Thread: Help with some final drive math
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Old 08-21-2018, 01:49 PM   #5 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
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Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

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Quote:
Originally Posted by hat_man View Post
... What I don't know is how my new tire size affects this number. ... To figure the final drive with the new tire size do I adjust the stock final drive by that same 5% ?
Yes. The tire is like another gear in effect.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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