Quote:
Originally Posted by Sven7
Hot Rod Magazine (I think) did some wind tunnel testing on a second gen Camaro land speed racer and found that lowering the car in any way-front, back or all around- was beneficial (this may have been from Hucho, but both are useful sources). Your sloping roofline probably acts like a very mild kammback right now, recovering pressure built up by the front of the car, and as long as you have an air dam to deal with air aimed at the underbody, you should be fine.
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I ran across a note from an article a neighbor who owned a Porsche 914 shared.
The 914 was tested at different ground clearances:
*zero G.C. = Cd 0.30
*140 mm G.C. = Cd 0.34
*165 mm G.C. = Cd 0.357
*180 mm G.C. = Cd 0.367