when u finaaly do get good traction yr mph drops but yr time gets quicker
could also be what gear u cross the line in
my old car i used to get just b4 the finish line and have to decide whether to change into 5th gear of rev the ring out of the engine it never seemed to make much difference
i know most guys run around a 4.1 diff ratio
then about a 26 inch tall tyre
there is shitloads to much round with
but i think best thing is to be is where yr engine makes max hp as in revs and in 4th gear goin across the finish line