Early 87 700R4 7 VANE PUMP TO 13 VANE UPGRADE - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-10-2011, 06:01 PM
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Is there any issues that I should be concerned about with upgrading the 7 vane pump to the latest 13 vane pump kit. I assume that it is better than the 10 vane kit.

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Old 03-10-2011, 09:18 PM
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no problems with a 13 vane set up. 10 will work just fine.

Set clearance of the rotor at .0015 - .002 for best results with flat surfaces in the pump and the stator cover is flat - smooth too
Dont worry how old you are... it is the mileage on your body that adds up.
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Old 03-11-2011, 10:11 PM
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13 vane pumps are designed to keep the 300mm converters full at road speed. Additionally they are the most prone to break the rotor under high load or increased horsepower. Use a 10 vane; they worked flawlessly for years.
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