[Steve C.]

" I'm also not happy with the draw the elect fans put on the motor ...."



From a article about high performance cooling systems in Car Craft magazine.

"Electric fans have become popular with the OEMs because they can move enough air at low speeds to keep the engine cool, relying on vehicle speed to push air thru the radiator at highway speed. This reduces parasitic horsepower losses at highway speeds by eliminating the engine-driven fan. While this may seem trivial, dyno testing in Car Craft resulted in instance of losses of 35 hp at peak horsepower from a simple one-piece, plastic, engine-driven fan. Clutch fans lost between 8 and 19 hp depending upon the clutch model, while a Flex-a-lite Black Magic electric fan driven by the alternator cost 1 hp."

And before anyone cries foul on the statement that the electric fan driven by the alternator cost only 1 hp. Yes, testing as shown there might be a slight decrease in power from the drain from the alternator with electric fans, but it is not the large numbers often thought of. It's nothing to lose sleep over, presuming you have a charging system that is capable of delivering 40 to 60 amps output at low speeds according to articles.

( Information provided in this post does not represent a product endorsement. And unless specified it is not based on personal experience and is offered for general interest only )

Also a important caveat.... these numbers were generated using a 496 hp small-block Chevy at over 6000 rpm. I'll suggest less to be expected on a lower street rpm.





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