[Halon]

Are any of your little vents hooked up backwards by chance? Any of them clogged? What if you removed the one from the intake pipe. Maybe it's hindering flow and not getting as much blow by out under full throttle?

Also, maybe not the ideal idea, but have you thought about taking it out and throwing it on someone else's car that is running well, to rule out the possibility of a bum turbo?