Quote:
Originally Posted by aerohead
Wouldn't their numbers come from the composite EPA dynomometer testing protocols,plus using a crosswind-averaged drag coefficient,fully-warmed,at EPA test weight (300-pounds added to front seats)?
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Stuff I have little idea about . .
It's probably more fair to go with telemetry error and leave it there, though I do have 15mm wheel spacers installed which bring them out flush with the fenders. I'd be surprised if they bump the Cd by 0.04, but the 's' version of the car has a 0.33 Cd with 20mm wider tires and flares, so that certainly seems possible. I was not aware of that difference until now and will likely test it in the next day or so.