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It all comes down to " optimization ", but as amateurs without wind tunnels, what is the best that we can do besides guess what the air is doing ?
You could do all the right aero tricks to a car and still have an unimpressive Cd
I personally think that the best tool that we have is tuft testing, since it shows the problem areas in our testing.
That, and of course CFD and lots and lots of A-B-A testing .
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