first of all, why are you shooting so high? are you looking to run consistent mid 11s at the track or are you just wanting a fun car to romp on when youre driving around and beat up on a few unsuspecting sports cars?
either way a 400 whp grand prix us STUPID fast compared to what you have now. a 400+ whp turbo car will constantly be breaking axles and its just not a car you would want to drive everyday unless you have a ton of money to keep it running. youre going to need a transmission almost right after you put a turbo on your car as well. all im trying to say is, i dont think you know what youre getting yourself into. a rocker setup on a turbo car will run 12s at the track EASY and push 300+ whp. you really need to think about what you want out of this car.
