Quote:

If you can find a factory a/c 6 blade pump that is the best way to go. They circulate water slower and keep it in the radiator longer.Much better cooling.



If the water circulates slower it also stays in the motor longer which gives it time to absorb more heat. Tradeoff.

The real reason for the 6-vane pump is to prevent cavitation at the higher A/C pump speed, A/C pumps are normally driven 140% of crankshaft speed.

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