Yes, you can disable the governor on a golf cart to increase its top speed. Disabling golf cart speed limiter removal is a popular goal for many cart owners looking to get more out of their vehicle. This guide will walk you through the process for both electric and gas-powered carts, focusing on safe and effective methods for golf cart performance tuning.
Why Golf Carts Have Governors
A governor is a safety device. It stops your golf cart from going too fast. This rule keeps the cart safe for all users. It also protects the motor and battery from too much strain. Most stock carts are set to run at 12 to 15 miles per hour (MPH). Many people want to go faster for personal property use or light off-roading. This desire leads them to look into disabling golf cart governor systems.
Safety First: Before You Begin Modifying Speed
Speed modification changes how your cart handles. It also changes how much stress it puts on the parts. Before you try removing governor on electric cart or gas models, keep these points in mind:
- Local Laws: Check your area’s rules. Street-legal carts have strict speed limits. Going too fast can be illegal.
- Warranty Voidance: Most speed modifications will void your cart’s factory warranty.
- Component Wear: Higher speeds put more wear on tires, brakes, and the motor. Be ready for more maintenance.
- Battery Life (Electric Carts): Pushing the motor harder drains batteries much faster.
Disabling the Governor on Electric Golf Carts
Electric carts use electronic systems to set the speed limit. Disabling golf cart governor usually involves changing settings in the cart’s speed controller. This is often called golf cart electronic speed control adjustment.
Identifying Your Cart Type
Electric carts generally fall into two voltage categories:
- Low Voltage (36-volt systems)
- High Voltage (48-volt systems and above)
The method for adjustment depends heavily on the specific brand and model of your speed controller (like Alltrax, Curtis, or Navitas).
Method 1: Using the Speed Controller Program Key or Toggle
Many newer controllers have a built-in speed adjustment feature. This is the safest way to start golf cart speed adjustment methods.
Step-by-Step Controller Access
- Locate the Controller: Open the main access panel, usually under the seat or under a floor mat. Find the large speed controller box.
- Check for a Key Switch: Some controllers have a small key switch or jumper wire labeled “Tow/Run” or “Speed Select.” If you find a jumper wire with two pins, connecting them might switch between a low-speed mode and a high-speed mode.
- Using a Program Key (If Applicable): If your cart came with a “performance” or “tow/run” key, insert it and turn it to the appropriate setting. This acts as a simple golf cart voltage limiter bypass for low speeds.
Method 2: Programming the Controller via Handheld Device
For advanced controllers, you need a specific programmer or handheld device made by the controller manufacturer. This allows for deep golf cart controller modification.
Required Tools:
- Controller Manufacturer’s Handheld Programmer (e.g., Curtis Model 1314P).
- Laptop with required software (sometimes needed for very advanced tuning).
The Programming Process
- Connect the Programmer: Plug the handheld device into the diagnostic port on the speed controller. The port is usually a multi-pin connector near the main wiring harness.
- Access Settings: Turn the key switch to the “ON” position. The handheld screen will light up. Select “Access Parameters” or “Program Settings.”
- Adjusting Speed Limits: Look for parameters such as “Max Speed,” “Field Weakening Limit,” or “Throttle Limit.”
- Throttle Limit: This sets how much throttle the motor receives. Increasing this percentage (e.g., from 75% to 100%) allows full power.
- RPM Limit: Some controllers let you set a maximum RPM. Be cautious here; exceeding safe RPM can cause motor damage.
- Saving Changes: Once adjustments are made, save the new configuration. Disconnect the programmer. Test the cart carefully at low speeds first.
Method 3: Bypassing the Forward/Reverse Switch Limiter
On some older or lower-end controllers, the reverse setting is electronically limited to a very low speed (often 3 MPH).
- The Bypass: This modification involves wiring a bypass around the speed reduction circuit triggered when the cart is put in reverse. This is complex and highly specific to the controller model. Caution: Doing this improperly can cause the motor to spin the wrong way during the switch, potentially damaging the controller or transmission. This is generally not recommended unless you have detailed wiring diagrams.
Method 4: Upgrading Components for Higher Speed
To truly increase golf cart top speed beyond what the stock controller allows, you may need hardware upgrades. This is where golf cart motor performance upgrade comes into play.
| Component | Why It Matters for Speed | Typical Upgrade Needed |
|---|---|---|
| Controller | Limits current and RPM. | Higher amperage controller (e.g., upgrading from a 250A to a 350A unit). |
| Motor | Determines maximum torque and RPM capacity. | High-speed or high-torque motor designed for higher RPMs. |
| Batteries | Affects overall voltage available under load. | Moving from 36V to 48V, or installing high-output AGM/Lithium batteries. |
If you install a new, higher-rated controller, you might be able to set higher speeds because the new hardware can handle the load. This modification is a key part of serious golf cart performance tuning.
Disabling the Governor on Gas Golf Carts
Gas-powered golf carts (like Yamaha, Club Car Gas, or E-Z-GO Gas) use a mechanical governor connected to the engine. This system physically limits the engine’s maximum Revolutions Per Minute (RPM).
Locating the Mechanical Governor
The governor is usually mounted directly on the engine block. It is connected to the throttle linkage via cables or rods. On many common industrial engines used in carts, the governor system uses centrifugal weights that push against a spring mechanism to control the throttle plate.
Method 1: Adjusting the Governor Tension (The “Looser” Method)
This is the most common technique for disabling golf cart governor on gas models. It involves changing the tension on the governor’s internal spring.
Tools Needed:
- Wrenches or socket set.
- Screwdriver or Allen key set (depending on governor lock nut type).
Procedure for Adjustment
- Access the Governor: Locate the governor assembly on the engine. It will have an adjustment nut or screw that controls the tension on the return spring.
- Identify the Limiter Screw: On many models, there is a locking nut securing an adjustment screw. Loosen the locking nut first.
- Adjusting Tension:
- Tightening the adjustment screw pulls the spring tighter. This allows the engine to spin faster before the weights overcome the spring tension and close the throttle.
- Loosening the screw does the opposite—it lowers the RPM limit.
- To increase golf cart top speed, you need to tighten the spring tension slightly. Turn the adjustment screw in small increments (e.g., half a turn at a time).
- Lock Down: Tighten the locking nut firmly once you reach the desired setting. Do not overtighten, as this could damage the threads.
- Test and Repeat: Test the cart. If the speed is still limited, repeat the adjustment process in small steps. Too much adjustment can cause the engine to run too fast and damage itself.
Method 2: Removing or Bypassing the Governor Linkage (Advanced)
For maximum speed gains, some owners opt to completely remove the governor mechanism. This is highly advanced and risky for the engine.
The Process of Removal
- Disconnect Linkages: Carefully disconnect all cables and rods linking the governor to the throttle body and the engine RPM sensor (if present).
- Bypass Throttle Plate: You must then manually connect the throttle cable directly to the carburetor’s throttle plate. You need to set the throttle plate to open fully when the pedal is pressed to the floor.
- Sealing the Hole: If the governor assembly is bolted directly to the engine case, you must plug the hole securely. Use an appropriate gasket and cover plate to prevent oil or air leaks.
WARNING: When you bypass the governor completely, the engine will rev until it self-destructs if you hold the pedal down too long. This is only for competition carts or controlled environments. This is not recommended for standard use.
Advanced Electric Cart Modifications: Controller and Voltage
If simple programming doesn’t give you the speed you want, you need to look at your golf cart voltage limiter bypass and controller capabilities.
The Role of Voltage
In electric carts, speed is highly dependent on voltage.
- 36V system = Lower potential speed.
- 48V system = Higher potential speed.
- 72V system (often custom) = Highest potential speed.
If you are running 48V but your controller is only rated for 36V, it will limit performance. Upgrading to a controller rated for your battery voltage (or higher) is crucial for performance gains.
Selecting the Right Controller for Performance Tuning
When shopping for a new controller for golf cart performance tuning, look at these specifications:
- Amperage Rating: This dictates how much power the controller can send to the motor. Higher amps mean more torque and potentially higher top speed, provided the motor can handle it. (e.g., 300A or 400A controllers).
- Voltage Compatibility: Ensure it matches or exceeds your current battery bank voltage.
- Programability: Modern controllers (like Navitas or high-end Curtis models) allow for wireless access via Bluetooth apps, making golf cart electronic speed control adjustments easier than using physical programmers.
Motor Performance Upgrades
If your motor hits its RPM ceiling even with a powerful controller, the motor itself is the bottleneck. A golf cart motor performance upgrade usually involves replacing the stock motor with one designed for higher RPMs or higher sustained torque. Note that motors rated for high torque often sacrifice top speed, while high-speed motors may struggle on steep hills. Finding the right balance is key to successful golf cart performance tuning.
Fathoming Tire Size Impact on Perceived Speed
Modifying the governor changes the motor’s output (RPM). However, the final speed the cart travels is also based on tire size. This is a crucial factor often overlooked in golf cart speed adjustment methods.
How Tire Size Affects Speed
Speed is calculated using this basic concept:
$$\text{Speed} \propto \text{Motor RPM} \times \text{Tire Circumference}$$
If your stock cart has 18-inch tires and you install 22-inch tires, the cart will travel farther for every rotation of the motor.
- If you increase tire size by 20% without adjusting the governor, the cart will travel 20% faster, even if the motor RPM remains the same.
- If you disable the governor and increase tire size, the speed gain is multiplied.
Table: Speed Change Based on Tire Diameter Increase (Assuming Governor Disabled)
| Original Tire Diameter (Inches) | New Tire Diameter (Inches) | Speed Increase Factor | Percentage Increase in Speed |
|---|---|---|---|
| 18 | 20 | 1.11 | 11% |
| 18 | 22 | 1.22 | 22% |
| 18 | 23 | 1.28 | 28% |
Caution on Tire Upgrades: Larger tires require more torque to turn, especially from a standstill. If you only increase tire size without upgrading the controller or motor (especially in electric carts), the cart might struggle significantly when starting or going uphill.
Final Checks After Governor Removal or Adjustment
Once you have completed the steps for golf cart speed limiter removal or adjustment, follow these final checks before driving normally.
Electric Cart Checks
- Throttle Response: Test the pedal slowly. Does the acceleration feel smooth, or is it jerky? Jerky movement suggests the throttle mapping in the controller needs refinement.
- Temperature Check: Drive for a short period at the new speed limit. Stop and carefully feel the controller case. It should be warm, but not dangerously hot to the touch. Excessive heat means the components are overloaded.
- Braking Performance: Ensure your brakes can still stop the cart effectively from the new higher speeds. Brake upgrades are highly recommended when increasing speed significantly.
Gas Cart Checks
- Engine Sound: Does the engine sound strained or are you hearing “valve float” (a rattling sound at high RPM)? If so, the governor was set too aggressively, and you must back off the spring tension immediately.
- Oil Leaks: Check the governor housing area for any new oil leaks caused by disturbing the seals or gaskets during adjustment.
- Fuel Consumption: Expect higher fuel usage due to increased engine load.
Frequently Asked Questions (FAQ)
Q: Will removing the governor on my electric cart hurt the motor?
A: It can hurt the motor if you exceed the manufacturer’s recommended maximum RPM rating for that specific motor model, or if you draw too much current for too long without cooling. Always check the motor’s specifications before setting high limits in the controller.
Q: Can I legally drive a modified golf cart on public roads?
A: Usually, no, unless you have specifically modified the cart to meet Low-Speed Vehicle (LSV) regulations, which requires headlights, turn signals, seatbelts, mirrors, and registration. Speed modification alone does not make it street-legal.
Q: What is the easiest way to increase the speed on an older 36V cart?
A: The easiest method involves finding the speed selection jumper wires or utilizing a third-party “speed chip” (if available for your specific controller model) which often acts as a simple golf cart voltage limiter bypass to unlock the full throttle setting. Replacing the controller with a modern, programmable unit is the most effective, though costly, route.
Q: Does changing the solenoid affect the speed limiter?
A: No. The solenoid is an on/off switch for high current from the battery to the controller. It does not set the speed limit; the controller dictates speed via programmed settings or the mechanical governor.
Q: How do I know if my controller is limiting my speed?
A: If you have maximized the throttle input (pedal to the floor) and the cart still accelerates slowly or hits a hard ceiling below its potential, the controller or governor is actively limiting the speed output. For electric carts, this is often a software lock within the golf cart electronic speed control.