Well, do you know which motor you want to start with?? Well either way, you will need motor work on either the SR20DET or the KA24DE. Duy's old '95 240sx made 550hp with out the juice. He also has a 100 shot on there but never used it. Many of the Top Tunners in Japan have 500+hp SR20det's. JUN's was pushing 700hp and did 8 sec 1/4 mile runs on the stock chassis. Signal's SR20det is also in the 700 range. It all depends on what you want your car to do. I really don't suggest you build a 500hp car to drive everyday though. Tell us what you want your car to do. And we maybe able to help you better.
Duc Tran
www.boostfactor.com