Thread: Can I install a higher output alternator?
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Old 10-21-2009, 07:29 PM
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KSW64 KSW64 is offline
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Join Date: Jan 2007
Location: Round Rock, TX
Cobra Make, Engine: Hurricane HM1015
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Just as a reference, a 100 amp alternator, under max. output, takes about 9-10 horsepower to turn, similar to an AC Compressor. Most vehicles with an alternator rated over 75 amps are usually equipped with either 2 belts or a serpentine setup. I have a 105amp MSD single-wire alternator with a single v-belt. If the belt slips just once, it will play havic on your electrical system. Symptoms includes battery not charging, problems mimicking a bad ground, irregular voltmeter reading. Ask me how I know.

One new battery, 2 flatbed rides home, one trip to the alternator shop, and finally a $6 belt. I bought two.

Happy charging!
Ken
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