The TRUTH About TURBO FLUTTER

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JK Fab

JK Fab

Күн бұрын

Пікірлер: 21
@Dan-uh9jy
@Dan-uh9jy Жыл бұрын
Thanks man. You've convinced me to disable my diverter valve and go for the flutter. I've always loved the sound but was slightly worried about causing damage to my two turbos. All the best, Dan
@HahTube
@HahTube 20 күн бұрын
Car community needs to see this
@jdm.flair2020
@jdm.flair2020 Жыл бұрын
Very nice video. Thanks for the explanation. I always didnt want to believe the turbo would get damaged from fluttering.
@BigBenlolz
@BigBenlolz Жыл бұрын
Its sad that this topic still needs explanation and I STILL see in comments everywhere, people even using flutter and surge interchangeably. Thank you for your contribution, although stupid people will stay stupid sadly.
@X85283
@X85283 29 күн бұрын
A recirc is important for a MAF system, but it doesn’t help you keep boost. The intake side of the compressor will immediately compensate for air vented to atmosphere.
@MrCreed10
@MrCreed10 Жыл бұрын
Ah! Makes sense. Definitely wasn't the first time you've explained that. haha. Well said.
@jamesgriffiths7536
@jamesgriffiths7536 Ай бұрын
Just a thought From a physics standpoint point Could the air pressure go above the 10psi as the turbo is still spinning while the space is closed off so would the psi and back pressure be climbing and putting the turbine under higher loads of inconsistent pulses from the system that is backing up and creating more than the intended psi
@stickerman2328
@stickerman2328 Жыл бұрын
Good explanation. Loved the video
@Commerce-Suite
@Commerce-Suite 3 ай бұрын
I don't have experience with running a turbo with flutter, but it isn't quite true that the pressure within the intake remains constant after lifting off the throttle. When the intake valve shuts, the remaining momentum driving the turbo will allow it to continue pushing air into the intake and the rapid action of the air hitting against the valve will cause a pressure increase. This can also be proved by thinking about blow-off/diverter valves. They open under a certain amount of pressure and the also open only when you let off the throttle. If the pressure remained constant, the valve would either always open or never open. With that being said, I do believe the main failing point of turbos are high boost levels rather than the absence of blow-off/diverter valves.
@ThisRandomUsername
@ThisRandomUsername Жыл бұрын
Nice explanation. Could you do a video on how to read turbo efficiency maps? Also isn't 150k RPM quite low for a petrol engine turbo? Is it only the small ones that go above 200k?
@JKFab
@JKFab Жыл бұрын
There’s a few good videos out there regarding that already but I’ll consider making one in the future. Generally most turbos operate between 80k-100k. Only small turbos operate in the range of 100k-200k rpm. Garrett BB cages are rated at a maximum of 150k rpm, upped to 180k rpm on the G series.
@sspoelma
@sspoelma 5 ай бұрын
Here's a quick question you maybe can help me with: I have a Suzuki Alto Works and have blocked off the diverter valve. Turbo flutter was fantastic. Now it has stopped fluttering. I looked for boost leaks, cleaned the TB and PCV valve, checked all my hoses. It is very difficult to check play in the turbo bearing because of how small and hard to reach (only possible to get one finger on it so can't pull in/out) but almost zero axial play, spins freely. No flutter. Boost seems off but not very much (stays at 1 BAR rather than spiking up to 1.2/1.3 bar and coming back down to 1 BAR) still runs very strong--if I didn't know how it sounded before and what the gauge was reading before I would not think I had a problem. Maybe I don't, but I miss the noise and I wonder what happened. Weak wastegate spring? I disconnected the vacuum hose and capped off the upstream side and it made LESS boost, by a lot. Is the wastegate the "problem"? Could worn bearings allow the air to pass by the compressor wheel with less noise? I'd be interested in what you think.
@X85283
@X85283 29 күн бұрын
You’re wrong. The axial force on the compressor with a blow off valve or diverter valve is always in one direction. With neither pressure relief, When the compressor wheel stalls and air is forced out past it, the axial load is momentarily reversed. It is probably not catastrophic but the turbo is also most likely not engineered for that load. I don’t think it is a huge deal but it’s not wild to think it may have some effect on bearing life.
@silviaendings6665
@silviaendings6665 Жыл бұрын
Very informative thanks man.
@corneringperformance4432
@corneringperformance4432 Жыл бұрын
Very good and clear explanation, Which system keeps the tubo shaft rotation speed the highest when you lift off throttle?
@JKFab
@JKFab Жыл бұрын
Great question but the answer is a little more complex than you’d think: A diverter valve will keep shaft speed the highest but it also releases all the pressure in the system. No BOV/DV would have less shaft speed but may respond more favourably in instances of fast off & on throttle due to keeping the system pressurized the longest. In short - diverter valves retain highest shaft speed whilst no dv keeps pressure in the system the longest (reducing charge up time)
@Skelturoth
@Skelturoth 9 ай бұрын
audi TT 8n 1.8T 20v used to have factory blow off ^^
@Stiefe300
@Stiefe300 Жыл бұрын
Well i drive my mk3 supra also diverter valve deleted and i also believe that the no load Turbo flutter doesn´t really hurt much the turbo. But i disagree on the point that the pressure stays constant when the throttle closes. Yes the flutter ist created because the turbo is no longer moving huge air masses, so you get to the surge line(or beyond that), because high pressure and no air mass. My take ist, that the turbine wheel still has its full rpm and momentum, when you go of the throttle, so that you increase the pressure to the maximum point where the compressor, with its current rpm can take it. So the pressure peaks. Would explain how i exploded 3 oem throttle rubber hoses. (replaced with silicon and never happened again)
@DeYmOKits2871
@DeYmOKits2871 Жыл бұрын
great video bro but i love the flutter and if my turbo its gone i buy another turbo jajajsjajsjsjsjssjs and continue fluttering it c:
@walterolveda7319
@walterolveda7319 Жыл бұрын
Is this true by: turbosmart. Turbo Flutter is Harmless? In short, flutter is the sound of a turbocharger trying to push air. However, failing due to closed throttle. Therefore, it dramatically increases the load on the bearings of the turbo. If it occurs at higher engine loads or boost levels, it can cause premature wear to your turbo.Oct 26, 2021
@baltod4978
@baltod4978 5 ай бұрын
What product does Turbosmart sell?
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