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Old 05-02-2014, 02:35 PM   #6
WeeYari
 
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Drives: 06 5dr LE (deceased), 13 Soul
Join Date: Oct 2008
Location: Georgetown, Ontario, Canada
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Quote:
Originally Posted by Swing View Post
10% underdrive means (at least for the water pump) 10% less power needed. (and of course, also 10% less cooling power).
If only that were true.

It is not really a matter of consuming less power. The light weight achieves that. Going 10% underdrive was a way of making the pulley lighter still, while still providing enough rotation to drive a/c, alt, and water pump.
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