454cid
Sooper Pooper
Confused..... says "charging cable". Why would a charging cable need to be that big? This chart is reccomending cables larger than my OEM starter cable.
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I'd expect your battery-to-starter cable is 4-gauge.
Your "charging cable", i.e., alternator output cable would probably be 6- or 8-gauge.
Yes!That's exactly what I'm getting at..... the chart says "charging cable" and for a 125-150 amp alternator is specing a 2 gage charging cable, not the 8 guage that my truck has from the factory.
What junction point should you run the cable that goes from the battery to the starter? Every GM I've seen has a straight run to the starter.Also, you should run battery to a junction point, and then from there to the alternator and the starter
this is correct. same reason why the blower motor plug and wiring melts and can catch fire when the blower motor starts to go out. factory wiring is built to an absolute minimum spec. similar goes for the headlight switch. you get much brighter lights running your own headlight relay harness that has proper sized wiring.Yes!
Because the 8 gauge is subpar and always has been
Yes!
Because the 8 gauge is subpar and always has been
Often, the starter solenoid IS the junction point. Some older GMs used the horn relay as a junction for most loads other than the starter motor.Also, you should run battery to a junction point, and then from there to the alternator and the starter
Consider "duty cycle". That "125 amp" alternator is putting out twenty amps most of the time; and almost never puts out 125. That's why it's the size of a softball. It's a 30-amp alternator with delusions of grandeur. It can throw 125 amps +/- 10%...for a few seconds.That's exactly what I'm getting at..... the chart says "charging cable" and for a 125-150 amp alternator is specing a 2 gage charging cable, not the 8 guage that my truck has from the factory.
the 8 gauge is subpar and always has been
A lot of truth to that. Vehicle wiring often does not follow proper standards for voltage drop in a circuit. I was surprised when I took after my Luminas with a voltmeter looking for the three volt loss in the fuel pump circuit. I expected to find a 2+ volt loss somewhere. Instead, I found .1 and .2 losses...everywhere. The wiring was just too damn small for the amperage it was carrying and the length of it all.this is correct. same reason why the blower motor plug and wiring melts and can catch fire when the blower motor starts to go out. factory wiring is built to an absolute minimum spec. similar goes for the headlight switch. you get much brighter lights running your own headlight relay harness that has proper sized wiring.
The guy is nuts. He's pushing multiple ground cables and an alternator output cable that are bigger than the starter cable.look up "big 3" wiring upgrade. i'd do 0 gauge power and grounds on any vehicle even if it has a stock alt