just noticed this the other day.....put on a intake to route cooler air into the turbo inlet and noticed a chug sound. Say chug chug chug really fast and u got it. only under boost did it make this sound. took the intake off and it quit???
Running a type s Greddy bov.......and it sounds like it is realeasing. Any ideas. What could be causing this?

 

Wastegate needs to be bigger.

 

running a 38mm on 10 psi of bbost w/ sum creeping problems looking into getting 50mm

 

no the wastegate isn't the problem. the bov is not allowing enough pressure to release. not a big deal

 

So i might upgrade to the type r bov or a hks ssqv

 

get the Greddy R valve

 

tial 50 mm

 

Dude I run 18psi on my Greddy Type S with no leaks (pressure test confirmed) or compressor surge, although I have had those problems before. Make sure you have a good pressure source for it and the spring is adjusted properly.