04-18-2010, 05:40 PM
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CC Member / Sponsor
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Join Date: Jan 2002
Location: Provo,
UT
Cobra Make, Engine: HiTech Legends GT500
Posts: 1,359
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Not Ranked
More important than the diameter of the bottom pulley is the ratio of the bottom pulley to the water pump pulley. We have found that a 1 to 1 ratio works very well on most engines.
Having the water pump pulley over driven will only cause problems at high engine speeds. It will help at lower engine speeds.
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