Well, you can chalk this one up to a rookie mistake. There is a big difference between resting voltage in a battery pack and voltage under load. To keep the batteries safe, I want to keep them above 3.0 volts per cell. 3.0 x 48 = 144, so that's what I set the low voltage to. Well, they hit that when under load almost right away, which caused the Zilla to limit it's duty cycle to 25%.
Working with Ryan at EV Source, he recommended that I drop that to around 112 and see if that did it. Boy did it ever, I spun the tires quite easily.
I'll be posting more on the acceleration once I get the brakes working again. So stay tuned.