10 hp ends up being +/- 2%. With probably hundreds of contributing tolerances and variables, it's certainly conceivable that you could see a +/- 2% variation from drivetrain to drivetrain. I think the variability we're seeing is a combination of the dyno and motor/drivetrain variability. Fooling around with various 350Z and coupe dyno numbers, I estimate that at 225hp at the wheels I'm putting out 270 at the crank.

FWIW once I have my crawford plenum, Ztube, stillen CAI, and coupe mid pipe installed, I'm going to do another run....probably in a couple of weeks.

G35s 6MT Garnet Fire, Premium, Aero, Aero Body Kit, Winter Sport

 

Anybody ever hear of a Mustang Dynamometer? I had my (modified) G dyno'd on this machine and my max HP was 208.36, which according to the technician equates to 298 HP at the crank (208.36 / .7).