I really need some advice here

What he said-traction is king in racing just like shot placement is king in hunting. You said the car is like a go cart, and that's cool, but if the suspension angles, shock and spring rates aren't optimized for thorough transfer of power, you can and will lose traction. Unfortunately, I'm not well-versed in correct suspension setup...but there are probably a few folks on here who could help you out quite well.