For those wondering about the 16v battery and how it held up. My little puny slow charger would not keep up. I had the battery fully charged when we started and it lasted about 30-35 minutes of the car running before the voltage dropped just below 14v. We then decided to switch out my charger for one of his and kept the 12v charger set at 40 amp setting the entire time, its output voltage was 15.8 and battery voltage remained at 15.8 the entire time on the dyno without any problems.
The ems is using the battery voltage offset and its working perfectly as he set that prior to doing the charger on all the time. Realisticly fully charged I will see 17.2 volts, with the car on and running, about 16.4 volts and it will go down from there. So 15.8 volts was a good number to tune at as far as battery voltage. Ill just have to charge up after each pass. I shouldnt see any lower than 14.8 volts and id imagine from fully charged and doing a run I will stay above 15 volts. Great system and works flawlessly and no belts at all to worry about.