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09 cobalt turbo flutter (vid included)

08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

09 cobalt turbo flutter (vid included)

Old 01-15-2019, 01:54 AM
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09 cobalt turbo flutter (vid included)

my 2009 cobalt ss turbo with a k&n drop in and stock bpv has a lot of flutter when I let off and I just wanted to make sure itís normal, I donít have any flutter while on the throttle just when I am off the gas, just wanting to make sure this is normal
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Old 01-15-2019, 07:32 AM
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as long as it's off throttle don't worry about it to much. It sounds like the normal bpv letting air out, but it's hard to hear it really well on that video.
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Old 01-15-2019, 10:36 AM
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Originally Posted by ECaulk View Post
as long as it's off throttle don't worry about it to much. It sounds like the normal bpv letting air out, but it's hard to hear it really well on that video.
okay thanks, just wanted to make sure it wasnít surge
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Old 01-15-2019, 10:45 AM
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Originally Posted by [email protected] View Post

okay thanks, just wanted to make sure it wasnít surge
When surge happens at full load it is a problem, otherwise don't worry about it.
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Old 01-15-2019, 11:03 AM
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Originally Posted by ECaulk View Post
When surge happens at full load it is a problem, otherwise don't worry about it.
okay, in the near future Iím going to get a forge bpv
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Old 01-15-2019, 11:37 AM
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The forge wont really do anything to prevent flutter if anything it only changes the sound
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Old 01-15-2019, 05:53 PM
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Originally Posted by Snail_SS View Post
The forge wont really do anything to prevent flutter if anything it only changes the sound
I kinda want my recirculation sound to be louder but I donít want to have to spend the money on a chargepipe and bov so hopefully the forge bpv will tide me over till I can afford a bov
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Old 01-15-2019, 05:55 PM
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Originally Posted by ECaulk View Post
as long as it's off throttle don't worry about it to much. It sounds like the normal bpv letting air out, but it's hard to hear it really well on that video.
I have another video of when i had my phone under the hood to show my buddy, I could upload it if this one isnít loud enough
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Old 01-15-2019, 05:59 PM
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Originally Posted by [email protected] View Post

I kinda want my recirculation sound to be louder but I donít want to have to spend the money on a chargepipe and bov so hopefully the forge bpv will tide me over till I can afford a bov
Get an intake, that will make it way louder
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Old 01-15-2019, 11:04 PM
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^yep
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Old 01-16-2019, 12:22 AM
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Originally Posted by ECaulk View Post
Get an intake, that will make it way louder
I have a k&n typhoon that shipped this morning! The point of this thread was just to make sure what I was hear was indeed flutter and not compressor surge before I started throwing my dp and catback along with an intake on then a 94 octane tune!
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