Thread: Alternator Underdrive Pulley
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Old 04-10-2005, 07:05 AM
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djseed djseed is offline
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Join Date: Feb 2000
Location: London, Canada, ONT
Cobra Make, Engine: SPF 1630 '70 429 SCJ / 501
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I had the same problem with my BB and underdrive pulley set. At Idle or just off idle it couldn't keep up with the 2 fans, lights, blinkers and MSD. I was using the standard 1 wire Ford 70 amp chrome alternator. Another SPF fellow had the same problem and recommended the PowerMaster alternator - 8-37140. It produces about 80 amps at idle without the underdrive pulleys. With the underdrive set it worked perfectly and I have not had a low battery since the change. It came as a kit with the larger charging wire for the starter.

http://www.powermastermotorsports.co...le_chrome.html
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