nbs cable upgrade

Since I've installed my UD pulley, I've had a problem with voltage spiking at idle. (especially with stereo or KCs on)

I upgraded to a 145 amp alternator, and already have a redtop optima. I'm going to upgrade the wiring tomorrow, and was wondering the best way to do it.

Should I run a new cable from alternator straight to the battery (I would use the unused top post on the optima) or to the red-plastic covered auxiliary post?

Are there any other cables I should upgrade? (ground, other power wires)


pics would be helpful of setups...THANKS!

search "The Big 3"

tried...search won't let me. Couldn't find any threads.

Search on google. The big three is on every forum

I was more curious what kind of cable. Autozone has universal eyelet cables that are 4 gauge, wasn't sure if that was big enough. Wasn't sure if alt to red box or alt to battery is better.

Mine is alt to batt. Just do he big three upgrade. I used 4 awg but some people use 0 awg and i think george used welding cable.

ran 2 gauge from alt to + on battery, and the ground on the alt to the - on the battery.

Did not help AT ALL. My electric fans still drop the gauge to around 10 volts for 5-6 seconds, and it bounces between 12-14 with beats of my subs (running 2 10" kenwoods with a 750 watt profile amp, shouldn't pull THAT much)

I don't see where the ground cable goes to the frame...only cable I see is the thin braided strap bolted to the firewall.

Run a 0 awg from your + to the little red box. Then 0 awg from - to your block. And then another 0 awg - to your chasis. Worked for me

Do you have a relay on your fans. Mine id similar things until I wired a relay in.

Also do you have a capacitor?