Need more power! Kinda slow at higher RPMs too.

[Jason]

Ok I had a little grudge race with a buddy and his modded Jetta TDI. From a punch he pulled me, from a boosted launch he had me about a car and a half by 50mph or so. I've got lots of smoke, so lots of fuel... I haven't fooled with the waste gate, but I do have the dump valve plugged off and the turbo light is on, so I'm guessing I'm getting around 10 or 12lbs of boost. I have the exhaust straight piped, and stepped up to 2.5" out back over the axle, though its still 2" at the turbo. What I am noticing is that the car pulls pretty well once the turbo has spooled between say 2500 to 4k rpms or so, but above 4k it seems like its taking longer to wind out that last thousand RPMs or so to shift when its to the floor. I'm thinking it would be faster if I adjusted the kickdown cable so it would shift at around 4k rpms at WOT. What will help this thing pull harder at the higher rpms? I advanced the pump timing, though I haven't put a dial gauge on it. I scribed a line and tapped the pump over about a 32nd of an inch. There is a little more rattle and it is more responsive though. Any thoughts? I'm planning on doing my water meth setup tomorrow night and turning the boost up a little and see what goes...

Jason