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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 11-16-2014, 01:25 PM   #29
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The sound starts at 5sec and continues from there
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Old 11-16-2014, 01:27 PM   #30
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Any possible solutions to stopping the noise? And ids it bad?
Dude.. what exact noise?? If it's the one that starts at :10 and gets worse over 10 seconds or so, then that is far far far from normal. I assumed you had the window down and that was the wind If you are talking about the wastegate flutter at :06 then that is normal.
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Old 11-16-2014, 01:28 PM   #31
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Originally Posted by shif7i7down View Post
The sound starts at 5sec and continues from there
:05 until .......? Because the noise that starts at :05 I only hear for a few seconds and seems normal, and then a completely different noise starts at :10 (which I thought was the wind, but if it's not then you should stop driving the car.)
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Old 11-16-2014, 01:29 PM   #32
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Dude.. what exact noise?? If it's the one that starts at :10 and gets worse over 10 seconds or so, then that is far far far from normal. I assumed you had the window down and that was the wind If you are talking about the wastegate flutter at :06 then that is normal.
Window is not down. The noise is allot more noticeable at the 10sec but it starts at like 5-6sec in the video. I'm not sure how to describe it. But it does sound like the video that Mike posted
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Old 11-16-2014, 01:30 PM   #33
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Originally Posted by shif7i7down View Post
it sounds like air is being released while i'm boosting, you can hear it kinda like a hissing/popping noise. it starts at around 6 sec, and it does sound like it's the wind, but it's not.. that's the noise i was talking about.. -_-. Im in the car with the windows down.

you can hear it whining up and then it slows down and speeds up again, sounds kinda like a engine trying to crank O_O..

edit: it's the sound that sounds like static


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There's no wind, the window it's closed so I'm not sure that youre referring to. The chattering pulsating sound, which sounds like air is being released it's what i was talking about. It sounds Kinda like tires chirping but it's the coming front the driver side. Of i had to guess it sounds like it's coming from somewhere near the brake booster
You're making this impossible to diagnose. What EXACT timeframe are you referring to, and are the windows UP or DOWN?

Who did the install of your turbo?
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Old 11-16-2014, 01:41 PM   #34
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With my headphones on I hear your BOV going crazy from 0:06-0:26. This is not normal, and why all Turbo applications should have a boost gauge. Somethings wrong, you should have it checked out.

*deleted rest to avoid confusion.
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Old 11-16-2014, 01:45 PM   #35
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With my headphones on I hear your BOV going crazy from 0:06-0:26. This is not normal, and why all Turbo applications should have a boost gauge. Somethings wrong, you should have it checked out.

I think your wastegate is stuck closed, so once you reach boost, you continue to build it while your BOV continues to vent it. This turbo "surge", if thats what it is, could destroy your engine.
That's not how a BOV works.. and if the BOV was open then there wouldn't be turbo surge. The BOV has a spring that keeps it closed under vacuum. When the throttle closes, the pressure in the intake pipes is higher than the vacuum in the manifold so it pushes it open. Turbo surge would kill the turbo, not really the engine.. unless the turbo completely failed.
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Old 11-16-2014, 02:06 PM   #36
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That's where I'm confused, it's either the bov or the Wastegate
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Old 11-16-2014, 02:06 PM   #37
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That doesn't sound like wind fluttering, almost sounds like flapping but I'd be inclined to think there's something wrong with the turbo itself. The BOV is driven off pressure difference between pre-throttle body and manifold pressure. The wastegate is driven off boost pressure. That sound when you let off is very unusual. Nothing should be causing the BOV to flutter though.
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Old 11-16-2014, 02:14 PM   #38
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It's not the BOV.

Does it happen if you are cruising at higher speeds, not WOT?
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Old 11-16-2014, 02:21 PM   #39
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Rev it parked, with hood open, and see if you can locate the sound.
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Old 11-16-2014, 02:30 PM   #40
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If your turbo is fluttering, that is very unhealthy for the system. As we (presumably) all know, flutter is caused when throttle is shut and air is caught between the free-spinning turbine and the closed throttle..
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Old 11-16-2014, 02:36 PM   #41
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If your turbo is fluttering, that is very unhealthy for the system. As we (presumably) all know, flutter is caused when throttle is shut and air is caught between the free-spinning turbine and the closed throttle..
You can hear the BOV open and you can see in the log that it works, so its not compressor surge.
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Old 11-16-2014, 02:42 PM   #42
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You can hear the BOV open and you can see in the log that it works, so its not compressor surge.
Oops. I totally viewed that video posted by Mike&Ike. haha
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