OK, I finally got around to installing and testing the Dirty Parts Alternator mod.
Here's a step-by-step of what I did:
LC was all warmed up after a 30 mile trip.
For reference, a shot of the Voltmeter at idle with the stock setup:
I used a Midtronics tester to test the various parameters:
Charging voltage @ idle with stock setup was 13.54V:
After running the engine @ 2000 RPM for 15 seconds, the "Highest Average Voltage" during those 15 seconds was 13.71V:
Just for kicks, after shutting the engine off and turning on the headlights for 30 seconds to eliminate the surface charge, I measured the CCA which was 950A for a battery rated at 930A:
I then pulled the 5A ALT-S fuse and replaced it with the 7.5A Dirty Parts mod:
I then re-tested charging voltage @ idle and it was 14.16V - an increase of 0.62V over stock:
Then ran the engine @ 2000 RPM for 15 seconds, the "Highest Average Voltage" was 14.35V - an increase of 0.64V over stock:
Finally, a shot of the Voltmeter after install - showing an increase over stock:
Voltages look safe to me, don't think I'm going to blow anything up, and just might get more use out of my AGM battery. I'll keep the 5A fuse I removed handy in case things start to look screwy, but I will run with the mod for awhile.
I hope anyone interested in this mod finds this info useful.
HTH