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Old 10-04-2011, 02:40 AM   #27 (permalink)
Sven7
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Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456

Boo Radley - '65 Ford F100
90 day: 13.28 mpg (US)
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Quote:
Originally Posted by JasonG View Post
This week I ran the brick through the dirt tunnel (it rained off and on for 3 days)

I noticed the crud on the rear is more black. Road grime Vs regular dirt.
Is this related to the air dam ?

Here's my theory:
The air dam prevents clean air from going under the vehicle in the front.
That means the air to fill the rear void has to come from the engine compartment and sides only.
The air contains more road grime kicked up by the tires.

Does this make sense?

If so, should I work on the airflow underneath or the Kamm next ?
I'd do a belly pan next and maybe rear wheel skirts after the kamm. Also, road grime would be significantly less with some wheel fairings a la AeroCivic.

This van looks gangster by the way.
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