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Old 11-28-2007, 03:12 PM   #10 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,464

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

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)
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Where ERPWR = "engine revs per wheel rev" (gear ratio * final drive ratio)

gear ... gear ratio ... ERPWR, stock tranny ... ERPWR, 3.52 final (4 cyl) tranny

1 ... 3.416 ... 14.99624 ... 12.02432
2 ... 1.894 ... 8.31466 ... 6.66688
3 ... 1.28 ... 5.6192 ... 4.5056
4 ... 0.914 ... 4.01246 ... 3.21728
5 ... 0.757 ... 3.32323 ... 2.66464

So I'm kind of "gaining" another gear. The stock tranny 5th gear/diff product is actually slightly shorter than the product of the 4-cyl tranny's 4th gear/diff.
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