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Old 12-10-2013, 05:49 PM   #181 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by slownugly View Post
Gave her the spa treatment today on my lunch. Inspection lof tire rotation. Adjusted rear brakes. Gota love hypermiling, my front and rear brakes haven't changed since I got the car 40k miles ago.

Anyways here's what I'm working with on the rear belly pan.


The center cradle will be a main attachment point and the rear bumper. I can also follow it out to the mudflap. The opposite side of the muffler will be a smaller piece.
Mine is the 98 civic but they are very similar in body style, and i have wondered if the angle of the rear bumper cover's bottom edge is close enough to define a good angle for a diffuser. What do you think of this pic?



Look like your rear bumber cover? I think it might define an angle that can also clear the suspension parts just behind the gas tank.

This image sugests you want 3-4 degrees angle:



james

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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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Old 12-10-2013, 08:01 PM   #182 (permalink)
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VLX - '93 Honda Civic VLX
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I don't think mine has as steep of an angle as yours. Mine looks flatter. Even if mine doesn't achieve the diffuser effect just having it as a rear belly pan would be great.
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Old 03-22-2019, 10:00 AM   #183 (permalink)
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Nerve Agent - '94 Honda Civic VX
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This is a great thread. My son is driving my VX at the moment but I am excited to get it back and do a warm air intake.

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