The big question is how much power do you want. Peepz with monster turbos me including don't make any real power until like 4k. With a smaller turbo you will be able to make power faster but it'll have a limit to how much power it can give you. My t3/t4 turbo is supposedly capable of 400 HP but am I using all of that? Nope, so you have to know what goal your shooting for. I suggest you buy a book about turbos, it tells you how to build a turbo system and tune it for your car. I forget what it was called I saw it at a speedshop.