Quote:
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.  |
I don't see how that is possible and if it were we would be seeing alot more gains from our mods once we reach that magic point. My car stock is in the 320RWHP range and right now its at the 440RWHP range. At what point do my mods equate to 100%RWHP gains? I think the answer should be never. I don't know the exact drivetrain loss for my car but do believe its around 20% both modded and stock. Some cars just have a more efficient drivetrain so their losses are not as great. I am pretty sure almost any Mustang with a heavy 2 piece driveshaft that switches to a 1 piece carbon fiber driveshaft is going to see a increase in RWHP on the same car same dyno. I don't care if he is making 300RWHP or 1000RWHP. Gearing, wheel/tire weight, trans and rear axle type will also play a huge role on how efficient drivetrain losses will be. I don't know if the percentage in losses will go down or not as HP goes up ( maybe someone with a engineering degree can explain why or why not) but I know for sure that you can't get to x amount of horsepower and after that there is no more % lost.