feigao 8L gearing

well just ordered my first brushless system from rc monster.....the system includes:bk warrior9920 controller, feigao 8L, and cvd's thru the whole drivetrain. i plan on running 14 nihm cell on this setup. i was wondering what size pinion i should run if i plan to run with 66 tooth spur gear???:032: i wanted to run a gearing that is more speed then accleration.....what type of speed our we looking at with this type of setup?????? i'll have pics on profile soon as i get it installed.....:027: :D :018: :)