having big launches doesn't mean faster times, slower is faster...if that makes sense, smoother laps,even if you have to double,single a triple will be faster, when i started racing i always thought bigger motors meant i was faster, now i can take a 17.5 in my sct and run in a mod limited 13.5 class because i know my lines, my lap times are an average a little less than a 1/2 second faster, simply because I'm smoother and run the same lines every lap, where the guys running the 13.5 motors are all over the track trying to make up time they have lost by flipping on jumps, over shooting corners or just simply spinning out under power.