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Old 09-21-2017, 11:05 AM   #11 (permalink)
COcyclist
Aero Wannabe
 
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Join Date: Dec 2007
Location: NW Colo
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TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 53.2 mpg (US)
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Quote:
Originally Posted by JockoT View Post
I wouldn't imagine that would be an aid to fuel efficiency.
Exactly. Although a flat belly pan to an upslope of a 4 degree diffuser can reduce drag. I am getting better mpg with this setup on my Golf. On sports cars the diffuser is usually much steeper to create downforce at the expense of extra drag.

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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.

Last edited by COcyclist; 09-21-2017 at 11:37 AM..
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