Couple of questions about a t3 turbo


I'm getting ready to buy a turbo for my application and I'm really considering just a t3 I have an 88 CRX with a b18 and im running all stock internals with hondata for fuel management with larger injectors. I only plan on running around 8 or 9 psi.. how much of a horsepower gain can I expect with the t3 on all stock internals at around that psi? Is there a way of guesstimating or figuring it out..?
there's about 50-60 t3's out there. without knowing what one you have exactly, it's impossible to make a guess any better than 100-500 whp.