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Old 09-13-2010, 02:12 PM
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CobraEd CobraEd is offline
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Join Date: May 2000
Location: Northern VA, VA
Cobra Make, Engine: Classic Roadsters
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Running the fans when they are not needed (when the engine is not yet warmed up, or at high speed) puts an unnecessary load on the alternator which is a horsepower drain. Fans can draw a lot of amps, and can cause you to lose HP due to parasitic alternator load.

My fans kick on automatically from the sensor on the radiator and only run when needed. I also have a manual over-ride switch if needed, but almost never use it.


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Last edited by CobraEd; 09-13-2010 at 02:46 PM..
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