Yes, the engine was running at full throttle. This time around the post to post voltage was 12.7, with the lights on 12.6.
Checked the cable connections, they look new and tight. I know appearances can be deceiving - gotta do the cleaning in a little bit. I skipped that, for now, cause I got 12.8 (DC with no AC measured there) coming off the red wire from the engine. That voltage comes from the alternator?
Theory.. I very new to this so...don't laugh. To produce greater than 12 volts, the alternator gets "tweaked" by the regulator? If thats true, then a bad regulator would cause the alternator to output 12v instead of the 13-14v you need. But then again, if the alternator is defective, the regulator can tweak all it wants and the alternator might not boost the voltage. If all the above be true then it we need more information/diagnostics.
I have a hunch my "theory" is sorely lacking... How does the regulator regulate? (my carburetor won't carb, my pistons won't .... )