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Old 03-23-2018, 06:34 PM   #18 (permalink)
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Originally Posted by freebeard View Post
Thanks, but I was thinking of the roof-top part.
The way that works is the gap or air-slot between the roof and the wing. The air gets accelerated thereby lowering the pressure, the higher pressure air above it then drops (in theory).

I think one of the after-market roof wings (spoilers/visors) could be modified to have such a slot creating an air-fence down the back window.

Looks like they run +$100, maybe a home-brew creation will be more cost effective in retrospect, especially if you mess it up the cut.

Another approach is a bi-wing?

Harder to pull off by just guessing your way though it though.

Ford spent like a gazillion dollars to perfect that one I assume.

However, this is the similar direction I want to go in with my next experiment.

Anything that plumps up the rear deck to near aero-template profile should work to some degree in my opinion.

This angle below (red car) is close to that of the Civic in question, maybe it isn't all that bad?
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Last edited by kach22i; 03-23-2018 at 06:53 PM..
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aerohead (03-24-2018), freebeard (03-23-2018)