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Old 02-09-2009, 06:58 PM   #70 (permalink)
Aero Wannabe
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Join Date: Dec 2007
Location: NW Colo
Posts: 704

TDi - '04 VW Golf
90 day: 52.87 mpg (US)
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I vote for re-routing the exhaust straight out the back to let the hot air help fill in your wake. This would simplify making the wheel fairings too. I really think manufacturers choose the side exhaust location to keep from gassing people foolishly riding in the bed of a truck with a topper with the tailgate down.
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun

Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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