First off, Optima batteries should be trickle charged vs. a fast charger-that's how they get burned up. And Supe, do you have all of your accessories ran off your battery or through your alternator directly? If you swap to a later style 100+ amp alternator and wire your system to take advantage of the remote voltage sensing, you should never have any charging problems running at the track. I can even set you up with a reliable 200 amp upgrade kit if you are running a 6" cased GM alternator. Email or PM me for ideas on how to configure your charging system a little better! -Jabin