That was cold idle. I have the 250amp version. I had to swap to a stock sized pulley from the 3" he recommended.Which KMJ do you have? Was that 14.9V @ idle? I can't get more then 13.8 out of mine, that's at cold start, once it warms up vintage drops sometimes hangs around 11.8 or 11.9
Sent from my SM-S918W using the svtperformance.com mobile app