Quote:
Originally Posted by Cd
I wonder if the Cd figures that are published are accurate with the stock wheels.
It seems as though there would be a lot of turbulence within the wheels.
The Lexus LS460 also has huge open spoked wheels as well, yet has a .25 Cd.
I remember reading that some of GMs' Cd figures were given with the rear view mirror removed, and other tricks to bring the Cd down.
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I'm not sure about other countries,but in the U.S.,the sideview mirrors are not factored into the frontal area reported by automakers to the EPA.So the Cd is skewed a little higher to compensate for the absence of the frontal area of the mirrors which are present during windtunnel drag measurements.Silly!