Quote:
Originally Posted by sailed2japan
I still need to clear more than a penny. I currently have a shell on the bed, but want to create an aerocap when I have the time. Foam shaping and fiberglass molding take a while. Not to mention if I want a window so I can see behind me, but I'll probably resort to a camera for that.
Anyway, back to the air dam
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Faisel Ahmed did a master's thesis analyzing the drag of a 2WD Dodge pickup.
He found a limit at 6" ground clearance,after which drag increased as the dam went lower.
At 3" there was a 1% drag reduction,but it was only for the race track.
Brett Herndon (aka bondo) built a beautiful 'lower' composite airdam for his F-150 and found it to hurt his mpg,and had to raise it back up,closer to the actual bottom of the truck to get his mpg back.
Hucho says to not 'add' frontal area.There are exceptions (race track,and the original aero-modded 'Crisis Fighter Pinto' of May,1974,CAR and DRIVER).