Genesis Golf Service Speed & Carts Information  
Speed & Carts Information  

Speed, Motors & Carts
Any modifications you make should comply with local, state & federal laws.
Courtesy of LG

  • If you have a Gas Golf Car:

  1. Install larger tires - the easiest and cheapest way.

  2. Remove the governor - may reduce the life expectancy of the engine. NOT RECOMMENDED

  3. Reset the governor settings to increase torque - a mechanic can do it or provide the technical assistance for do-it-yourselfer.

  4. Change to high-speed gears - maybe the best alternative but use the services of a skilled mechanic to make sure there is no added rear-end noise.

  • If you have an Electric Golf Car:

  1. Install larger tires.

  2. Change to high-speed gears.

  3. Field coil upgrade - most cost effective with adequate results without requiring advanced mechanical skill. Change the field coil in a 2-hp motor (a standard in golf cars) and it can become a 3.5 hp motor. Does not need to upgrade the controller.

  4. Change to a high-speed motor - next easiest but may require changing the controller depending upon the demands made on the motor. See notes on the controllers below.

  5. High-speed gears with high-speed motors is not recommended.  Better option, depending on terrain, is installing a high-speed motor with a high-performance motor controller and using larger tires.

  • Special Notes On Electric Golf Cars:

  • If you set up your electric golf car to go over 25 mph it may result in SERIOUS INJURY OR DEATH.

  • Please note that the Federal Motor Vehicle standard speed for low-speed neighborhood vehicles can not exceed 25 mph.  Thus, do not operate your high-speed golf car on public roads at speeds of more than 25-mph.

  • To calculate the top speed of an electric golf car, use the equation below:
    RPM’s of motor X Tire Radius (in inches) / Gear Ratio X 168 = Miles per Hour
    Example: A golf car with 3000 RPM motor with an 8" tire and a 12.44:1 gear ratio (a standard in golf cars):
    3000 X 8 / 12.44 X 168 = 11.48 mph (standard speed for golf cars)
    • with 10" tires, top speed is 14.35 mph
    • with 12" tires, top speed is 17.23 mph

  • Available gear ratios: 8:1 and 6:1
    • 8" tires, 3000 RPM, 8:1 gear ratio, top speed is 17.85 mph
    • 8" tires, 3000 RPM, 6:1 gear ratio, top speed is 23.81 mph.
    • 12" tires, 4400 RPM, tops speed is 52.38 mph.

  • Standard golf car controllers deliver a maximum of 225-275 amps sufficient for golf car applications and flat ground use. If you wish to install a larger 3.5 or 5 hp motor, it’s small size may cause overheating. You can upgrade the 225-275 controller without them overheating.  However, with a 3.5 or 5 hp motor, a 275 amps controller is sufficient.

  • If you use the car for off-road use, hunting or hill climbing, increase the motor size to 3 hp, 5 hp or 7 hp to give the golf car the needed torque to get uphill faster and for quick acceleration. Again, you should consider upgrading your controller. Genesis Golf offers upgrades to 400 amps and to 500 amps to prevent overheating. In addition, these upgraded controllers increase the voltage in 36-volt cars to 48-volts.

  • If you intend to use your golf car for street-use, we recommend upgrading the controller to handle continuous driving.

  • If you have a 3 hp motor, we recommend upgrading the controller to 400 amps.
    If you have a 5 or 7 hp motor, we recommend upgrading the controller to 500 amps.

  • F-N-R (forward-neutral-reverse) switches may not perform efficiently when using high current motors. We can offer you controllers that will eliminate the F-N-R switch (used with series wound motors) since they are handled by the controller.

  • We can sell you the upgraded high-powered motor 400 or 500 amps controllers for E-Z-GO, Club Car and Yamaha. These are simple and inexpensive alternatives to those offered by the manufacturers.

Clearing the Confusion about DC Motor HP Ratings
By: J. McNamara & D. L. Davis

It's a popular question in the electric golf car motor business. As the leading distributor for General Electric® (GE) golf car motors, the staff at one of our manufacturers, hears it often. "Why is your D380 motor, rated at a mere 5.5 horsepower (HP), faster and more powerful than a competitor's motor rated at 11 or 16 HP?" Though the answer may not be simple, we can clear up some of the confusion.

The main source of confusion is the result of companies rating their motors at or near peak outputs. Though there is nothing wrong with this practice, it is quite misleading. The thing to keep in mind is that peak horsepower output of a direct current (DC) motor cannot be sustained for more than a second or two. If a motor was forced to operate at peak performance for any longer, it would self-destruct.

Our manufacturer has worked with GE's engineers to determine the true sustainable HP rating of our motors. Our ratings are the result of rigorous testing, both at GE's plant, as well as our own. Once the rating has been determined, we label our motors indicating the horsepower at or near the true sustainable output in actual use.

Another factor to consider with horsepower is line/battery resistance. The true output of a DC golf car motor drops even further when the golf car system resistance is factored into the equation. Even the length and diameter of battery cables will affect the output of a motor.

The following chart gives examples of ratings and how they are affected by amperage and resistance, such as the D380 which is rated as high as 36 HP at 48V and 700 amps. As previously mentioned, these are peak ratings, not sustainable ratings which indicate the actual horsepower of the motor. We rate our motors based on output during actual use so you know what you are getting.

The next time you are deciding which motor to use to upgrade a golf car and the salesman is telling you his motor, rated at 11, 16 or whatever horsepower, is better than our 5.5 HP motor (D380), you’ll know that labels don’t tell the whole story. The proof is in the performance and HT Electric’s motors, built by GE, outperform any comparable motor on the market.

Before you buy a motor based solely on label information, ask the salesman if it is rated at "peak" or "sustained" performance. Also ask if line/battery resistance was factored into the calculation. You will surprise him with your knowledge and help clear the confusion about HP ratings for DC motors.


Installation of lift kits or accessories on vehicles should be done by a professional. Genesis assumes no liability for injuries or any other damage as a result of any alterations that are done to the vehicle. The Buyer agrees to indemnify and hold Genesis harmless from and against any and all claims for loss or damage arising out of the acts or omissions of failure to act of the Buyer or any of its agents, servants or contractors in connection with the rendering of services by the Buyer, and for all claims of or damage to property or injury or death of any person directly or indirectly resulting therefrom, including cost and reasonable attorneys fees.