Yeah but an offroading rig doesn't see the same benefits of a luxury cruiser or drag racer since we do so much traveling at low speed. My truck is very slow actually it only moves a few inches per month. Taurus fans are cool though I'm going to end up installing one so again I'm not all against the idea.

Also I think there is something to be said for the diffference in the fan itself mechanical vs electric. Mech fans tend to be more rotating mass, than electric seing as they are more of an efficient fan design. i would also make teh assumption that per revolution more air is moved via the typical elctric than the typcial mechanical which is another point in the electric's favor.