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Old 02-06-2010, 01:48 AM   #17 (permalink)
ChrstphrR
EcoModding Apprentice
 
Join Date: Jul 2008
Location: Sault Ste Marie, ON, Canada
Posts: 128

Schwartzejetta - '00 Volkswagen Jetta TDI GL
90 day: 52.87 mpg (US)
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Quote:
Originally Posted by RobertSmalls View Post
And, this picture has me wondering where the stagnation point is on a stock car, and on one with a grille block. Do I want to send air over the car where there's more room for air, or under the car to fill the vacuum under the tail?
You want to send most of the air over the top, and around the sides (like what aerohead usually extolls, and Basjoos mentioned in his post too.

For the most part, you wouldn't want a LARGE increase in airflow under the car, or it may have an unsettling lifting body effect, which could affect handling at highway speeds or higher. Not that this is likely to happen with the shape of the Insight's nose; but it was an issue with the Stingray Corvettes of the mid-60s.
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