okay guys...
to the OP, let me explain something to you. this thread is getting these ridiculous answers for a couple reasons. we get threads like this on a regular basis. you're new, and we know nothing about you or your project. nobody wants to pour tons of time in to responses just to never hear back from you or never see your project get off the ground. also, you posted in the general discussion. there's a 4cyl forum as well as a forced induction forum. lots of info in both, though youll want to direct your time toward the FI forum. additionally, youve asked a very open ended question showing that you've put little time into research yourself, you're just looking for someone to answer your questions. the info is already out there, youve just gotta find it.
on topic, i know might a thing or two about the 2.3t's. i own a turbo coupe and have put quite a bit of time into researching power adders. your engine isnt designed and built to handle that kind of power. contrary to what straycat believes, your crank and cam are probably good for it, but certainly not your rods and pistons, or your head. you say money is no object? contact bo-port.com, stinger-performance.com or esslingerperformance.com and tell them that, they will make you change your mind. you want to do it on some sort of a budget? here's my opinion but certainly not the only one. start with a 2.3t, that will put you way ahead of the game. from there, it's up to you. plan on a bigger turbo than ever came on a 2.3t from factory, bigger injectors, a ported head and mild cam, intake and exhaust manifolds and some type of engine management. pretty common belief is that the 2.3t bottom end will handle 400hp, but not the injectors, stock turbo or engine management. depending on what stock parts you end up with, they may be good for 300.
spend some time reading through the performance info at the three sites i listed, as well as turboford.org. you're certainly not the first person to want to squeeze that much power out of a 2.3, which means you have the luxury of pretty easily obtaining info that others had to work for. like i said, it's already out there, you just gotta find it.