[QUOTE=328iTe36;3625853when he pushes anything higher than 6psi, at about half throttle and 4000 rpms seems like he hits the rev limiter [/QUOTE]
Sounds like a boost leak. check all couplers replace with T-bolt clamp. Pull on and all IC piping make sure its all tight.
I had this same problem i had cheap regular c-clamps and had a leak. seamed like it hit the rev limiter. Replaced all clamps with t-bolt. problem solved.
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