Originally Posted by SuperHatch

To elaborate on the reasons behind this a bit... there are two driving factors as to why a car accelerates better at low speeds. Gear and Drag.... period. Gears are simply torque multipliers, lower gears multiply torque more, but since our engines can only rev so high, switching to a gear with less multiplication is needed. Each upshift results in a net reduciton of power reaching the wheels, this in turn results in a reduciton in acceleration. Compounded on top of this power reduction is the addition of drag. Drag increases with the square of your velocity. The Evo experiences 25 times (!!!) the drag at 100MPH as it does at 20MPH, and ~56 times (!!!!!!) the drag at 150MPH. Combine this with a relatively poor coefficient of drag and you have some serious force pulling against the car at higher speeds. Now you take a Z06, or an Enzo which are relatively slippery cars and their drag multiplication, while the same as the EVO at all speeds, is much less do to the lower coefficient, which is why they'll pass the evo like a bat outta hell at high speeds (combined with less drivetrain losses of course, but the drag has a greater effect).

HTH

- Steve