Aero Mod Questions

[aerohead]

Originally Posted by Xist

I am honestly not sure how much air dams actually increase the frontal area. We say not to have them hang lower than the lowest part of your suspension. Basjoos has double side skirts. Have you read about the Aerocivic? If it helps, he has probably done it.

Basjoos's side skirts are coroplast: http://ecomodder.com/forum/showthrea...1-0-a-290.html

These members used rain gutters: http://ecomodder.com/forum/showthrea...rts-10749.html

In Feysal Ahmed Adem's Master's Thesis,he measured a drag increase when a Dodge RAM airdam was lowered below 6" ground clearance,until it got to 3" of ground clearance,where the drag went down 1%,compared to the 6" G.C. airdam.
The 3" airdam would be for racing only,completely impractical for daily driving.
Bondo had fabricated a fabulous low clearance composite airdam for his F-150,but had to raise it due to higher fuel consumption.
Hucho says never to aggravate frontal area if you can help it.
Two known exceptions are Don Burr's teardrop trailer height,and Kamm's (Fachsenfeld's) 10% width increase to add longitudinal body camber