Quote:
Originally Posted by wontfit
does anyone know the official number? any difference between the base model (since it has no body kit) and the sport? most cars are around .34 old muscle cars are like .4 -.5 
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Based on experience I believe the .34 is good and applies to both base and Sport versions. I seriously doubt if the Sport has antghing to lower the Cd.
Cd is the drag coefficient compared to a barn door of same area being = 1.0. Kinetic and potential energies have nothing to do with those. And tire rolling resistances aren't involved either.
Cd is meaured in a wind tunnel with load cells measuring the push to the rear for various wind speeds, compared to that of a flat surface of the same cross-sectional area.
And only a few muascle cars got over .4; I measured some of those.