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Old 08-05-2011, 12:07 PM   #52 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
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Quote:
Originally Posted by Quasimoto View Post
I'm back from vacation and the nose job is finally done. I used Blue Magic Pure Rubber Coating to cover it. After 1669 miles of testing the results are rather impressive. Now, this is a 1991 Honda Civic DX with an automatic transmission and no cruise control. My average MPG at 55MPH previous to the nose mod was 39.4MPG. After the mod the average is 45.215MPG. At 60MPH the average is 43.504MPG and at 65MPH it is 42.532MPG. These were all accomplished in real world driving, in all kinds of weather. Always filling at the same gas pump, the same way. The result speaks for itself.
That is a one-of-a-kind funky mod. I love it. I would recommend experimenting with a lawn-edging airdam under the new lip, close to the wheels so you don't back every single parking lot ramp you cross. I installed one and it was associated with improvements (not rigorously investigated but I am confident real improvements). The reason I say this, is because your new bumper seems to maybe push a lot of air under the car. A dam that re-routed that air to the sides would likely save significant under-car drag. Unlike some others, I set my Civic airdam to end its curve about where front tire spats would be. I was guessing that would keep down the expansion of the effective frontal area by not jetting as much air as far to the sides of the car.

BTW, the wheel covers are beautiful. You bought moon covers or you made those? How did you get them? 13" wheels?
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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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