whistle at high rpms??

[glanata86]

just installed my fmic and i went for a test drive and the car drives great, the only thing is that i can hear a smooth whistle right before i shift gears...i checked for leaks and everything looks ok...i have a hks bov recirclulated and cobb short ram intake....its only at high rpms thats it not at idle...

 

[bova80]

it is probably a leak that only happens at higher boost levels. you'll need to create a boost leak tester and pressurize the system up to about 20psi.

i made mine from a hose cap and a tire fill valve and just sealed it into place with silicon and hot glue.

 

[glanata86]

thanks ill try that, also ive noticed that the flutter on the hks bov slowed down since the fmic...i wonder if my bov is going bad i got the bov off ebay is the fake hks black edition... like i said b4 i have no lose of power or boost drop at all...im sorry i said i hear the whistle b4 i shift but it happens at the same time the bov flutters lol sorry