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Old 08-20-2009, 01:23 PM   #29 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,835

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 61.46 mpg (US)
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Here are the numbers:



For comparison: remember I did a test to determine the "resolution" of coastdown testing at the same speeds, trying to see if it could register the difference between the driver's window open vs. all windows up:



So, in conclusion: a giant ugly air dam apparently has a greater positive effect on drag than rolling up the the driver's window.
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