whip city was a 3/16 mile track im from that area and raced there, prob know the guy you bought the car from....we run a 14 /51 on 1/4 mile tracks around here... ones a high bank paper clip type track we run a 14/51, the other 1/4 mile track we run a 14/50 its more of a semi banked bull ring..... we only run a 3/8 mile twice a year i usually go 3 less teeth on the rear sprocket to start see what kind of rpms it turns maybe a tooth down or up from there depending on track.... id start with a 14/47 ish