How to Make an Electric RC Car Motor Go Faster

Written by george m. gonzalez
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RC hobbyists are always looking for ways to make their electric remote control cars go faster. Reducing motor friction is the most efficient method of increasing performance. This article shows you how to increase speed by using specially formulated RC lubricants and by following a maintenance regimen designed to keep your motor running fast for a long time. Keep in mind, however, that the advice outlined in this article is only useful for brushed motors that are commonly included with most ready-to-run vehicles. Brushless motors are for experienced hobbyists and require advanced methods to increase performance and perform maintenance.

Skill level:

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Things you need

  • Electric motor cleaner
  • Bearing /bushing oil
  • Commutator lubricant (comm drops)
  • Commutator cleaning tool (comm stick)
  • Motor brush file
  • Old toothbrush

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  1. 1

    One way to ensure that your motor spins friction free is to keep the bearings or bushings clean and lubricated. Apply one drop of quality RC bearing and bushing oil on each of your motor’s bearings or bushings.

  2. 2

    You should re-lube the bearings or bushing after the vehicle has run for approximately one hour. Unfortunately lubricant attracts dirt, so you’ll need to clean the bearings or bushings before reapplying the lube. An old toothbrush works great to wipe away dirt and grime.

  3. 3

    Apply commutator drops, or “comm drops” as they are referred to in the RC industry, on the motor brushes with the same regularity as you lubricate the bearings or bushings. Comm drops can be applied onto the face of the brushes, or through the motor eyelets or vent holes, and directly on the commutator. Comm drops perform two valuable functions. The drops increase conductivity between the brushes and commutator and they provide lubrication, which cuts down on friction.

  1. 1

    A clean motor is a fast motor. You should thoroughly clean the motor after every two hours of operation. Spray a liberal amount of electric motor cleaner into one of the motor’s vent holes. The solution will spill out along with carbon build-up, dirt, and used lubricant. Keep spraying until the cleaner that pours out of the motor is clean and clear.

  2. 2

    If your motor is re-buildable, remove the brushes and install a commutator cleaning tool (comm stick) inside one of the brush hoods until it makes contact with the commutator. Spin the pinion gear, which will rotate the commutator. Five or six revolutions should be enough to clean the surface of the commutator.

  3. 3

    Lightly file the face of the motor brushes with a small round file. Some commutator cleaning tools have a brush file on the other side of the cleaning tip.

  4. 4

    Apply comm drops on the face of the motor brushes and reinstall them in the motor. Re-lube the bearings or bushings and your motor should be good to go.

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