I cannot run over 6lbs without getting some sort of "cut" around 5.5-6k rpms. The rpms climb just fine until around 6k and then they cut to the redline and the car makes and almost bog like sound and begins deccelerating, then I can shift to the next gear and it will begin pulling again and do the same cut around 5.5-6k. I dyno'ed the car and found that I was running pretty lean with the fmu so changed that. I did the vafc hack with 450cc injectors and a 255lph intank and inline pump, so I should have plenty fuel, but I'm still having the same problem. What could possibly be stopping me from running more boost? I've tried about everything I can think of and gotten nowhere. Can someone please help me with this? Please!!!

 

TTT

 

Actually my car is doing it sorta. After like 6psi it deaccelerates. My setup is a d16y7, walbro255lph pump, AFC + dsm 450's. Its weird.