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Old 05-12-2009, 02:38 PM   #21 (permalink)
daqcivic
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Join Date: Nov 2008
Location: Portland, OR
Posts: 53

Daq Civic - '92 Honda Civic DX sedan
90 day: 42.54 mpg (US)

The Hardbody - '91 Nissan D21 (pickup)

The Hardbody - '91 Nissan D21 (pickup)
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Quote:
Originally Posted by wwkayaker View Post
I agree with binarycortex on the GB. Your current block will create a ram air effect (or increased pressure) on the radiator.
wwkayaker, a ram air effects is exactly what is desired for the radiator inlet, since it will mean more air going in per square-inch of opening, reducing the size of opening required for sufficient cooling and thus allowing more of the airflow over the nose to be undisturbed.

The concern with having the grill block recessed is that it may create (or increase) a static, high-pressure pocket of air at front edge nose where the grill is covered up, slowing and/or detaching the airflow across the nose. I do not think it actually does this to any significant degree, as so many very aerodynamic cars seem to have recessed false-grill sections, as well as recessed pockets for fog lights or faux cooling ducts (which should be even worse)--see the new E-class coupe with its .24 cD.

On the ducting I am trying to make for the cooling inlet, my inspiration comes from the smooth, inward-curving inlet of the Tesla Roaster (see attachment). Any thoughts about this?

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