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Old 02-09-2012, 04:31 PM   #4 (permalink)
ChazInMT
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Join Date: Jan 2010
Location: Vero Beach, FL
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MagMetalCivic - '04 Honda Civic Sedan EX
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Contrary to others here, I'd think that the improvement in shape would overcome the increase in frontal area. You could make a test shape out of cardboard, then do a coast down test or find a hill somewhere and coast down it to see how it changes your speeds with and without the tester on top.
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