[riverat1540]

i think u should just get a car battery 800cca shold be more than fine, charge it in the garage before u go to the track and it should last all that u need to use it for the day, most likely more than that, then all u have to do is charge it again before next time and if it does for some kind of reason get to low then all u have to do is open your hood, but i doubt your draining that much in one day