so i have a greddy type s bov, and it had really bad flutter/compresser surge. me and a buddy adjusted it, and it worked good for a day until i got the car tuned, and now it is surging again. i tried to loosen it, and it didnt help. any suggestions?

 

Take it apart and remove one of the smaller spring

 

Hook the smaller nipple to pre-throttle body pressure and the larger one to post-throttle body pressure and it will get rid of the compressor surge.