sorry, I mean the purpose of going to the circuit is not 跑得快啲.
but if you really want to go faster, you can use a better motor, better ESC, better battery, better RC car, better Radio. set ...
I got one of my cars made "pushy" but still I'd rather jink than bump so I prefer the others to have a quicker response. I still think this would be particularly useful at the qualifying stage if I were really at a race.