[Wayne Maybury]

I have a setup the same as pictured in wadesdad's diagram on the right. I had to change regulators 2 or 3 times before I got one that would allow the alternator to charge at about 13.9 or 14 volts. I have an electric fan, electric water pump, MSD box, etc. My problem is an night when everything is running and I have my headlights also on, the voltage is only about 12 V or so (11V at idle). I had the alternator rebuilt using all the "high output" stuff and the shop said it was putting out 100+ amps at full RPM. I have never had to charge the battery and the car starts and runs just fine, I am just a bit concerned about the low voltage at night.

I am wondering if the wire from the alternator to the battery "+" may not be heavy enough to allow the required current to flow. Any ideas? What gauge should this wire be? I am also considering changing my electric fan which seems to draw a lot of current.