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Old 12-29-2007, 11:56 PM   #8 (permalink)
MetroMPG
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Join Date: Nov 2007
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
90 day: 70.75 mpg (US)
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Good illustration, rwaffle. In fact, I'm pretty sure I'd read that tidbit (about the potential for diesels to benefit more from aero mods) and saw similar maps posted at TDIclub.

But I don't know turbos at all. What's the effect of taller gearing on turbo operation? If dremd's goal is to stay out of the boost, wouldn't reducing RPM through a gearing change raise engine load and cause the boost to come on sooner for a given road speed?
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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



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has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
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