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Old 10-15-2011, 04:22 PM   #11 (permalink)
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2.657% delta Cd

Quote:
Originally Posted by Soulster View Post
Put on the grill block for aero testing:







So it does look statistically speaking it does do some aero help 0.35mpg whoopeeeeee... I'm sure it helps warm the car up faster in the morning, but how do test that for MPG improvement? I've watched the scan gauge and it shaved 2miles off the warm up time so it's doing something... But I have no clue as to MPG testing. Any Ideas?
At 55-mph,the delta-mpg/delta-CdA relationship is 1-to-2.Your mpg gain indicates a drag reduction of 2.657,and since you didn't change the frontal area,it's all coming off the Cd.

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