I'm still looking for the full version of the TV show Wheeler Dealer episode with the 1985 Ford Escort RS - Cosworth. The car starts out a Bi-Wing, ends up a Tri-Wing, they took it to a wind tunnel, no smoke, just scales, 25 extra pounds on the rear wheels. They met the original designer, he talked them into adding the middle wing as intended for the original road rally version but not on the street version.
Was this:
http://forums.vwvortex.com/showthrea...de&p=107979721
Now this:
http://www.motoringbox.com/cars/ente...t-rs-cosworth/
I suspect this works similar to my proposed Porsche 911 Sponge Bob tail.