tuned alternator?

[Jackpine]

Originally Posted by jmt0645

I already have a 250 amp mechman alt but the PCM limits it to 14 volts. I was only looking to go to about 14.5 volts

OK, I don't really think 14.5V is a good idea. 14.0V means your battery is fully charged, or you would be reading something lower. I think 14.5 would try to overcharge the battery, and that, of course would hurt it. A 14.0 Volt output also tells me your alternator is fully up to the task.

Finally, your electronics might start to suffer at 14.5 Volts.

To see if your battery is charged, you need to have an Ammeter in series on one of the battery cables. If the Ammeter reads near zero, it means it is not accepting a further charge because it's fully charged. At a resting state, disconnected, and with the surface charge from charging worn off, the battery should show about 12.7 no-load Volts if it's fully charged.

- Jack