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Old 06-16-2011, 01:42 PM   #24 (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)
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Quote:
Originally Posted by wyatt View Post
This should be a fine use of the template. The problem is trying to make a compound curve like that out of coroplast... If I were you, I would make the front of your spoiler square, and at the back, taper the top of it in at a 45 degree angle, and let everything else fall where it will. I had put a 4' SedanKamm on my car, and this is the method I used, and it worked great with strong attached flow on the sides.
That is a good looking DIY mod. And a 6% FE gain is cool. I'm hoping for 0.5-1% FE gains with this trunk lid. Looking at your Kamm makes me feel like giving the lid up. But I want to finish what I started. I want to know methodically if it can work and how well or poorly. Are you still running your Kamm? What are the windows made of? On the curve-cut in coroplast, I hear you. I bought tin snips, curved, for the coroplast cuts. But I'm still not confident I'll get a great line. I'm patient. I'll work up a model of that section in card board first. Ultimately, I know I want to build whatever is final in durable materials (lightweight fiberglass).
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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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