No, he didn't bother to check what kind: "It's all the same." I did not find out about this until
two weeks after I got back, the lifters collapsed. You can imagine what the oil (and filter) looked like.
Repairs cost almost as much as a new engine.