Quote:
Originally Posted by Cd
I'm miserably bad at math, so please check my numbers .
.31 Cd minus 45% equals .1705
45 MPG plus 110 % equals 94.5 MPG
So a reduction of 45% in drag equals a 110% increase in fuel economy ?
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Your math misses other variables you don't know: rolling resistance of tires, engine mods, driving habits, etc. A-B testing risks time correlation. A-B-A testing rechecks baseline. However, once a car is supermodded another "A" run isn't very likely. That's not necessarily a bad thing. Real gains are sticky. Why undo successful mods to prove they helped? Human nature... (shrug)