Making motors faster.
Here are tips to help get the most speed out of your stock or modified motors.
The best way to gain power from these motors is to properly break-in the motor brushes and the bronze bushings. One quick method to break-in the brushes is by using the "water dipping" method. Simply dip the motor in a jar of water, then attached a 3 volt battery supply to run the submerged motor.
You can make a 3-volt battery pack by putting two 1.5-volt batteries in series. DO NOT use a battery charger or electronic speed control (ESC) as a power source for the submerged motor. You might damage your charger or ESC.
This "water dipping" method will also break-in the bronze bushings, which will make the armature rotation smoother, giving you more rpms and power. Another method to break-in the bronze bushings is to attach the motor armature to a drill or Dremel tool. Just be sure not to over do it.
Let the motor dry out, and put 1 or 2 drops of lightweight oil on the bushings. Now your motor should be 20% faster than before.
Hot Tip: Serious racers in the stock motor class usually break-in several of these stock motors. They then test for power by using a dynamometer. The best motors are then used for racing. This is the reason why some stock motors seem to be faster than others.
It is easier to get more speed out of modified motors, primarily because you can change the brushes and advance the timing.
With modified motors, you can disassemble the entire motor. You can "true" the commutator to make it as round as possible and remove the carbon deposits left by arcing and the motor brush.
Brushes play an important role in providing maximum power. The composition (e.g. silver, copper content) and the brush "cut" vary.
Adjusting the motor timing will have a significant impact on performance. In general:
More timing - More rpms, less torque.
Less timing - Less rpms, more torque.
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