It's a brand new bv57 gonna try some stuff with it Thursday
Yes grip tec, uhm I've unclamped and reclamped and checked everything, tuner isn't seeing loss of load to indicate any air leak anywhere just for some reason not getting any more boost going from 3.6 to the 3.33
Replied in one of your threads, similar results. I went from 3.6 stock pulley to 3.48 and lost power on the Dyno, only thing I figured was the air was bad on the day I dynoed with the 3.48. Hope you find something, as it will probably be the same things as mine. I did run mine with the 3.375 pulley and it had less MPH and slower than similar builds with larger pulleys. Car was pulling timing on the back half due to IATs. I have a solution for that but haven't been back to test it.