If your fully charged battery drops below 10.8 volts while cranking replace it. Fully charge your battery, put a load test on it, if it drops below 10.8 volts the battery is junk. For racing if it dropped below 11.4 volts I would replace it.
New best 10.18 , 1.40 60 ft 496 Scott Brown built, street driven 3600 lbs,654 hp , 653 ft tq
