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Old 08-09-2019, 12:11 PM   #22 (permalink)
Cyborg ECU
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 5,293

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 59.78 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Originally Posted by litesong View Post
Ah, you're looking for an accuracy of 1 in 10,000. You must be an aircraft designer. Me..... I'll take tires 8% to 9% greater in diameter. Don't care if they're 8.5%.
Yes, a little precision helps the knowledge. For example, what has been surprising is that it is not about a mere 0.5% variance as you're suggesting. The specifics of my car and the condition of the tires makes it a much more significant difference. If I just went by stated tire diameter and assumptions about how the odometer is actually measuring and reporting distance, I wouldn't be just 0.5% off. I'd be wildly off, maybe 5% off. I'm not an aircraft engineer, but I'll play one on Netflix if they pay me well enough.

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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