I ran up to 200 on my stock fuel system, but my set up was kinda complex compared to most. I used a carb'd regulator to bring the fuel pressure down to 4-6 psi so the rail wouldnt have such a shock. The car was never on a dyno and had race gas at all times when I was spraying. Had a 2.76 upper, tb/plen, full exhaust, straight axle...ran mid tens on 150 with a shitty 60 ft.