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Old 01-21-2013, 02:30 PM   #55 (permalink)
COcyclist
Aero Wannabe
 
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Join Date: Dec 2007
Location: NW Colo
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TDi - '04 VW Golf
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90 day: 52.55 mpg (US)
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Quote:
Originally Posted by YeahPete View Post
I believe the idea is to vent it to a low pessure area to better fill the void. Is there any way you can get it vented behind the car? Maybe by running some sort of vent inside your already made belly pan to the back of the car? Maybe 2 vents running along the exhaust. Hm.. Would that put too much pressure on your belly pan? Can someone comment on my ideas please.
Hey Pete, Some years back on this site an Ecomodder named CoyoteX did what you proposed to a rusted Geo Metro. He put a false floor above his full belly pan to duct the engine heat to the back of the car and "fill in the wake". His results were less than stellar and not worth the trouble IMHO. The AeroCivic achieves stunning mpg at highway speeds. The owner Basjoos has implemented extensive aero mods including an adjustable grill block but doesn't worry about where to vent engine heat. In theory ducts and hood vents are good but with most Ecomodders the idea is to NOT convert fuel into heat and therefore we allow very little air through the grill in the first place.
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Quote:
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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