<div class='quotetop'>QUOTE (reecegze @ Aug 17 2008, 06:01 PM) </div>First up, you won't make more than 160rwkw, just due to the turbo, more boost won't equal more power once you're past 16ish PSI (on yours), will just start blowing hot air (literally) due to being out of its efficiency range.
Unopened motor, i think 280-300rwkw is about the limit. That will be with a TD0625G/T67/GT35R or something equally massive, and it sure won't be much fun. Supporting mods will have to include 700cc+ injectors, bigger throttle body, larger inlet plenum, 8.5mm+ lift cams, and lots of revs. But then you're just pushing the motor a little bit too much, for basically a shithouse laggy drag car.
A FUN powerful 4AGTE, i would do 256/264 8.Xmm cams (the limit of standard over bucket shims), a well designed exhaust manifold, and a GT3071R, TD06-20G (8cm version), T518Z .... It would still be quite driveable, do an 11sec 1/4 with ease, and you could still do fairly alright as a drift car. My guess would be 220-250rwkw with either of those combos.