[captain harlock]

You might decrease the cogging problem with higher voltage.

Also, im my Futaba 3PK and some other transmitters, you can adjust your motor's acceleration so that it jumps directly from the lowest point of acceleration to a haigher level of acceleration. It simply wont cog since you are actually taking off from like 10% of acceleration. You can actually make your car launch at 100% of acceleration by only touching the throttle trigger, but 5-10% is very ideal.
Hope you have this feature in your radio.