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racin4jc, this thread stems from the alternator change "how to" thread.
basically, if you upgrade to a high output alternator, the stock wire going to the battery, is very small (12 gauge maybe?) and is not meant to handle the kind of amps a high output, puts through it... therefore your car isn't getting the full effect of the alt swap. Putting in an accessory power wire from the alt to the battery 8 gauge or better, essentially gives you the extra power the alt already produces.
make sense?
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