shoemike

iTrader: (25)

I logged battery voltage and above 4800RPM
voltage drops to just around 12.5v.
Idle and below 4800RPM are fine. (13.5v)

This is with a 200 AMP alternator,
2AWG battery cables, an Optima red top that are less than a year old,
and an UD pulley.

My stereo system is upgraded but nothing special,
and I power a laptop with V2 Flashscan for data logging.

Should I change the alternator pulley?
The stock alternator pulley is around 11% bigger than the Load Boss.

dragonrage

I bet you gained a whole ton of power with that UDP. I'm guessing around 0%.

shoemike

iTrader: (25)

Actually it replaced a broken stocker.
IIRC there was a dip in voltage with it and the stock alternator.
I'm wondering why there is a drop at high RPM.

BRD-PREY

iTrader: (5)

Isn't this backward?? Voltage should be a problem at lower rpm not higher right. If you were going to have a problem.

shoemike

iTrader: (25)

I suspect my belt is slipping at higher RPM.