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Old 09-07-2012, 11:37 PM   #8 (permalink)
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Originally Posted by stillsearching View Post
Okay. Does anyone have any rule of thumb of what mileage improvement I might see from each option?

And what additional improvement blocking grille with cardboard and folding the mirrors in?

Or just plain driving as slow as I can without being arrested as a road hazard? :P
The 1988 SAE Paper from the folks at Texas Tech did a full breakdown for drag with different tonneau cover and cab-wing combos,and with both short and long bed pickups.
GM's half-tonneau U.S.Patent has a drag vs tonneau length breakdown included.
If you can get a hold of these documents you'd have something to chew on.
Perhaps some of the members can help.I'm about 500-miles from home right now and have no materials with me.
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