It was on a Mustang Dyno, they typically read like 40rwhp lower, something around 12% I think.:??:
If it was a stock Cobra that was on the lower end at like 355rwhp SAE, this would be about right I guess.
I always go by SAE #s run on a dynojet, seems to be the accepted Standard.
STD #s run 2-3% higher (like 10rwhp) and Mustang Dynos put out VERY low #s.
BTW -
I give that Mach 1 less than 1 year before it destroys a piston with the blower and 10:1 compression, I speak from experience when I had my Novi 2000 blown 2000 GT and a very safe tune.
That sounds about right. Too much boost on the stock Eaton won't really help you with the HP. The torque is the only area that gains will be seen with high boost. And with more boost comes heat, which can actaully take away the power that you thought you were gaining!
Like juiced said, 470rwhp sounds about right for an upper and lower pulley car. I bet his torque was close to 500rwhp or more, I just skimmed through the article so I don't remember.