Quote:
Originally posted by cherrington17@Apr 24 2006, 10:37 PM
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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It probably even helps with the stock alt. You will get some amount of voltage drop across the wire in all cases, however the better the connection and larger the wire, the less drop you have. This would be especially good for reducing the amount that the lights dim with a big stereo, etc.. If you really want to go nuts, you could even add in an auxiliary ground from the alternator casing to a good ground point on the body.