The " supercharger" cylinders used on this engine work by smoothing out the vacuum pulse generated by the engine during the intake phase of the piston travel. When the fuel in the cylinder is lit off by the spark and the piston is shoved down the first port to be exposed is the exhaust port. Venting exhaust gases rush out developing inertia that helps start vacuum generation. The piston continues its downward motion, along with inertia trying to keep gases in motion. The amount of vacuum increases rapidly until the intake port is exposed by the motion of the piston wich is now near the bottom of its stroke. This is where the supercharger bottles step in. Normally the vacuum that has developed over the piston is now pulling air/fuel mixture into the cylinder. A portion of that vacuum is routed to the carb to operate the fuel pump. Because the engine is so small and only one cylinder is used vacuum is not constant, it pulses. The vacuum pulse is routed to a diaphragm against a spring and check valve in the carb. That is how the little slobberbox carb pumps fuel from the tank. The chargers help in two ways. First it extends the amount of time that vacuum is present by acting as a vacumm resevoir. This creates a stronger fuel pump stroke pulling more fuel. Secondly, smoothing out the vacuum pulse by making air instantly available at the piston face on demand and without carrying more fuel with it. When the mixture is right the entire crankcase will be wet with fuel for lubricating purposes, so the insertion of extra air during the pulse portion of intake cycle means more power during ignition. It will have a power band effect much like a tuned exhaust does br using sound to keep burning gases in the cylinder just a little longer. Its a great idea, but in practice its hard to pull off.
That’s the most concise, easy to understand and easiest (for me) to visualize in my mind answer that I’ve ever seen. Anywhere. Ever. Thanks! You should be a science textbook editor - I bet you can explain anything to people and make it so even a 5th grader can understand. Thanks again!
I can't believe I understood all of that...and it's definitely not me. Your explanation made clear images in my head about something I know nothing about. Thanks!
@@sgtrock68 I am glad you found it educational. I have a tendency to be long winded because there is a lot of information to process. Visualizing what is going on inside is most beneficial when something goes wrong. Two strokes are temperamental little bastards, and diagnosing a poorly running trimmer, or chainsaw will be much easier now that you know. I appreciate the response.
If he stopped after it became red hot it wouldn’t work again. Also it was a clutch designed for long life while racing and so built to take a beating over and over. High end racing cars couldn’t handle doing this as they are light and designed to be used by people who won’t do this. Cars have safeties to prevent this i would think...no clue though just best guesses here
If nothing else, all this explains why the clutches on the mini bikes we had as kids gave up so easy haha Insane the spring got red hot... To think that's all conduction from the shoes... Doesn't have a means of making its own heat (shouldn't be rubbing on the shoes in any significant manner). Surprised there aren't cooling fins standard now on clutches but I guess it's not that much an issue in normal use. To think we tried rubber bands to fix the bikes 🤣🤣🤣
This definitely is a great demonstration showing why you should keep your trimmer guard on your weed whacker. The guard (aside from obviously deflecting debris) actually contains a cutter blade that cuts your trimmer lines to equal and proper lengths. The length of the trimmer line while that head is spinning at full RPM's is actually your governor, and when you have MASSIVELY long trimmer lines, it's adding SO much more friction for that clutch to turn, resulting in EXTREMELY fast clutch shoe and drum wear and very often breaking the spring itself. Working at a power equipment place for nearly 8 years, I've seen so many landscapers destroy their clutches due to taking the guards off of their brand new trimmers. What's worse is all the metal dust that it sends all over the engine that cakes up onto the flywheel magnets and bearing surfaces. Literally there is no good reason to take a trimmer guard off with all that considered, let alone the massive additional stress it puts on the engine and drive components itself. This was a really neat thing to actually see happen in real footage, though!
Favorite part, 4:50, where the spring screams NOOOOOO gets ejected while glowing, stretches due to centripetal force, and then gets all "wound around the axle"...so many great individual disasters coincidentally occurring there, all in just a few multi-K rpm turns of the shaft/clutch (previously) internals. I especially enjoyed the part where it said "oh no you don't", and dragged that poor chunk of escaped molten metal back in for more! Wonderful!!! Clutch haters around the world would be proud. One interesting addition would have been a strain gauge to measure the poor beast's success/failure at transmitting torque throughout this transmissive torture. I thought about going all 'turbo encabulator' here, but figured this was bad enough. The clutch in my son's Toyota, which after 300K + miles was slipping SOOO badly that he had to give up and turn around on hills (had been slipping since about 200K, but he kept insisting the engine would go at any time, even though it ran great, smoked not one bit, and was as noiseless as new, NO knocks or ticks. I finally talked him into bringing it over to change the poor clutch out. The flywheel was still in surprisingly good shape, so he WAS being careful...and I'm not kidding, it would slip prodigiously with VERY minimal throttle opening, barely above idle, at the end. The valve cover gasket was leaking so badly you could hardly find the engine for the exterior gunk, so we cleaned it all of and I replaced the gasket while he wasn't looking (literally). You should have seen under the valve cover. There was NO gunk, not even a large amount of finger scrapeable brown discoloring, still mostly aluminum colored, so he was good about oil changes. I wouldn't be at ALL surprised if it goes another 100 K. He keeps it on principle now. Other than the clutch, and getting hit sitting at a stoplight badly, which he had a guy pull out with a come-a-long so the lid would close again, he's had VERY few problems with it. Those Toyotas are (were, anyway) ridiculously well engineered, specd, and built. I will send him this link, he will enjoy it, then give me back some smart-ass and/or silly remark, at which I will laugh. He's a good "kid"...though it's obvious he's an adult by every definition given that almost all of those are around-town miles. With your propensities, I thought maybe you would enjoy that story. If he answers this, he will be quick to point out that it was HIM who finally purchased the cover gasket, which is true, at some urging (it's going to give up any time now, it's become a family comic meme). ;-) I wish I could include a picture of it, it is so sad. He makes enough to buy 20 of these a year now, considering what he paid for it used, and it was in at least b+ condition then, at about 120K miles. I'm sure everybody at his place of employment laughs every time they see it, at least when they did. Like many, he works from home now. He does CAD work, and programs a lot of support SW for that system to lighten engineer work load as well. Once the owners figured out what he was actually doing for him, they love him there.
Hey WP they're called booster bottles the concept of the is to catch unburnt gas/exhaust and force them back into the engine to be recycled and burnt off and provide more power.
They've been proven that they are are not effective other why's the most powerful 2 strokes back in the day would have come with them. They're more of a Gimmick.
I once read about them in some 50cc tuning forums about them helping for a better reaction time of the motor when taking on the gas after breaking. Not sure if it really helps.
When you leaned in to looked at that two stroke clutch, I was expecting a piece to fly out and get you. Be careful, bro. We're born with ten fingers, but only two eyes...
3:58 [dramatic voice] In the bowels of the earth, an ancient mechanism forged by giants powers the eternal forge of Cent'Rifukal, the hidden race that mines iron under the crust of our world.
The bottles are called boost bottles. And as someone commented, they came on a couple of YZ Yamaha motocrossers. I didn't see all the comments on it, but the ones I saw were close to what they do. The principle is, when the piston comes up to cover the intake port on a 2 stroke, it stops the airflow. The bottle allows the airflow to keep going a small amount. When the piston moves out of the way, the bottles dump their pressure. Once again, it's such a small amount that it does not constitute a supercharger. It was designed to help keep the jets and air passages operating consistently at low rpms. It's benefit was only a very small increase in low rpm torque. When airflow gets up to mid rpm or higher, the bottles have no effect. Motocrossers are such high rpm rev'ers that any gain in low rpm torque can be a premium. On the Yamaha's it was mostly beneficial to those who didn't know how to finesse the clutch. Yamaha discontinued them due to the minimal amount of extra torque you got out of them, considering that you can just clutch your way out of low speed corners.
4:46 - omg! 6:38 - these 2 tanks are "boosters" or boostbottles. Such booster helps air/fuel mixture to flow more stable through carb via rejecting pulses and fast pressure chages, therefore adds power to 2 stroke engine providing stable mixture under stable pressure on intake phase. It physically works as resonator by accumulating pressure generated by mixture inertia facing closed intake valve, and release this pressure when valve is open so it normalizes avarage pressure of intake. BUT! It's very delicate to tune such things on 2 stroke engines, it is hard to find right volumes, stiffness of bottle and lenght of hoses to achieve any significant power growth, so boostbottles are rare to see)
@Captain MufDyven considering 2 stroke engines probably yes, but good exhaust pipe on 2 stroke gives much much more power outcome than bbottle on intake does. Bbotlle often is like finding last 5-3% of best 2-stroke performance, while good exhaust resonator pipe may give up to 50% power growth. Also bbottle is all about narrow rpm range which is always pretty high (10000rpm+ to see some efficiency)
Same as they used in Ford Focus in Rally, reducing the turbolag, and was banned. Smart People aways being reduced to regular people to "Fit" as regular.
Awesome! Thanks Matt. In the 70's kids in Europe had usually 4 years of moped time, 50cc limited. I had a Sachs 2 gear with standard cluch and later a Piaggio Ciao with such a centrifugal cluch. On every uphill section is kept slipping. I did so many Alpine passes and worried so much about the cluch pads. But now I see them in large quad bikes and they are super reliable. Btw the Kohler was designed in Italy for the Indian rikshaw market where the terrain is steep. Kohler was an Austrian migrant to the US who saw the light to add to his bathroom empire. I found in the City of Jaisalmer near the Pakistani border the rickshaws all use this engine to nail it up the steep fort. Crap diesel makes a big stink. Diesel unlike gasoline does not disperse well so the droplets burn the nitrogen in the air that combines with sulfur and moisture to form orange smog. Nox was hard to measure and VW found out the hard way! On the other hand the US is the largest NOx producer presumably for anesthetic uses but in reality 80% somehow finds its way into motor racing. Strange how an unwanted byproduct can either pollute or even act as a catalyst to increase power.
The "tanks" are not really superchargers, they add to the air volume of the crankcase breathing 2cycle engine, changing the power band, similar to plenum volume, and intake runner lenth in a car engine. It works with the intake pulses, reflected waves and such, I don't know how well they work, but I guess they do,
you may have an award winning industrial slo-mo short film. you capture all the elements a seasoned photographer or filmmaker would. it's quite beautiful.
Excellent demonstration of just what an amazing material our metal alloys are. The deformation in that ring was astounding! We'd never have been able to build engines without such a durable but also flexible material. Here's to centuries of metallurgists and skilled metal workers whose work makes all our tough machines go!
That failure on the 2-stroke clutch was more likely due to work hardening around the weld rather than the weld itself causing a weak spot. You could see this in the slow mo, as the clutch housing flexed evenly across its entire circumference except for at the welded anchor point.
I enjoyed watching this because I've never actually seen a centrifugal clutch work but now that I see it (especially the 2 stroke one) I see that it works exactly like the mechanical advance in a distributor
Those two bottles work by the flow of air through the carb creates a vacuum inside them as the engine revs, so when you go off the throttle, the vacuum "stored" in those two tanks sucks in excess fuel/air mix that then is ready to use when you throttle up again, so it works as a booster, as it gives less lag in your throttle response!
On my old Yamaha 2 stroke IT dirtbikes, that was called a boost bottle. They had nothing inside but somehow smoothed out the power pulses. They didn't run right without them.
Great video for my kids and I to watch, especially right after we destroyed a clutch (not intentionally) on a go kart I purchased 2 weeks ago. The go kart had been sitting out in the open, unused, through hot summers, rain, and two winters, so the bushing was probably rusted. Plus it was really wobbly on the shaft. But after it exploded, I was able to teach a show the kids how the clutch works. Thanks for the video. One more thing, please tell me you didn't lose your middle finger giving someone the bird.
Davide Antonazzo Id defo back this idea. That’s a great idea ! Really cool to see a transmission shifting at x1000 to x5000 rippums (RPM). Has anyone ever seen a gear box go bang before ? Let me tell you it goes wrong fast and with a bang especially when they let go at high RPM. Bang and gears fly off at such a speed some times they actually blow through the gear box housing wall so seeing this would be the best footage yet !
@@deltab9768 Yeah, didn't he say that was an add on to take the place of the axle? So, not centered. Agree, would have been nice with the slow-mo to show it at idle and then slowly ramp up to where the clutch pieces started to move outwards before running it right to destruction.
tanks are IMPULSE tanks.. they are resonance chambers that capture and release pressure waves to tune the intake to a specific "powerband" RPM. the intake charge gets moving towards the crank, the ports close and the pressure has nowhere to go, instead of slamming into a dead end (wasting energy) it goes into the tanks. Perfectly timed reflection of the impulse comes out of the tanks at the same time the ports open , ramming the pressure into the cylinder. i belive you can tune the engine by shortening/lengthening the pvc pipes.
Yamaha used this system on their two stroke bikes, probably other manufacturers too. My DT200 has one, they call it YEIS (Yamaha energy induction system). Even though I have that bike for years, I never tried to take it off and see the difference with and without it.
these tanks are used when you let go of the throttle and go back on it again, helps you get more instant response, usually helps with torque, many street legal 2 stroke bikes have one, they always connect AFTER the carb and will store gas and 2 stroke oil mix
those tanks are called boostbottle. When implemented like this, they areuseless or even harmful. it gives more space after the carb(butterfly valve), and is suppose to resonate with the frequency of the engine and make the air/fuel mixture stay behind the valve.HOWEVER, this needs to be tuned to the engine and the carb. simplly add a random length of tubing with a random volume of tank, doesn't do anything, and may even hurt the performance. From you slow mo, it can clearly be seen that fuel is still spuing out of carb into the air intake side of the carb,which means the boost bottle is useless or even harmful
This was pretty cooln never knew a clutch like that existed actually, kinda a genius invention for small racers like that go-cart. 2jz engines are not known for making good power stock, (they make like 180), but theyre known for their strength, that block can take a massive beating without blowing up thats how people get 1k horses out of them.
The 2JZ is known for being g able to make massive power jumps without the block grenading, as well as its ability to handle higher RPMs(potentially hitting 12,000 at times). Plus, it's not a V-tech.
@@Deathbomb9 you said they make 180 unless you don’t use horsepower the naturally aspirated engines make 220 and the turbos make 330. and of corse it’s not v-tec it’s toyota tech not honda. and in theory if built correctly a 2j could have a vvt system which is all v-tec really is
@@losh7489 all good, yet, a VVT isn't needed for a 2JZ to pass 8,500rpm. They will push 11k-12k and be just fine, all you need is an improved cooling system and the right trans hooked up to them. Also have to reprogram the ECM. And you're right about the horsepower. The old skyline engines were the ones making about 183, but that was also before what we know today as the skyline. We are talking the late 1980s skylines.
6:45 those two metal bottles are called "boost bottles" they connect to the intake manifold and basically increases the pressure of the fuel/air going into the engine creating more power
no its only to catch the air fuel mix getting blowing out the carb before the reeds close and have to be above the carb ore it will fill whit petrol if upside down and at 7.15 secs you can see whot its supposed to reduce fuel spraying out
The two tanks are "boost bottles" as others have said. Their effectiveness is questionable but the idea is that, in a piston ported engine like this, when the piston skirt closes off the intake there's a flow of air through the carb that gets stopped. That flow has momentum. The boost bottles give the flow of air somewhere to go (into the bottles). As the piston goes back up and opens the intake up again the air that flowed into the boost bottles should be getting released back into the intake to be fed into the engine. Essentially they're supposed to help increase the volumetric efficiency of the engine a bit. There's a formula to how they should be sized to get the resonance right. I don't think there's any solid evidence they have more than a negligible effect on power.
First time I've seen these things but that explanation makes sense, as well as your observation that their effectiveness is probably negligible, as like a tuned pipe (I flew models years back), the length to RPM ratio is critical and very specific. I know in the bigger two stroke world (bikes, ski's, etc), engine designer are always doing their best to get RID of narrow peaky power bands. Maybe these would work with control line speed models?
To me you're like a war hero who lost his finger for the purpose of a greater value! WOW. You still doing the same high-risk jobs is incredible. I wish I had a portion of your courage.
You know, I am a complete moron when it comes to mechanics. Especially engine mechanics. I hear clutch on a regular basis, and have no idea what it does. Just that its mechanism can somehow do something important for a car to move. Seeing the explanation of how a centrifugal clutch works instantly makes it click. Just that design is so intuitive to understand, compared to other mechanical nonsense that flies straight over my head.
I shared this video to my professor and this is what he replied, "Imagine the amount of heat generated that the chromium steel clutch shoe gets red hot and 5160 spring steel gets molten, at least 2500°C. Just don't replicate it yourself if you value your life at all."
Clutch went supernova. It grew in size at extreme Temps and then blew its outter atmosphere, just leaving its charred core behind (no black hole sorry lol)
I would love to see this with a scooter engine with the drive belt, at least 70cc or more (2 stroke only) I've always wanted to see how the belt looks like in slowmo, in pretty sure its vibrating
@@-NME I suck at English and will sound retarded trying to explain some parts on a scooter moped. But I recently change the variator belt bcs of wear, I have a 70cc Yamaha neos stuntkitted owned for over 4 years now since I was 15. And the pressurespring in the rear if the engine block can cause lots of heat if it's too hard. Also if it too soft it will be extreeeeemly hot, and I do believe when my neos was almost original except the variator, and the pressurespring I did change belt really often
@@ramo1484 I have Baotian 4T 50cc upgraded to 72cc Naraku, big camshaft, carb from a 125cc 4T, Im running a stock variator with 6,1 Malossi rollers and stock belt, stock clutch with Naraku 1000rpm spring, and I also have a chinese open exhaust for better flow, scooter runs perfectly and has power like a 125 4T
I wonder how good your motor would have done if you wouldn't have torched most of the clutch housing away. I'd love to see you put a brand new MAX TORQUE on there your brake probably wouldn't hold
Trying to tell someone that things like this happen but they visually can't see it/ picture it in their own head. It's nice to see your videos showing it.
That unhinged spring flying around at those rpm's is hella dangerous! A centrifugal clutch blew apart in my hands once when I was young and learning about them. It was a weed-wacker that I was tearing apart for a gas powered skateboard build. Anyways, all 4 pads and the spring flew past us and dented the walls/cealing! We where so lucky that they didn't hit any of us in the face or something like that. Scary memory.
Oh yeah, they have a lot of force, especially when spinning that fast. In this case I had a blast shield just off camera and I was standing off to the side. I also conducted the final failure when I was there by myself no one else was around, I was too worried when the girls were there earlier in the day. But yeah I had a blast shield just off camera. Glad you didn't get hurt, those clothes calls are how you learn unfortunately.
Honestly, if the chain wasn't there and the clutch was just about to fail that would've made an amazing background. But eh, what do I know? I'm just an idiot on the internet watching this at 10pm with schoolwork to do. Still great.
I kinda want to see what happens inside a lawnmower. Think you can make it happen? I know about destin's video, i mean to put the camera INSIDE the mower, or cut a camera-sized hole in it and put the camera in the hole to not mess up the airflow
The " supercharger" cylinders used on this engine work by smoothing out the vacuum pulse generated by the engine during the intake phase of the piston travel. When the fuel in the cylinder is lit off by the spark and the piston is shoved down the first port to be exposed is the exhaust port. Venting exhaust gases rush out developing inertia that helps start vacuum generation. The piston continues its downward motion, along with inertia trying to keep gases in motion. The amount of vacuum increases rapidly until the intake port is exposed by the motion of the piston wich is now near the bottom of its stroke. This is where the supercharger bottles step in. Normally the vacuum that has developed over the piston is now pulling air/fuel mixture into the cylinder. A portion of that vacuum is routed to the carb to operate the fuel pump. Because the engine is so small and only one cylinder is used vacuum is not constant, it pulses. The vacuum pulse is routed to a diaphragm against a spring and check valve in the carb. That is how the little slobberbox carb pumps fuel from the tank. The chargers help in two ways. First it extends the amount of time that vacuum is present by acting as a vacumm resevoir. This creates a stronger fuel pump stroke pulling more fuel. Secondly, smoothing out the vacuum pulse by making air instantly available at the piston face on demand and without carrying more fuel with it. When the mixture is right the entire crankcase will be wet with fuel for lubricating purposes, so the insertion of extra air during the pulse portion of intake cycle means more power during ignition. It will have a power band effect much like a tuned exhaust does br using sound to keep burning gases in the cylinder just a little longer. Its a great idea, but in practice its hard to pull off.
on behalf of the whole planet, thank you.
That’s the most concise, easy to understand and easiest (for me) to visualize in my mind answer that I’ve ever seen. Anywhere. Ever. Thanks! You should be a science textbook editor - I bet you can explain anything to people and make it so even a 5th grader can understand. Thanks again!
That makes seans
I can't believe I understood all of that...and it's definitely not me. Your explanation made clear images in my head about something I know nothing about. Thanks!
@@sgtrock68 I am glad you found it educational. I have a tendency to be long winded because there is a lot of information to process. Visualizing what is going on inside is most beneficial when something goes wrong. Two strokes are temperamental little bastards, and diagnosing a poorly running trimmer, or chainsaw will be much easier now that you know. I appreciate the response.
What I find most impressive here is just how long that clutch is lasting under an entirely static load.
If he stopped after it became red hot it wouldn’t work again. Also it was a clutch designed for long life while racing and so built to take a beating over and over. High end racing cars couldn’t handle doing this as they are light and designed to be used by people who won’t do this. Cars have safeties to prevent this i would think...no clue though just best guesses here
What i find most impressive is how this guy wears those sunglasses and is fluent in language other than nerd geek.
@@tonyhitch5799 💀
Yes my thoughts exactly
I know right? I bet if the clutch housing hasn't melted it would've last much longer!
The molten hot spring spinning around and grabbing that piece mid air was amazing 4:56
David Kirkpatrick "oh no you don’t, get back here!"
it really said "get over here!"
Whoa
If nothing else, all this explains why the clutches on the mini bikes we had as kids gave up so easy haha
Insane the spring got red hot... To think that's all conduction from the shoes... Doesn't have a means of making its own heat (shouldn't be rubbing on the shoes in any significant manner). Surprised there aren't cooling fins standard now on clutches but I guess it's not that much an issue in normal use.
To think we tried rubber bands to fix the bikes 🤣🤣🤣
makes for an amazing desktop background
This definitely is a great demonstration showing why you should keep your trimmer guard on your weed whacker. The guard (aside from obviously deflecting debris) actually contains a cutter blade that cuts your trimmer lines to equal and proper lengths. The length of the trimmer line while that head is spinning at full RPM's is actually your governor, and when you have MASSIVELY long trimmer lines, it's adding SO much more friction for that clutch to turn, resulting in EXTREMELY fast clutch shoe and drum wear and very often breaking the spring itself. Working at a power equipment place for nearly 8 years, I've seen so many landscapers destroy their clutches due to taking the guards off of their brand new trimmers. What's worse is all the metal dust that it sends all over the engine that cakes up onto the flywheel magnets and bearing surfaces. Literally there is no good reason to take a trimmer guard off with all that considered, let alone the massive additional stress it puts on the engine and drive components itself. This was a really neat thing to actually see happen in real footage, though!
Favorite part, 4:50, where the spring screams NOOOOOO gets ejected while glowing, stretches due to centripetal force, and then gets all "wound around the axle"...so many great individual disasters coincidentally occurring there, all in just a few multi-K rpm turns of the shaft/clutch (previously) internals. I especially enjoyed the part where it said "oh no you don't", and dragged that poor chunk of escaped molten metal back in for more! Wonderful!!!
Clutch haters around the world would be proud. One interesting addition would have been a strain gauge to measure the poor beast's success/failure at transmitting torque throughout this transmissive torture. I thought about going all 'turbo encabulator' here, but figured this was bad enough.
The clutch in my son's Toyota, which after 300K + miles was slipping SOOO badly that he had to give up and turn around on hills (had been slipping since about 200K, but he kept insisting the engine would go at any time, even though it ran great, smoked not one bit, and was as noiseless as new, NO knocks or ticks.
I finally talked him into bringing it over to change the poor clutch out. The flywheel was still in surprisingly good shape, so he WAS being careful...and I'm not kidding, it would slip prodigiously with VERY minimal throttle opening, barely above idle, at the end. The valve cover gasket was leaking so badly you could hardly find the engine for the exterior gunk, so we cleaned it all of and I replaced the gasket while he wasn't looking (literally). You should have seen under the valve cover. There was NO gunk, not even a large amount of finger scrapeable brown discoloring, still mostly aluminum colored, so he was good about oil changes. I wouldn't be at ALL surprised if it goes another 100 K. He keeps it on principle now.
Other than the clutch, and getting hit sitting at a stoplight badly, which he had a guy pull out with a come-a-long so the lid would close again, he's had VERY few problems with it. Those Toyotas are (were, anyway) ridiculously well engineered, specd, and built.
I will send him this link, he will enjoy it, then give me back some smart-ass and/or silly remark, at which I will laugh. He's a good "kid"...though it's obvious he's an adult by every definition given that almost all of those are around-town miles. With your propensities, I thought maybe you would enjoy that story. If he answers this, he will be quick to point out that it was HIM who finally purchased the cover gasket, which is true, at some urging (it's going to give up any time now, it's become a family comic meme). ;-) I wish I could include a picture of it, it is so sad. He makes enough to buy 20 of these a year now, considering what he paid for it used, and it was in at least b+ condition then, at about 120K miles. I'm sure everybody at his place of employment laughs every time they see it, at least when they did. Like many, he works from home now. He does CAD work, and programs a lot of support SW for that system to lighten engineer work load as well. Once the owners figured out what he was actually doing for him, they love him there.
The quality of these videos is astonishing
😊 Thank you! ♥️. They are not easy but I love making this stuff for everyone to see!, I myself learn something with every video I make.
@@WarpedYT Can you do a car torture test please
@Toob247 Toob247 no it's warped
@@fanguy2009 what do you have in mind?
@@WarpedYT torture test on a car
Hey WP they're called booster bottles the concept of the is to catch unburnt gas/exhaust and force them back into the engine to be recycled and burnt off and provide more power.
Perhaps because there is no expansion chamber?
Exhaust expansion chamber?
They've been proven that they are are not effective other why's the most powerful 2 strokes back in the day would have come with them. They're more of a Gimmick.
@@81AdamR yeah, sorry exhaust expansion chamber.
I once read about them in some 50cc tuning forums about them helping for a better reaction time of the motor when taking on the gas after breaking. Not sure if it really helps.
When you leaned in to looked at that two stroke clutch, I was expecting a piece to fly out and get you.
Be careful, bro. We're born with ten fingers, but only two eyes...
That was definitely a cringe moment
He is already down to 9 fingers, so I don't think he is scared of anything lol
Ham Stirrer *8.5
@@hamstirrer6882 He grew an extra finger?
He had glasses on but Idk if they were safety glasses or stylized safety glasses
3:58 [dramatic voice] In the bowels of the earth, an ancient mechanism forged by giants powers the eternal forge of Cent'Rifukal, the hidden race that mines iron under the crust of our world.
Lmao
The bottles are called boost bottles. And as someone commented, they came on a couple of YZ Yamaha motocrossers. I didn't see all the comments on it, but the ones I saw were close to what they do. The principle is, when the piston comes up to cover the intake port on a 2 stroke, it stops the airflow. The bottle allows the airflow to keep going a small amount. When the piston moves out of the way, the bottles dump their pressure. Once again, it's such a small amount that it does not constitute a supercharger. It was designed to help keep the jets and air passages operating consistently at low rpms. It's benefit was only a very small increase in low rpm torque. When airflow gets up to mid rpm or higher, the bottles have no effect. Motocrossers are such high rpm rev'ers that any gain in low rpm torque can be a premium. On the Yamaha's it was mostly beneficial to those who didn't know how to finesse the clutch. Yamaha discontinued them due to the minimal amount of extra torque you got out of them, considering that you can just clutch your way out of low speed corners.
4:46 - omg! 6:38 - these 2 tanks are "boosters" or boostbottles. Such booster helps air/fuel mixture to flow more stable through carb via rejecting pulses and fast pressure chages, therefore adds power to 2 stroke engine providing stable mixture under stable pressure on intake phase. It physically works as resonator by accumulating pressure generated by mixture inertia facing closed intake valve, and release this pressure when valve is open so it normalizes avarage pressure of intake. BUT! It's very delicate to tune such things on 2 stroke engines, it is hard to find right volumes, stiffness of bottle and lenght of hoses to achieve any significant power growth, so boostbottles are rare to see)
@Captain MufDyven considering 2 stroke engines probably yes, but good exhaust pipe on 2 stroke gives much much more power outcome than bbottle on intake does. Bbotlle often is like finding last 5-3% of best 2-stroke performance, while good exhaust resonator pipe may give up to 50% power growth. Also bbottle is all about narrow rpm range which is always pretty high (10000rpm+ to see some efficiency)
Basically how a biturbo system works too
Same as they used in Ford Focus in Rally, reducing the turbolag, and was banned. Smart People aways being reduced to regular people to "Fit" as regular.
Thanks for spreading the knowledge!
Good explanation.. I had Yamaha banshee w/ booster bottles.. it scared the shit out me sold it a week later😂
Awesome! Thanks Matt. In the 70's kids in Europe had usually 4 years of moped time, 50cc limited. I had a Sachs 2 gear with standard cluch and later a Piaggio Ciao with such a centrifugal cluch. On every uphill section is kept slipping. I did so many Alpine passes and worried so much about the cluch pads. But now I see them in large quad bikes and they are super reliable. Btw the Kohler was designed in Italy for the Indian rikshaw market where the terrain is steep. Kohler was an Austrian migrant to the US who saw the light to add to his bathroom empire. I found in the City of Jaisalmer near the Pakistani border the rickshaws all use this engine to nail it up the steep fort. Crap diesel makes a big stink. Diesel unlike gasoline does not disperse well so the droplets burn the nitrogen in the air that combines with sulfur and moisture to form orange smog. Nox was hard to measure and VW found out the hard way! On the other hand the US is the largest NOx producer presumably for anesthetic uses but in reality 80% somehow finds its way into motor racing. Strange how an unwanted byproduct can either pollute or even act as a catalyst to increase power.
The "tanks" are not really superchargers, they add to the air volume of the crankcase breathing 2cycle engine, changing the power band, similar to plenum volume, and intake runner lenth in a car engine. It works with the intake pulses, reflected waves and such, I don't know how well they work, but I guess they do,
you may have an award winning industrial slo-mo short film. you capture all the elements a seasoned photographer or filmmaker would. it's quite beautiful.
the slow mo clutch explosion was one of the most beautiful things ive ever seen.
that small diesel engine is making more torque than a honda civic
you didn’t need to say this 💀
Hold my single cam R20A
Lol they have no torque on 3000 rpm so its true
@@genioversity4955 aka saddest modern engine
torque is not important, only power is important
Diesel acts just like a big ass impact gun with how it chugs
Excellent demonstration of just what an amazing material our metal alloys are. The deformation in that ring was astounding! We'd never have been able to build engines without such a durable but also flexible material. Here's to centuries of metallurgists and skilled metal workers whose work makes all our tough machines go!
4:50 to 5:00 looks so awesome. The part when the spring grabbed a hold of that piece of metal and pulled it back, reminds me so much of God of War
looks like computer graphics almost, it looks TOO good
Gow man, these were good days
Damn...that clutch shouldn't had messed with family
Never with with my familia
That failure on the 2-stroke clutch was more likely due to work hardening around the weld rather than the weld itself causing a weak spot. You could see this in the slow mo, as the clutch housing flexed evenly across its entire circumference except for at the welded anchor point.
I really want to see an see trugh 2 (cylinder head) stroke engine, I can't find it anywhere on the internet, you will be the first one, I can't wait
Pretty sure he already did
@@ClayThunder where, I really want to see it, I searched everywhere
Up
project farm?
@@nospeakgames8802 nope could not find it there either
That one aged quite well. Glad my idea where so well received!
I felt bad for the clutch, this was more stronger than the torture in Saw movies
Lol
That slow Mo is seriously one of the coolest pieces of videography.
I enjoyed watching this because I've never actually seen a centrifugal clutch work but now that I see it (especially the 2 stroke one) I see that it works exactly like the mechanical advance in a distributor
Yep, it's like a mechanical advance combined with a drum brake.
Those two bottles work by the flow of air through the carb creates a vacuum inside them as the engine revs, so when you go off the throttle, the vacuum "stored" in those two tanks sucks in excess fuel/air mix that then is ready to use when you throttle up again, so it works as a booster, as it gives less lag in your throttle response!
Like YEIS on yamaha (RX king)
🙂 nice
Is there a car equivalent?
@@TeamStevers no
I suspected something similar only positive pressure (for some whack reason now that I think about it lol).
How effective is it?
On my old Yamaha 2 stroke IT dirtbikes, that was called a boost bottle. They had nothing inside but somehow smoothed out the power pulses. They didn't run right without them.
One of the best slow motion ever!!👍👍👍
Great video for my kids and I to watch, especially right after we destroyed a clutch (not intentionally) on a go kart I purchased 2 weeks ago. The go kart had been sitting out in the open, unused, through hot summers, rain, and two winters, so the bushing was probably rusted. Plus it was really wobbly on the shaft. But after it exploded, I was able to teach a show the kids how the clutch works. Thanks for the video. One more thing, please tell me you didn't lose your middle finger giving someone the bird.
Next video idea
See through transmission without oil/ shift without clutch
Davide Antonazzo Id defo back this idea. That’s a great idea ! Really cool to see a transmission shifting at x1000 to x5000 rippums (RPM). Has anyone ever seen a gear box go bang before ? Let me tell you it goes wrong fast and with a bang especially when they let go at high RPM. Bang and gears fly off at such a speed some times they actually blow through the gear box housing wall so seeing this would be the best footage yet !
Yes yes yes yes yes yes yes insert cut and paste yeses.
Do it do it do it
Absolutely do it absolutely do it absolutely absolutely absolutely thumbs up a billion and one.
Shift without clutch yeah
Yes
The fact that the clutch lasted that long honestly I’m impressed…
That diesel slowmo shot was the most badass shot in the world. That's as manly of a thumbnail you could ever find!
*You can press space bar right before it explodes then press < and > to see frame by frame it exploding*
4:13 that is one of the most beautiful blend of colors known to man.
That first slow no was surprisingly.. beautiful lol also not how I guessed it would catastrophically fail lol
I was thinking you'd show the mechanism move in and out as the motor speed changed. It would be even better with a strobe so it looks motionless.
On the little engine, it looked like one shoe touched at 8000 rpm, and they were both pulled out by 13000.
@@deltab9768 Yeah, didn't he say that was an add on to take the place of the axle? So, not centered. Agree, would have been nice with the slow-mo to show it at idle and then slowly ramp up to where the clutch pieces started to move outwards before running it right to destruction.
"welcome to my channel where safety is #1 priority"
*points with lobed off finger*
you looking over the engine when it had broken bits hanging off it, and was still running at 7:50 had me wincing
4:58 is one of the coolest things I've even seen in my 30+ years of existing
tanks are IMPULSE tanks.. they are resonance chambers that capture and release pressure waves to tune the intake to a specific "powerband" RPM. the intake charge gets moving towards the crank, the ports close and the pressure has nowhere to go, instead of slamming into a dead end (wasting energy) it goes into the tanks. Perfectly timed reflection of the impulse comes out of the tanks at the same time the ports open , ramming the pressure into the cylinder. i belive you can tune the engine by shortening/lengthening the pvc pipes.
Gasbox ;)
Almost, sorta, like a water-hammer/arrester. Or maybe not.
Yamaha used this system on their two stroke bikes, probably other manufacturers too. My DT200 has one, they call it YEIS (Yamaha energy induction system). Even though I have that bike for years, I never tried to take it off and see the difference with and without it.
I would hate to get one of those glowing red springs wrapped around my arm or something. I'm glad you weren't standing too close.
these tanks are used when you let go of the throttle and go back on it again, helps you get more instant response, usually helps with torque, many street legal 2 stroke bikes have one, they always connect AFTER the carb and will store gas and 2 stroke oil mix
those tanks are called boostbottle. When implemented like this, they areuseless or even harmful. it gives more space after the carb(butterfly valve), and is suppose to resonate with the frequency of the engine and make the air/fuel mixture stay behind the valve.HOWEVER, this needs to be tuned to the engine and the carb. simplly add a random length of tubing with a random volume of tank, doesn't do anything, and may even hurt the performance. From you slow mo, it can clearly be seen that fuel is still spuing out of carb into the air intake side of the carb,which means the boost bottle is useless or even harmful
that is 100% correct, much like an expansion tank
I loved this video. Very satisfying to see the metal melt and flake off and the destruction that followed. The slow motion was sweeeet!
Always a pleasure watching things fail in slo mo 🙏🏽 Keep up the awesome content.
I've known about these clutches since I was a kid but I never realized how durable they really were
This was pretty cooln never knew a clutch like that existed actually, kinda a genius invention for small racers like that go-cart. 2jz engines are not known for making good power stock, (they make like 180), but theyre known for their strength, that block can take a massive beating without blowing up thats how people get 1k horses out of them.
220
The 2JZ is known for being g able to make massive power jumps without the block grenading, as well as its ability to handle higher RPMs(potentially hitting 12,000 at times). Plus, it's not a V-tech.
@@Deathbomb9 you said they make 180 unless you don’t use horsepower the naturally aspirated engines make 220 and the turbos make 330. and of corse it’s not v-tec it’s toyota tech not honda. and in theory if built correctly a 2j could have a vvt system which is all v-tec really is
sorry not you but the op
@@losh7489 all good, yet, a VVT isn't needed for a 2JZ to pass 8,500rpm. They will push 11k-12k and be just fine, all you need is an improved cooling system and the right trans hooked up to them. Also have to reprogram the ECM. And you're right about the horsepower. The old skyline engines were the ones making about 183, but that was also before what we know today as the skyline. We are talking the late 1980s skylines.
The slow motion footage was SO tasty, like the very best of big budget cinematic trailers. Wow!
Are we not talking about the amazing brakes😍😍
6:45 those two metal bottles are called "boost bottles" they connect to the intake manifold and basically increases the pressure of the fuel/air going into the engine creating more power
no its only to catch the air fuel mix getting blowing out the carb before the reeds close and have to be above the carb ore it will fill whit petrol if upside down and at 7.15 secs you can see whot its supposed to reduce fuel spraying out
4:58 Spring: "piece of metal, where are you going? Come here!"
no one is gonna talk about how beautiful the high speed camera footage looks?
it looks fantastic in my opinion, almost fake
People do this to rental equipment all the time. Buts it's still fun to watch thanks man!
Seeing the mill scale start flaking is awesome
“That was painful I almost cried”😂
7 mins in he says it got my finger LMFAO I'm cracking up, u made my glass eye giggle too
@Captain MufDyven well he's missing a finger on his other hand that's what makes it's even funnier
@@davidmoore8741 do you guys know how he lost it?
@@arthurx333 dog, when he was a kid
The two tanks are "boost bottles" as others have said.
Their effectiveness is questionable but the idea is that, in a piston ported engine like this, when the piston skirt closes off the intake there's a flow of air through the carb that gets stopped. That flow has momentum. The boost bottles give the flow of air somewhere to go (into the bottles). As the piston goes back up and opens the intake up again the air that flowed into the boost bottles should be getting released back into the intake to be fed into the engine.
Essentially they're supposed to help increase the volumetric efficiency of the engine a bit.
There's a formula to how they should be sized to get the resonance right.
I don't think there's any solid evidence they have more than a negligible effect on power.
First time I've seen these things but that explanation makes sense, as well as your observation that their effectiveness is probably negligible, as like a tuned pipe (I flew models years back), the length to RPM ratio is critical and very specific. I know in the bigger two stroke world (bikes, ski's, etc), engine designer are always doing their best to get RID of narrow peaky power bands. Maybe these would work with control line speed models?
Thank you, I couldn't find a answer via Google since I didn't know what they were called.
That slow mo was epic.
To me you're like a war hero who lost his finger for the purpose of a greater value! WOW. You still doing the same high-risk jobs is incredible. I wish I had a portion of your courage.
I'm pretty sure I can see into the future in those glasses bro...
That being said... these videos are F'N awesome! Keep it up!
Thank you
Could you look at the exhaust side of that two stroke engine in slow motion?
that screw on the second engine was just like "nope, im not going to be a part of this"
This gives a new meaning to popping your clutch
3:56 there is something beautiful about that slow-mo with red hot metal and mechanics running at the same time.
TH-cam: "hey, do you want to watch some disk melting"
Me: "nah"
Also me: *click it anyway
The "super charger" is compressed air and pushes more air in to the engine to make it go faster
not compressed air.. just boost bottles.. they are supposed to stop fuel/air mix from passing the main jet twice..
You know, I am a complete moron when it comes to mechanics. Especially engine mechanics. I hear clutch on a regular basis, and have no idea what it does. Just that its mechanism can somehow do something important for a car to move. Seeing the explanation of how a centrifugal clutch works instantly makes it click. Just that design is so intuitive to understand, compared to other mechanical nonsense that flies straight over my head.
hey my car does not have a clutch so haha
this guy is like a better version of a physics teacher am learning from this guy God bless you man
Perfect music; I love the slow mo as the ring becomes elastic just before the break.
7:55 - Maybe not the best idea to look that closely while it's still spinning, in case the spring detaches and flies into your face!
Surprised you didn’t mention when the lower left bolt holding the “bell housing” on the two stroke walked itself out and scooted across the table.
I know that was funny
Warped Perception it was all like F this, I’m out.
I shared this video to my professor and this is what he replied, "Imagine the amount of heat generated that the chromium steel clutch shoe gets red hot and 5160 spring steel gets molten, at least 2500°C. Just don't replicate it yourself if you value your life at all."
Theres tons of channels doing this type of content yet i always find myself watching wp
This guy is so easy to watch
Thanks this really helped me understand how a centrifugal clutch works
Clutch went supernova. It grew in size at extreme Temps and then blew its outter atmosphere, just leaving its charred core behind (no black hole sorry lol)
I would love to see this with a scooter engine with the drive belt, at least 70cc or more (2 stroke only)
I've always wanted to see how the belt looks like in slowmo, in pretty sure its vibrating
agreed, 50cc would be enough already though.
@@-NME I suck at English and will sound retarded trying to explain some parts on a scooter moped.
But I recently change the variator belt bcs of wear, I have a 70cc Yamaha neos stuntkitted owned for over 4 years now since I was 15.
And the pressurespring in the rear if the engine block can cause lots of heat if it's too hard. Also if it too soft it will be extreeeeemly hot, and I do believe when my neos was almost original except the variator, and the pressurespring I did change belt really often
@@ramo1484 I work on scooters all the time, sometimes the clutch bell changes to blue colour becouse of a lot of heat
@@mate7255 Mine is upgraded 👍🏼
@@ramo1484 I have Baotian 4T 50cc upgraded to 72cc Naraku, big camshaft, carb from a 125cc 4T, Im running a stock variator with 6,1 Malossi rollers and stock belt, stock clutch with Naraku 1000rpm spring, and I also have a chinese open exhaust for better flow, scooter runs perfectly and has power like a 125 4T
I never knew you was missing a finger until this video.
Just noticed that.
Me too... wonder how he lost it? Has to be something to do with engines.
Same
He donated to science. You know, for research purposes.
@@danielbrowning6980lol
I know how these thing works, but its still so much fun to watch, plus slow mo camera hell yeah.
Looks like a super cool loading screen
I wonder how good your motor would have done if you wouldn't have torched most of the clutch housing away. I'd love to see you put a brand new MAX TORQUE on there your brake probably wouldn't hold
such beauty in destruction...
It's the beauty that killed the beast...just done watching skull island
Diesel engine: Oh? Clutch slipping? I don't care.
Trying to tell someone that things like this happen but they visually can't see it/ picture it in their own head. It's nice to see your videos showing it.
That unhinged spring flying around at those rpm's is hella dangerous! A centrifugal clutch blew apart in my hands once when I was young and learning about them. It was a weed-wacker that I was tearing apart for a gas powered skateboard build. Anyways, all 4 pads and the spring flew past us and dented the walls/cealing! We where so lucky that they didn't hit any of us in the face or something like that. Scary memory.
Oh yeah, they have a lot of force, especially when spinning that fast. In this case I had a blast shield just off camera and I was standing off to the side. I also conducted the final failure when I was there by myself no one else was around, I was too worried when the girls were there earlier in the day. But yeah I had a blast shield just off camera. Glad you didn't get hurt, those clothes calls are how you learn unfortunately.
Honestly, if the chain wasn't there and the clutch was just about to fail that would've made an amazing background. But eh, what do I know? I'm just an idiot on the internet watching this at 10pm with schoolwork to do. Still great.
did you finish your homework before the deadline?
6:40 Those Tanks are full of pressurized air. That's how they are counted as a supercharger for that engine. They pump more air into the cylinders.
They don't pump anything. They add volume to the intake manifold.
Any1 else notice he ran the 2 stroke on straight gas? lol.
I approve of all the captions. They embody my thoughts and feelings very well. Keep captioneering!
aside from these..you made some great opening vfx from that burning-clutch part. looks CGI-ish..awesome
Bro that could have been a loading screen to a madmax game, 100%. It was awesome to look at.
5:19
Gearboxes and Clutches:Exists
Kohler engine:So you have chosen death...
7:08 sounds like music in my ears
And the subtitles agree with me
I find myself wondering if I should trust a guy with his finger missing
I've never seen a N/A diesel or 2JZ engine that impressed me.
That clutch was badass. Im more confident in my 212 homemade motorcycle project now lol
Time to cross section a tank to see what it’s all about? 🤔
I kinda want to see what happens inside a lawnmower. Think you can make it happen?
I know about destin's video, i mean to put the camera INSIDE the mower, or cut a camera-sized hole in it and put the camera in the hole to not mess up the airflow
Inside the deck? Or engine? Cause there's a video of the inside of the deck on the tube, I've watched it. It's not his video tho
Look up project farm. Youll love it trust me
Destin at smarter everyday did see through lawnmower deck. Or maybe it was slo MO guys. It was one of em.
@@joshuagibson2520 I dont mean "open the deck and look inside" i mean put the camera _inside_ the mower
yeah smarter everyday is pretty awesome
That motor is male, having two "tanks"! 😅
There is pain in the making of this video salute you 🙋♂️
HOLLY COW that first one where the bell housing came off was freeking awesome man. Yet another brilliant video