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What is this sound?

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Old Jun 26, 2011, 08:14 AM
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What is this sound?
My car is making a loud fluttering sound once i let off the gas after boosting. I changed out my stock 8 dv for the metal stock 9 dv thinking that may help, but it didnt. Its been doing this for a while now, but not this loud. I really just want to make sure it isnt harmful... from what i can tell on synapse's videos online it sounds like flutterdump? but i honestly cant tell. how can i tell if its compressor surge? it sounds the same to me.

car is at about 350whp and only boltons (tbe, intake, licp, ams fmic, ebay o2, 9 dv) with an english tune at 22 psi

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Old Jun 26, 2011, 08:18 AM
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Check for boost leaks..same issue with mine
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Old Jun 26, 2011, 08:20 AM
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Originally Posted by Revo15
Check for boost leaks..same issue with mine
thats what we were going to do today. its just so annoying to have to hear it every shift
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Old Jun 26, 2011, 08:23 AM
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check the bov/dv then vaccum lines and fmic piping couplings..let me know the results
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Old Jun 26, 2011, 08:27 AM
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Originally Posted by Revo15
check the bov/dv then vaccum lines and fmic piping couplings..let me know the results
will do
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Old Jun 26, 2011, 08:30 AM
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Check all the Ic piping..its always the small things..could be the bov not opening up..
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Old Jun 26, 2011, 08:35 AM
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Originally Posted by Revo15
Check all the Ic piping..its always the small things..could be the bov not opening up..
thats what i thought... i got the 9 dv but no noticable change. im checking ic piping now
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Old Jun 26, 2011, 08:46 AM
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Make sure u check the coupling itself..not just tightening the clamp..cuz the couplings sometimes get cracked up and there u go...boost leak right there.
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Old Jun 26, 2011, 05:22 PM
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Originally Posted by Revo15
Make sure u check the coupling itself..not just tightening the clamp..cuz the couplings sometimes get cracked up and there u go...boost leak right there.
found zero leaks or cracks in couplers today.
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Old Jun 26, 2011, 06:31 PM
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in for updates. could your BOV be leaking? Crushed wastegate?
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Old Jun 26, 2011, 06:44 PM
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Then it might be ur dv or vaccum lines...did it always used to sound like that?
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Old Jun 26, 2011, 06:48 PM
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Originally Posted by marcusE
in for updates. could your BOV be leaking? Crushed wastegate?
i was wondering if it could be the wastegate. how would i check that?
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Old Jun 26, 2011, 06:49 PM
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Originally Posted by Revo15
Then it might be ur dv or vaccum lines...did it always used to sound like that?
didnt always sound like this. only after i changed the intake to the aem. its driving me crazy though
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Old Jun 26, 2011, 06:53 PM
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Dude..fureal man my aem is fluttering like crazy..is ur car tuned?btw my car pushing 10lbs lol so yea lol
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Old Jun 26, 2011, 06:56 PM
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Originally Posted by Revo15
Dude..fureal man my aem is fluttering like crazy..is ur car tuned?btw my car pushing 10lbs lol so yea lol
yeah tuned by english racing. i figured they wouldve said something if it was harmful but they didnt... idk man
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