hp gains depend on how nuch nitrous you're gonna use, and how much boost are you going to run. a beginner should run 50 shot of nitrous. this'll probably gain you 35 hp at the wheels. as for a turbo, you'd be better off running 6psi and you should be up to 225~230 whp. as for nitrous and a turbo, you got some major engine work along with a new torque converter, a new valve body, and all the necessary hardware to make this happen. It's gonna be expensive, I'm talking close to 20K. I have already spent close to 10K, and I am not safe to run nitrous and a turbo.