[SlingShot]

Originally Posted by 69bossnine

Agreed, the dyno numbers are "ballpark"... And while we're at it, so are 1/4 mile times... And it's difficult to reverse-calculate crank-hp #'s when the horsepower starts getting so high, because driveline loss decreases as a percentage as you increase power... The "mysteriously high" rear-wheel dyno #'s aren't mysterious to me whatsoever... There's a point at which it only takes X amount of hp to spin the driveline to the ground, and everything after that is gravy. So your percentage-factor decreases. It's not so much a function of Ford's driveline being amazingly slippery, it's more a function of the engine's power output being so high that spinning everything from the input-shaft back takes a low-percentage of the total output.

The bottom-line, as it pertains to straight-line performance, is that you can't argue-away or alter newtonian-physics to make the ZL1 pull-square with the '13 GT500.

As it pertains to road-course speed, that comparison remains to be seen, and we're all just speculating... Speculating should be done in good cheer and good sportsmanship, and a little jabbing here and there adds flavor as long as it's tongue-in-cheek.

WOW ... I actually agree, I've been arguing for a long time that the drive train loss is a static number. There is no reason for the loss to increase with the increase of power.