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Old 06-05-2011, 11:49 PM   #3 (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 Cd View Post
You do plan to tuft it right ?
I know I need to. But I have never done it and when I looked it up on this site, I did not find what I felt I needed: what's the best tuft length and what's the best spacing?

Quote:
Originally Posted by Cd View Post
Why not add a vertical 'spine' that meets up with the rear window? ( At the center of the car ) You could add tufts to it and get a better idea of where the airflow is going.
So you mean attach tufts to either side of a vertical section bisecting the trunk lid and rear window from the top of the window to the end of the lid?

( Basically just a rectangular piece of coroplast / cardboard that would have one edge cut at an angle to meet up with the back window.

Quote:
Originally Posted by Cd View Post
Rather than taping the tufts, you could even poke holes in the thing and sew the yarn into it. This would keep the yarn from sticking to the tape or being affected by it )
That's a clever idea.

Quote:
Originally Posted by Cd View Post
Also, the edges of the sides look like they will cause considerable drag ( my guess ). Any plans on taping the sides flush with the car ( at the B-pillar )
I would need duct tape and that would leave awful residue on the paint. Instead, I just taped up the edges of the cardboard and tightened the assembly so it fits more snugly. That, I think and hope, can be sufficient.
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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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