The two most important things are tyres and building the car well. Fine tuning the setup should be a long way down the list, the TC6.1 will be good enough to compete with the kit settings, it's a case of getting your thumbs into the groove first.
Make sure you are in the right tyres for the track (the fast local racers should help) and the right tyre additive routine (they should be able to help with that too).
Build the car well to kit settings. Make sure everything that should move moves freely, and everything that shouldn't move stays still. Make sure you set your ride height, cambers and droop according to the kit setup sheet.
With the ESC and motor, just make sure everything is calibrated to the radio for full throttle and full brake and neutral in the right places. You should be able to get a gear ratio to suit the track from the fast racers too. Same with the servo, make sure it is set up to get full lock evenly.
The most important part of racing is track time.
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