Quote:

...Battery only wants so much charge.Thats why the reg shuts down when its charged fully......



Thsi part is bunk.

Every chsrging system maintains a steady voltage while the car is running. 13.5 to 14.5 on most. The battery is fully charged at 12.6 to 12.8. I've seen lots of older cars that charge closer to 14.9, without issue. Obviously, a steady charge isn't the problem.

I don't know why the constant voltage race unit isn't recomended for the street(I wouldn't run one on the street myself, simply because I don't see the point), but I would theorize it is related to the temperature compensation that has been mentioned, and perhaps even a reliability stand point. Specified as a race only piece, it may not have as long of a duty cycle as a oem unit.