Quote:
Originally Posted by 25stevem
...But your fans should not need to run for that long atleast in a street car once your above 30 mph, I mean if your cooling system does not need to be crutched by having the fans running at that point.
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I would argue that point. My '67 GTO has a high pressure area under the engine that builds up with speed. My fan does as much work at highway speeds as idling around town. Now if I were to get busy and make up an air dam for the front of the car blocking the airflow then that high pressure area would go away and the air would freely flow through the radiator. I remember reading that Trans Am's that had the front spoiler removed would run hotter on the freeway. Sounds like they had possibly an even higher pressure area under the engine bay.
Also as said above, a fan has to move a certain amount of air to maintain engine temps. This required energy should really be close to even between mechanical and electric fans. Otherwise the no-free-lunch principle would be violated.
