lets get u on track
divide the number of teeth of the pinion into the number of teeth of the spur gear that will give u there ratio
so say if u are using a 64t spur and a 29t pinion that would be 64/29=2.206896551724138.
That means the pinion gear is doing 2.206896551724138 revolutions per 1 revolution of the spur gear
the higher the number the number the faster it will accelerate but it will decrease the top speed.
Keep in mind it increases the torque at the wheels and more prone to wheel spin.
In general terms
If u fit a Larger pinion gear u will loose acceleration and gain more top speed
If u fit a Larger Spur gear u will increase acceleration and loose top speed
If u fit a Smaller Pinion gear u will increase acceleration and loose top speed
If u fit a Smaller u will loose acceleration and gain more top speed
thats a very basic rule tho
Ive found with some setups and small gear changes that the acceleration is not effected
for example say we are running a 19t pinion and go to a 23t pinion we instantly gain more top speed but....
the acceleration remains the same because the motor draws more amps making it a more powerfull setup, the the extra power from the increased amps produces more torque than before and overcomes the change in gearing
In short the more geared up a BRUSHLESS motor is the more power it produces. but if we go to far we run into heat problems.
Here is the thing tho, max power is produced on takeoff from a dead stop, providing there is traction, as soon as it looses traction the power drops off
U could have a crazy brushless combo thats good for 2hp but a drift car would hardly even use 10% of the available power
Drift cars dont really need much power, all they need is speed, providing u are getting wheel spin easly I would be gearing up for more wheel spinning speed