Quote Originally Posted by sleveritt View Post
PK, you really need to rethink your logic. You have two contradicting statements - "But by far the greatest amount of cooling is needed when you are travelling at highway speeds (NOT TRUE AT ALL), uphills (TRUE)etc, when you have the gas pedal to the floor.
At these times the fans do little, or no work at all. The air flow through the entire radiator frontal surface caused by your forward motion is enough to cool the engine (THIS PART IS TRUE)."
Why wouldn't you think the engine is doing a lot of work -- especially with a mega-high-profile jacked truck rolling down the road at hwy speeds? That work creates heat -- and needs cooling?

(Obviously air flow isn't hard to get at speed, but that wasn't the point when PK made the comment.)

Cool project, btw. Lots of know-how went into it for sure.