Vortex generators are overpriced-- unless you can find "used." Abt $4 *EACH VANE!
Both hard to recover in fuel savings --and an unreasonable profit.
Would like to try a truncated rear foil and an underframe skirt (in front of dually rear tires).
It seems no one's tried elongating a streamlined hood, which could be used as a RAM to radiator(!).
Fuel mpg is a *real issue with trucks of all kinds.
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Windows, Doors, etc
A previous post reminded me of an old idea saw some time back that a kid invented and won a prize for. Well, apparently he is still at it. Looks interesting and this idea could be made generic to fit may type Ambo's
NoseCone looks to be a good universal addition