i am guessing at what rpm is at the finish line,i tried looking but it small and don't have much time lol,my speed is 125 right now,,the dragster comes out kinda lazy and then about the time it hits second gear its like a rocket,my 60' is only 1.20 and 5.50 overall,,played with the timing a little,,not real sure there either,but 38 may be the best spot for it,,motor is great,sounds runs good,burn out real good,just needs help getting out of the hole,,,,thanks steve
p.s-i think there want be a big difference in the 456 gear,,433 and 456 is not much differences