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An old school Chevy V8 at 6000 rpm might be losing about 10HP to the water pump. That same engine loses less than 3HP to the pump at 3000 rpm. Where are we usually at- 800-2000 rpm? Educated guess says <2HP for the big Chevys most of the time and then there is my little 4 banger which has a pump that looks about half the size.
I slowed mine down 33% for $20 and INCREASED system simplicity, cost, and reliability over stock. At probably 1HP or less draw stock, I may have saved .25HP? But I slowed the alternator down too, deleted 4 belt driven items, and threw out a nice amount of front end weight.
Last edited by Frank Lee; 03-30-2012 at 07:41 PM..
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