Quote:
Originally Posted by squriellord
Now, since this reduces the frontal area, it ought to lower the CdA. However, since the sunroof is now exposed, won't the non-smooth surface where the from of the sunroof is cause a flow separation? (and increase Cd...)
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It does reduce your CdA (back to stock numbers)
But it wont cause flow separation unless you open your sunroof.