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Old 06-04-2013, 12:38 PM   #21 (permalink)
Frank Lee
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Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
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Quote:
Originally Posted by slowmover View Post
Electric fans just shift the exact same burden to the electrical system. Are you willing to put it to a higher strain? Might gain a little in solo driving, but the question always exists as to whether an aftermarket set of e-fans is capable of the same duty rating as the mechanical fan.
No, they don't shift the exact same burden. The mechanical fans, even clutched or flex, are always spinning thus are always a parasitic loss especially at above idle rpms.

In my experience (several years with NO fan in the F150, including towing) the only time the fan is needed is when the vehicle is going too slowly to move air past the radiator- for example waiting at stoplights or extended parking lot maneuvering- even moreso if the A/C is on. I do completely remove my winter front when it's warmer out.

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