I autocross and take my car to a private track for time trials, I'm starting to face the fact that this is not the best plan because there is now a karting trac

I autocross and take my car to a private track for time trials, I'm starting to face the fact that this is not the best plan because there is now a karting track (0-120 in 6 seconds) that is closer to me. My car, that I justified it's sportiness because of this hobby, is more expensive at the track, burns more, fuel, has more maintenance issues, and could just never perform the 3gs that a kart can.