Thanks for the info!

What i'm wanting is to run as much power as i can without changing things like pistons and con rods (too expesive!)

Currently i'm running 14psi from a standard T3, -31 actuator, Standard engine, Scorpion exhaust, K&N induction, and i have a Radtec front mounted intercooler with twin Spal fans coming any day.

I dont want to change cams (other than for a new stock cam) because I dont want any less power pre boost.
So i thought about a bigger turbo, again if the engine cannot take any more than what a T3 can produce then there is no point but if it can then maybe i'll do that.