Ok, my Type S does that nifty flutter right, but it does it as I'm accelerating basically feels like it can't hold the boost. I've tried tightening and loosening, but nothing seems to work, I go full throttle and the car doesn't.

What do ya'll think...I don't have a lot of mods yet, a few bolt ons, 3" Invidia TBE with test pipe, ARC intake, Profec B EBC, NX Ntercooler sprayer, and Greddy Type S BOV....running 16lbs on low, 22 on high boost. Why does the BOV do that and how can I fix it or do I just need a different one? There are no vacuum leaks and everything was checked and double checked. Thanks!!

 

Something else you might want to consider here. When I was running into boost flutter problems on my WRX, it turned out that the wastegate spring was too soft. Had to go from an 8lb spring to a 15lb spring.

Then again, I'm an Evo n00b, so everything I say can pretty much be chalked up to conjecture and B.S. at this point.

-Bis

 

are you using both ports on the BOV?? the two smaller ports?? that seemed to cure my problem of leaking that little bit. the top port should go to a boost source, while the bottom port should go to a non boosted source.