How Turbocharger Wastegates Work - Internal Vs External
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- เผยแพร่เมื่อ 21 พ.ค. 2024
- How do turbochargers wastegates work? What is the difference between internal and external wastegates? Is an external wastegate better than internal? What are the advantages of internal vs external wastegates? Why are wastegates needed in turbocharger applications? Wastegates are essentially bypass valves for exhaust gases to reroute around the exhaust turbine in the event that a peak desired boost is reached to limit the amount of boost an engine creates. The wastegate can be internal to the turbocharger housing, or it can be external. Internal turbos are great for OEM applications, but external wastegates allow for more flexibility with the overall design, and can result in a more productive turbocharger as they can route the exhaust gases further away from the turbo housing.
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Simple but informative. I am in the process of upgrading the turbo on my car right now and just swapped over my wastegate last night to the new turbo so the timing on this is fortuitous because everything you are illustrating is what I'm seeing up close and personal right now.
I love this channel. The enthusiast car community desperately needs real, hard technical information like this that explains how things in cars work. The amount of ignorance you find from armchair experts is astonishing. You're filling a very real need with your videos.
dude I use you as like a free college 101 course your videos are amazing
You should include some waste gate sounds for those who aren't aware of the sound.
+Scott Koenig Wastegates don't really make a sound, it's pretty much just another exhaust.
Yes, it is just exhaust.... but wastegates/blow-off valves have a very unique sound. A rush of air, a tweet, a woosh.....
Scott Koenig Wastegate's and blow off valves are two different things, I would think after a video explaining how wastegates work people would understand that.
+DriftNick after some research, I stand corrected. 😬
@@JapanScott1 No u dont
Your videos have come a long way since you started. this is a good example of that progress. keep it up!
Absolutely wonderful videos! I've learned so much about cars, both for everyday use and for the fun of knowing racing applications. I love how far you go into detail (even though you sometimes go crazy with it like the lap time calculations.) So far I've been able to gather most of my knowledge in the books, but one day I want to take that further and make my own projects and learn the actual practice of working on and tuning cars.
Internal wastegates can also often lead to boost creep if the turbo turbo size is increased or the boost is raised with a boost controller. External gates are almost always the best option for mild to heavily modified cars.
Hello fellow N54 owners
Still got it?
@@ZORGONICAL I'm never going to sell this car at this point lmao
That's the best explanation about wastegate I have heard. God bless you Sir.
I'm an engineering student.
I appreciate your videos. I can always count on a better understanding on anything I'm watching about.
I absolutely LOVE learning more about engineering. Thank you!
Sir, I appreciate the intel you provide. I have learned a great deal from you and I am grateful for the help. Keep up the great work!!
Awesome being able to go back years and get sound advice from my most trusted engineer, thanks buddy 👍😛
Very helpful, crisp, and succinct explanation - thanks!
another great video from one of my favorite channels.
Thanks for an excellent video. Right on point, no side tracking, very understandable, precise.
Hi, I have 2 requests for videos that you could make.. :) timing chain vs timing belt and distributor ignition wires vs coil on plug.. I would like to know the pros and cons ,thanks
for the first one, theyre pretty much the same except a chain is way noisier, and last longer since a belt can snap
farerse Okay first of which the elastic limit on a timing belt is a lot better in high rpm. A chain is more durable and will stretch out of ignition timing when it gets worn out. a timing belt can snap and your valves can hit the pistons. Distributors are mechanical and spin in a circle like a eight round revolver firing on each piston and is usually vaccum advancing itself as the rpm rises for a better ignition timing in a higher rpm. A coil pack is computer and electronically fires for ignition timing and the ecm advances itself electronically. Distributor is mechanical old school and better simplicity than the coil pack. Price wise all depends a coil pack on some models is one part and is usually cheaper than a distributor and ignition coil. some models have multiple coil packs.
JBMSTRIKER71 Coil packs are definitely better than a distributor.. No moving parts and it's controllable through the ECU
@@TTime685 IMO the coil packs last longer, but not necessarily better, the distributor can handle more fire, deliver a quicker spark in some cases provided, you have the right kind of plugs and wires, but they don't last as long as a coil pack, now seems like all manufacturers are using coil packs now a days as that's the whole purpose behind the platinum spark plug as you can go 100,000 miles straight out the factory doors before a single change, but if you want rapid fire the distributor is the way to go.
this guys is awesome, like fo real. always helps me out when there is stupid videos out there that doesnt even explain what i want to know. THEN i go to this channel and after 5 minutes i know EXACTLY what i need to know, sick. thx alot man
Hey I'd love to see a video on sizing turbochargers, A/R ratio and all the math that I'm sure goes into it.
Yeah Id second that. I would love to know how to size a turbo for specific boost on different sized engines
Yup I would love to see that too please. Can you include diesel calculations too?
Best ever series of enginering vidos will continue to use them in my classes
I love your 4K videos. Keep em coming. Your videos have cleared up a lot of stuff for me that wasn't making sense for me. I'm upgrading my Evo X turbo, and I'm trying to decide which route I want to take.
great video man, I'm always learning something new!
+Engineering Explained, I'm not a certified engineer, just an experimental fabricator, but I like your videos, you take the time to explain things without fast speech/mad gab/ancronyms like other TH-cam personalities. So I enjoy watching, and learning from your videos.
hi. i like your uploads. very informative . keep up the good work. cheers mate!
great videos! You can explain exactly the point, no confuses in your words. Sub from Portugal.
Thanks!
great video, explains it without getting crazy technical
This brings me back to my dodge srt4 days! Ppl would either replace the wastegate actuator with a stiffer one (to hold boost better) or put a preload on the spring....Some stock wg actuators allow you to adjust preload of the spring...This is essentially compressing the spring in it's "resting/closed state"... Making it tighter/stronger (preventing the wg from opening as easily)... Which in turn allows the turbo to make more boost or hold peak boost longer. Interesting stuff for sure.
Great explaination, as always! ;)
Learning so much man. Thank you:)
Congratulations! For making it on 1320 Video, and Car Buzz!
+ghettoflyer Awesome!
that was excellent ! fast , clear and understandable ... thank u
Thanks for the explanation!
Awesome Explanation !
Great and informative video, thanks!
Such a great job explaining this. Thanks.
Very informative thank you I truly do learn from and enjoy your videos your wisdom enlightens us all :)
Nicely explained, thanks.
Great explanation!
Fast and simple, nice!
Excellent video, short well explained and to the point. (Best of all it's about the subject and unlike so many other youtubers you keep your ego at bay 👍)
Most kids in the car scene in my area set their wastegate at a much higher psi for more boost = blown engines. They try to race their car with turbo with stock internals and it doesn't work out for them... wish they would see this video haha. Thanks for further in depth explanation!
extremely helpful!!!
Thank you bro for the explanation :D
Very well explained!
Great video.. i was searching for an explanation and you my friend have explained it very nicely..😌😌😌
Subscribed.
Awesome explanation!
Thanks!
Nice explanation!
Really worth video. Thank you very much
Thank you for your effort and time, very useful video
good breakdown
Very well explained, thank you 👍🏻
I'm not sure if it's been mentioned yet, but a video on boostcreep and boost spikes would be helpful. Bascially boost issues turbochargers can have for one reason or another.
Thanks for the knowledge I thought the difference between internal and external was how you vented the waste (in the exhaust vs straight to atmosphere).
I think a little addendum is needed to clarify the terms wastegate and blow off valve
Awesome explanation and video
Perfectly explained
Aw man I finally found a video I can understand. Hell yea
awesome work buddy
+Be Yourself #Motivation keep on doing
Love your content bro
great explained
Really good video!!
Good stuff. Thanks!
Thanks....it was explained nicely
This mic is much better than the one used in twin scroll turbo charger video. I came straight from there.
Would be great if you did a video on what an ECBS does and the advantages of 3 port vs 2 port.
hey jason, would you consider making a video on the triflux system?
nice channel, btw!
I really enjoy your educational videos
+Troy Onufer Thanks!
great video
Suggestion: how about a video on how different induction methods are impacted by increasing altitude?
Phos9 you have to retune cars if ur in colorado
Higher altitudes have lower oxygen density. It’s kind of the same reason a human who’s lived in parts of the world where they are closer to sea level, they have to adjust to higher altitudes. There’s less oxygen the higher you go. I hope that helps
Just realized this was 2 years old oof
@@dezv4736 if you have a turbo you most likely have some ecu you need to lessen the fuel
Nice video thanks
Aye a nice quick one
Thank You
DAMN EE BACK AT IT WITH THE GRAY HAIR
Thanks for posting this. I was recently wondering why the Bisimoto 930 Twin Turbo had what looked like an extra pair of smaller exhaust pipes. He must just be dumping the wastegate exhaust into the atmosphere. I wouldn't have figured that out without your explanation.
You are just so good at auto mobile engineering
broo thks alot !!
Aww was waiting for the famous pressure plate and friction disc to make an appearance was disappointed :( Joking aside great video and explanation as always man!
Awesome videos!
I wish to run a twin scroll (it was free) on a small V6 by splitting the exhaust to the turbo. It's not the most efficient set-up, but it's easier and cheaper than a "bag-o-snakes" header system.
Research shows that I need to use two wastegates.
Couldn't I run one wastegate of it is Tee'd between the exhaust pipes?
Or does the Tee cancel the split to twin scroll idea in the first place?
Also having an external wastegate venting to the atmosphere, the sound produced when it opens sound awesome. Internal wastegates doesn't give you that screaming sound.
5 years later... you can now buy external dumped down pipes lol
thanks this made sense
That explanation was a little bit fast for an Asian who doesn't speak English daily like me but the diagram was pretty helpful in many ways ( of course, your words too ). Thank you ! :)
I don't know much about turbos and always wondered what a wastegate was. I guess it is essentially just a pressure relief valve and a way to control the boost pressure? Thanks for the info.
+Nick DiBartolomeo yes that's is exactly what it is :)
Nick DiBartolomeo yes and no. it doesnt bleed off boost pressure, it reduces exhaust pressure to slow the rotating assembly down
usually pressure relief implies that the pressure it's relieving is the same pressure being controlled.
Melody Absolutely correct!
Can you please make a video about what happens when you put a car on a dyno in different gears? For instance, a 2k to redline run and how torque and horsepower change when the car is in 1st vs. 5th gear?
Really? So let's say I put a 200hp/200tq car on a dyno and do a redline run in 2nd gear which is 2.000:1. How would that change the dyno chart?
The_Bait So would the chart show 400hp/400tq or 200tq/100hp?
+VoraciousPhantasma your choice of gear does not change anything in the final numbers. Power = Torque * angular speed. If you change gears, both of the numbers change, so the power stays the same. Of course different gears have different efficiency, meaning that there is always power loss in the transmission, and the amount of power you lose is different in each gear. But that is why the dyno measures your power loss right after the run, so it can compensate for it and calculates the power at the crankshaft. (That's why power at the wheel is always lower than power at the crank).
There is an other thing, which is that if you are in low gear, you have really high torque at the wheels, so you risk "jumping out" from the dyno (yeah, I know the cars are strapped down, but not always, and that's the reason why you don't have to strap down cars with low power figures), but the real issue is that the tyres may slip, thus giving you false information about performance, but more importantly, you cause tyre wear and dyno roller wear.
Agreed +davidsunhun. You are simply changing the gear ratio from the engine to the transmission, not the final numbers
I would have thought that it would be beneficial to have the bypass valve operate as much like a switch as possible, either fully open or fully closed but not partly open under pressures below the target boost threshold. However the pneumatic actuator/spring design seems to imply that the amount the valve opens is linearly proportional to the boost pressure, have I missed something? Also what are the advantages of using a diaphram over a piston? It would seem to me that a piston would be more reliable, is it just down to cost?
Hello I was wondering if you could do a video explaining the comparison of a bellmouth downpipe and a divorced wastegate downpipe. Thank you!
One of the other things for controlling external wastegates is since they have vacuum ports for both the top of the diaphragm and the bottom you can literally put just an 8 psi spring in and then buy a boost controller and running much higher numbers so you have the tune ability anywhere in between that.
Also open wastegate dump FTW !
great simple explanation.. if you haven't already done a couple of flat plane v8 / regular v8 motor explanations or examples could you please thx
thank you
I want to ask you if you have experience in cantera, I need help
Hi my name is Alex Dooley and I love your channel on TH-cam it's awesome and super helpful! I have a question about wastegate and blow off valves. Is their a difference and if so is it bennificial to use both? I'm in the process of turbo charging my motorcycle and I'm worried about being in the higher rpms 12 - 14xxx and then letting off of the throttle. I don't want to keep all that pressure in the charge pipes or the turbo and I definitely don't want it to hurt the engine or the turbo. I will only be pushing around nine lbs of boost. Is their any tips or what do you recommend as far as blow off valves and wastegates?
How do we decide wastegate sizing? Usually someone just goes "you need this size."but is there some specific reason to go for a certain size? how do you know the flow required vs wastegate size?
+sadakotube It depends on what amount of boost you think is acceptable, or what your engine components can handle.
+BmanUltima was hoping to see the math or rationale behind it from Engineering explained
sadakotube It's all engine specific, there's not one explanation.
Another great video.
I know the whole idea of a wastegate is to prevent compressor stall, however uneducated me always thought the wastegate was on the intake side.
Closed throttle creates an overboost scenario and the compressor stalls cause it cant pump any more air into the intake cause it has nowhere to go... hence my thought of the wastegate being there... This would also keep the turbo spooled up. Is this possibly how wastegates work in certain applications?
Would a waste gate on the exhaust side not just result in the turbo spinning down because there is less flow over the turbine?
Ur a beast don’t forget that sir 🎉
I got your notification and dropped my phone now my phone is cracked. However EE do not worry I too am an engineer I'm ding some calculations to see how empty my wallet will be.
+ThenamesJonny Thanks man, your comment/fumble made my day lol. I'm about to upgrade so you can have my phone & lower your calculations.
+TheNamesJonny Really sorry about that! Shoot me an e-mail and I'll buy you a case for your current (or next) phone! :)
+Engineering Explained that's legit!!!!!
+Engineering Explained Well in that case...I dropped my nismo gtr...
if it's just the digitizer, it is easy to replace, I just replaced the charge port on my phone now it charges like normal again
Hello Jason. I think it would be nice if You make a video about blow off valve, usage and how it works. It would be a nice to watch in addition to this video. I know that out there already may be other videos that explanes blow off valve, but not in your unique whiteboard style :D
This popped into my head while I was watching the video, but do they make waste-gate values that are not passively pneumatically actuated? For example would it be possible to create an electro-magnetic waste-gate that can be controlled via a computer from inside the car, allowing for different settings, ie: a higher PSI that would create more power but also more stress on the engine for racing or sport-mode applications and a lower PSI option that would be used for daily driving? Thanks, and great video as always.
+Will Argus Well, a boost controller is a bit different in that it's not really an electronic wastegate, but you can buy electronic boost controllers that change the pressure that goes to the pneumatic wastegate. The functionality is the same as you've described however
You explain things really nicely and simple. Can you explain the differences in the sound with turbos when releasing acceleration? How it's caused? Some make the fluttering noise, some make a normal air release noise. What's the pros and cons in these setups?
that depends on the bov (Blow off valve) hks sqv series are the most knowned for the flutering
+Nitrxgen When the throttle plate closes (when you lift off the throttle) and there is no bypass valve or blow off valve the boost goes the only way it can which is back out the intake and over the compressor blades making the flutter sound, different turbos and intake designs can change the sound a fair bit to, best you could do is search on youtube for videos of flutter and the hks blow off valve to hear the difference as it's kinda hard to explain the sounds.
Bravo
Hi, always enjoyed your videos, just have one question, I've recently bought a 2015 Suzuki Alto RS Turbo AGS. I bought this for my wife so would be easy for her to travel to work and back rather than me doing the driving for her up and down. This is a tiny car with a very tiny engine (660 cc with a 64PS). It has a very small (smallest I've ever seen) inter-cooler and a turbo, I was just wondering if I could fit a waste gate for this (i always enjoy the sound of the waste gate). Would that be practical for a such a tiny engine and a turbo? would it lose power or awesome fuel consumption it already has? I am pretty new to turbo setup, i've always played with NA engines. Thanking you in advance for your reply.
Hello Jason. My wastage rattles around 2k rpm. How could I fix this? Is the actuator arm supposed to have play in it? or is it the inner valve rattling? I own a golf mk7 1.4 tsi
Thnaks
Dude.. thanks
are those new markers?
because they show up very nicely in the video
I do have a question. what makes that cool noise of turbos after letting off the throttle? is it the excess gas in the hosing exiting or is it because the sudden drop of turbine RPM?