Quote:
Originally Posted by aerohead
I can say that the boat-tail achieved the lowest drag reduction and best top speed enhancement.
With the short nose,front gap-fillers,piece-meal belly pan,rocker panel extension,diffuser,rear wheel skirts,and 12" boat-tail extension she came in at Cd 0.235 according to Glenn Sharf at GM's Aero Lab, based on highway delta-mpg .
Top speed was redline limited in 3rd gear so I didn't learn all I wanted there at Bonneville.The 'kit' did add 9-mph at 4,200' elevation compared to the CRX completely stripped.
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I've been interested for a while with this Bonneville fascination, but I must say I don't fully understand. It is true I suppose that at"level" top speeds of well over 100 MPH, ALL the power is going to overcome aero resistance. So one can make some calculations of Cd with reasonable accuracy. Is that the point?