Quote:
Originally Posted by brucey
Hmmm
Found some spare screen in my rafters, decided to try it out.
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Plastic screen or metal? If the former, watch out for melting near the exhaust components. Ever had a plastic shopping bag blow under your car and stick to its catalytic convert? I have, and the car stank like a melting candle for a month.
Using screen material is an interesting idea. It is porous enough to let the cooling air from the engine compartment diffuse out under the car, yet smooth enough from the perspective of the air passing under the car on the highway that it should reduce drag. Come to think of it, if you cover the entire bottom of the car with the edges sealed it might also act in part like a grill block - it would partially restrict air flow into the engine compartment by raising the pressure there. There are possible variations on this theme, for instance, overlapping angled slats.