boost leak?

[mexicanzero]

i just put my intercooler in and lately i've been hearing a very loud "air" noise that sounds almost like the BPV when im on half throttle with about 5-8 psi of boost. when i floor it and go to 10 psi the sound goes away almost completely when i let go of the throttle i hear the louder woosh of the BPV. is this a boost leak or could the intercooler just cause the intake to be louder and all i'm hearing is the air going in the engine? i also did the snorkus mod after the intercooler but i was hearing the air noise before i did it.

i accidentally cracked my bypass valve on the nipple that hooks up to to the intercooler. the crack is tiny and is almost completely covered by the hose. can a crack this small cause a boost leak that audible?

thanks
-Alex

[SubaruNation]

probably, in addition to that make sure EVERYTHING is tightened down alot. you used T-Bolt clamps on the hoses right?

[douglas vincent]

The higher the boost, the more you lose, and so even small leaks loose ALOT of boost.

[mexicanzero]

i'm going to replace the bpv anyways because no good can come from a crack right? i just didnt think a crack that size could cause a leak that noticeable.
as for the clamps i'm actually still using the rad hose style (new ones) because no one around where i live sells the t-bolt style and i didnt think it would matter that much since i only upped the boost a bit.
i guess i'll look into ordering some although the shipping will probably be more than the clamps themselves!
thanks
-Alex

[yazmo]

what is the pbv?

[Legacy777]

It's the equivalent of a blow off valve that vents the air back to the intake before the turbo.