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Old 04-05-2008, 08:51 PM   #11 (permalink)
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Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.07 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
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Originally Posted by aerohead View Post
Should you have had Hucho's book,you would have found that if the airdam projects below the elevation of the lowest suspension member,drag will begin to grow as a percentage of the percentage increase in frontal area.
Except I keep seeing examples where that rule doesn't appear to hold. The Car and Driver Pinto, for example. Even the new Tahoe hybrid's air dam appears to my eye to be much lower than any of the truck's dangly underbits:

Of course it's hard to tell from a photo, but I have also seen this on GM's full size panel vans. Maybe it's also a function of the relative "cleanliness" of the underside, apart from the height of the lowest parts.

Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
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