[GhettoPop]

i have a PaPerformance 130amp alt w/ March 1000 underdrives. i charge at about 13.5 volts at idle, thats according to my autometer gauges which draws its reading from my ignition switch. I assume if i connected a voltmeter to the battery it might read even higher. at idle w/ the lights on and a/c, the gauge will read around 12.5 volts. i did upgrade the wire from alt to starter relay to 4 gauge as it was recommended by PaPerformance. I also upgraded my battery cables and starter power wires to 4 gauge.

i would try to upgrade your alt wire to starter relay, i doubt the factory wire is large enough to make use of all the power the alt is producing. if you want more juice, change the size of the alt pulley and i would leave the underdrive crank pulley alone.