Had a chance to get some testing done on the kart and am really happy with the results so far.
I did 15 continuous minutes of laps at race pace to see how the battery faired. The typical time for a feature race at our local track is ~11 minutes, heat races ~5 mins
Battery started at 95% charge and ended at 25% so I am very happy with how the testing went. I do need to adjust the low voltage protection on the controller as my last 2 laps the power draw was reduced.