Can't hold boost, did a boost leak test, check inside.

[4g63tcrazy]

I know you know what your doing, hell what do I know running around with a 15.2 afr? lol. What I stated is what I've heard over the last 3 years or so about this turbo. No hard facts, it's basically the whole reason the turbo drops off boost is cause it's not efficient enough to hold that high of boost in the upper rpm's. But like I said this is all that I've "heard" so go out and prove me wrong.

Also I believe the intake would be a pretty good restriction. Get a 3" and I'm sure you'll hold a bit more boost. Even a "street" version of a SMIM would help it out alot also.