DIY Guide: How To Make Golf Cart Faster Electric & Safe

Image Source: i.ytimg.com

DIY Guide: How To Make Golf Cart Faster Electric & Safe

You can make your electric golf cart faster in several ways. This includes upgrading its motor, controller, and batteries. You can also change to high-speed gears and improve its wiring. Safety is key, so always upgrade brakes and steering when adding speed. This guide will show you how to boost your cart’s speed safely and effectively. It covers many simple steps you can do yourself to get more speed.

Assessing Your Current Golf Cart

Before you make any changes, you need to know what your cart can do now. This helps you pick the best upgrades. A quick check of your cart’s parts and how it runs is a good start.

Checking Your Cart’s Speed

First, find out your cart’s current top speed. Most stock golf carts go about 12 to 15 miles per hour (mph). You can use a GPS app on your phone to check its speed accurately. Drive on a flat, safe area. Note the speed. This gives you a baseline.

Inspecting Your Battery System

Your batteries power everything. Their health affects speed and range.
* Voltage: Check the voltage of your battery pack. Most carts are 36-volt (36V) or 48-volt (48V). Count the batteries. Each 6-volt battery adds 6V. Each 8-volt battery adds 8V.
* Age: Old batteries lose power. If your batteries are more than a few years old, they might need replacing.
* Connections: Look at the battery terminals. Make sure they are clean and tight. Loose or dirty connections can cause power loss. This means less speed.

Knowing Your Motor Type

Electric golf carts usually have one of two main motor types:
* Series Motors: These motors offer good torque and can handle high loads. They are often found in older carts. They are strong for hills.
* Shunt (or Sepex) Motors: These motors are more common in newer carts. They offer better speed control and efficiency. They can be tuned for higher speeds more easily. AC motors are even newer and offer great performance. Knowing your motor type helps you pick the right upgrades.

Checking Your Speed Controller

The speed controller manages how much power goes from the batteries to the motor. It limits speed. Look for your controller. Note its brand and amperage rating. A common rating is 275 amps. For more speed, you often need a higher amp controller.

Safety Gear Check

Adding speed means you need better safety. Before any speed changes, check:
* Brakes: Are they strong? Do they stop the cart quickly?
* Tires: Are they in good shape? Do they have enough tread?
* Steering: Is it tight? Does it have any play?
* Suspension: Does it feel stable? Are the shocks good?
Always fix any safety issues before trying to make your cart faster.

Core Speed Enhancements

Making your golf cart faster involves upgrading key parts. These upgrades work together to give you more power and speed.

Electric Golf Cart Motor Upgrade

Upgrading your electric golf cart motor is one of the best ways to get more speed. The motor converts electrical power into motion. A stronger motor means more power to the wheels. This leads to higher speeds.

How a New Motor Helps:
* More Horsepower: Aftermarket motors often have more horsepower than stock motors. More horsepower means faster acceleration and higher top speeds.
* Better Efficiency: New motors can use power more efficiently. This can give you both speed and better battery life.
* Designed for Speed: Some motors are built specifically for speed. Others are for torque. You need to pick the right one for your goal.

Choosing the Right Motor:
* Speed vs. Torque: Think about how you use your cart. Do you want pure speed on flat ground? Or do you need power for hills and off-road use?
* Speed Motors: These are built to spin faster. They give you higher top speeds.
* Torque Motors: These motors provide more pulling power. They are good for climbing hills or carrying heavy loads. A motor designed for speed often trades some torque. A motor with a good balance is often best for general use. The balance between golf cart torque vs speed is key.
* Compatibility: Make sure the new motor works with your cart’s brand and model. Also, check that it matches your controller and battery voltage. A high-power motor needs a high-power controller.
* AC vs. DC Motors:
* DC Motors (Series or Sepex): Many older carts use DC motors. Upgrading these can give good results.
* AC Motors: Newer carts often have AC motor systems. These offer excellent performance and efficiency. An AC motor conversion kit can be a big step up in electric golf cart top speed improvement. But this is a more complex and costly upgrade.

Installation Tips:
* Always disconnect batteries before working on the motor.
* Label wires as you remove them.
* Follow the new motor’s instructions carefully.
* It’s a heavy part. Get help if you need it.

Golf Cart Speed Controller Upgrade

The speed controller acts like the brain of your electric cart. It controls the power flow from the batteries to the motor. The stock controller limits how much power goes through. This also limits your speed. A golf cart speed controller upgrade is vital for faster speeds.

Why Upgrade Your Controller?
* Higher Amperage: Stock controllers might be 275 amps. Upgraded controllers can be 400 amps, 500 amps, or even more. A higher amp controller lets more electricity reach the motor. This makes the motor spin faster and with more force.
* Better Control: Aftermarket controllers offer more precise speed control. Some even allow for programmable settings. You can tune them for more acceleration or higher top speed.
* Handles More Power: If you increase your battery voltage or upgrade your motor, you MUST upgrade your controller. A stock controller cannot handle the extra power. It will overheat or fail.

Choosing the Right Controller:
* Amperage Rating: Match the controller’s amperage to your motor and battery system. A 400-amp controller is a good step up for many carts.
* Voltage Rating: Make sure the controller can handle your battery voltage (e.g., 36V, 48V, 72V).
* Brand and Compatibility: Choose a reputable brand. Ensure the controller fits your specific cart model (EZGO, Club Car, Yamaha, etc.).
* Programmability: Some controllers let you use a laptop or handheld device to change settings. This gives you fine-tuning ability.

Installation Steps:
* Disconnect all batteries first. This is for safety.
* Take photos of the old controller’s wiring before removal.
* Mount the new controller securely.
* Connect wires based on the new controller’s diagram. Thicker wires are often needed for higher amps.

Golf Cart Battery Voltage Increase

One sure way to get more speed is to feed your motor more voltage. A golf cart battery voltage increase directly leads to higher motor RPMs (rotations per minute). This means higher speeds.

How Voltage Boosts Speed:
* 36V to 48V: Many older carts are 36V. Upgrading to 48V is a common and effective change. This adds 12 more volts, giving a noticeable speed jump. You add two 6V batteries or switch to six 8V batteries.
* 48V to 72V: For serious speed, some people go from 48V to 72V. This is a big jump. It will make your cart much faster. But it needs more changes.

What You Need for a Voltage Increase:
* More Batteries: You will need extra batteries or different ones. For example, if you have six 6V batteries (36V), you could add two more 6V batteries to get 48V. Or switch to six 8V batteries (48V).
* New Controller: A higher voltage setup needs a controller that can handle the new voltage. A 36V controller will fail on 48V.
* New Motor: While some motors can handle a slight voltage increase, a large jump (e.g., 36V to 72V) usually requires a new motor designed for that voltage. Otherwise, the motor will overheat and burn out.
* Heavy-Duty Wiring: More voltage and power mean more current. Your old, thin wires might not handle it. They could melt. You need golf cart wiring upgrade for speed.
* New Charger: Your old charger won’t work with the new voltage. You will need a charger specific to your new battery voltage.

Battery Types:
* Lead-Acid Batteries: These are common and cheaper. But they are heavy and need more care.
* Lithium Batteries: These are lighter, last longer, charge faster, and hold a more steady voltage. They are more expensive but offer better performance. They are a great choice for performance builds.

Safety Points:
* Adding voltage creates more power. This demands better braking and steering.
* Battery work can be risky. Always disconnect the main power. Wear safety glasses and gloves.
* Properly vent lead-acid batteries.

High-Speed Gears Golf Cart

Changing the gears in your cart’s rear axle is another way to increase speed. This is a mechanical change. It alters how many times the wheels turn for each turn of the motor.

How Gears Work:
* Gear Ratio: Every golf cart has a gear ratio. For example, a 12.44:1 ratio means the motor spins 12.44 times for the wheels to spin once.
* High-Speed Gears: High-speed gears change this ratio. They lower the number (e.g., to 8:1). This means the wheels spin more times for each motor turn. The result is higher top speed.

Speed vs. Torque Trade-off:
* More Speed, Less Torque: High-speed gears increase your top speed. But they reduce your golf cart torque vs speed. Your cart might feel slower going uphill. It might not accelerate as quickly from a stop.
* Consider Your Use: If you drive mostly on flat ground and want speed, high-speed gears are great. If you use your cart for heavy hauling or on hilly terrain, they might not be the best choice.

When to Install High-Speed Gears:
* If you already upgraded your motor and controller and want even more speed.
* If you want speed without changing electrical parts (though this gives less speed gain).
* They are good for paved surfaces.

Installation:
* This is a more complex job. It involves opening the differential.
* You might need special tools.
* It’s best if you have some mechanical skills or get help from a pro.

Crucial Safety Considerations

Making your golf cart faster makes safety even more important. A faster cart needs better stopping power and control. Never skip these steps.

Upgrading Your Brakes

Stock golf cart brakes are made for stock speeds. When you add speed, they are not enough.
* Disc Brake Kits: Many aftermarket kits replace drum brakes with disc brakes. Disc brakes offer much better stopping power and dissipate heat better. This is a must-do for higher speeds.
* Heavy-Duty Brake Shoes/Pads: If full disc brakes are too much, at least upgrade your brake shoes or pads. Get ones made for performance.
* Brake Cable Check: Ensure your brake cables are in perfect shape. Replace any worn ones.

Tire and Wheel Matters

Tires play a role in speed and safety.
* Larger Tires: Bigger tires can slightly increase top speed. How? They cover more ground with each rotation. But they also put more stress on the motor and controller. They can also affect torque and acceleration. If you increase tire size, you might need a stronger motor and controller.
* Tire Rating: Use tires rated for the speed you expect. Regular golf cart tires are not made for highway speeds. Look for DOT-rated tires if you plan to drive on streets.
* Proper Inflation: Keep tires properly inflated. This improves handling and safety.

Suspension Improvements

A faster cart needs a stable ride.
* Heavy-Duty Leaf Springs: These help support the cart, especially if you add weight (like more batteries). They reduce body roll.
* Upgraded Shocks: Better shocks improve ride comfort and handling. They help keep the tires on the ground over bumps, which is key for control.
* Lift Kits: If you add larger tires, you will need a lift kit. A good lift kit can also improve stability by widening the stance of the cart.

Steering and Stability Enhancements

Keeping control at higher speeds is vital.
* Heavy-Duty Tie Rods and Ends: These parts connect your steering wheel to your wheels. Stronger ones prevent play and improve steering response.
* Wheel Bearings: Check and replace worn wheel bearings. Loose bearings cause wobbles.
* Alignment: After any suspension or steering work, get a wheel alignment. This ensures the wheels point straight.

Lighting and Signals

If you plan to drive your faster cart where cars are, you need proper lighting.
* Headlights and Taillights: Ensure they are bright and working.
* Turn Signals and Brake Lights: These are crucial for telling others what you plan to do.
* Horn: A loud horn is a must for safety.

Boosting Performance: Other Modifications

Beyond the main motor, controller, and battery upgrades, other changes can improve your cart’s speed and reliability. These golf cart performance modifications ensure your system runs smoothly.

Golf Cart Wiring Upgrade for Speed

Your golf cart’s electrical system has wires that carry power. Stock wires are often too thin for higher power demands. When you boost voltage or current (amps), old wires can get hot. They can melt. They can even cause fires. This also causes power loss.

Why Upgrade Wiring?
* Reduce Resistance: Thicker wires have less electrical resistance. This means more power reaches your motor. Less power is lost as heat.
* Prevent Overheating: Thicker wires can handle more current without overheating. This makes your system safer and more reliable.
* Improve Efficiency: A golf cart wiring upgrade for speed ensures your high-power components get the full power they need. This makes your cart run better and faster.

Choosing the Right Wire Gauge:
* Wire gauge refers to the wire’s thickness. Lower gauge numbers mean thicker wire.
* For stock carts, 6 AWG (American Wire Gauge) is common.
* For upgraded 48V systems with 400+ amp controllers, 4 AWG or even 2 AWG is highly recommended.
* For 72V systems or very high-amp setups, 0 AWG (pronounced “zero gauge”) or 00 AWG (“double zero gauge”) might be needed.
* Replace all main battery cables and motor cables.

Installation Tips:
* Always disconnect the main battery pack before touching any wires.
* Use high-quality crimp connectors. Soldering can also be good but needs skill.
* Ensure all connections are clean and tight. Use anti-corrosion grease.
* Route wires neatly and secure them to prevent rubbing or damage.

Heavy-Duty Solenoid

The solenoid is an electrical switch. It connects battery power to the controller and motor when you press the pedal. A stock solenoid might not handle the increased current from an upgraded system.

Why Upgrade Your Solenoid?
* Handle High Amps: A heavy-duty solenoid is built to carry more amps without overheating or welding itself shut.
* Reliability: It ensures a strong, consistent flow of power to your motor. This prevents power drops that can slow your cart.
* Prevent Failure: If your solenoid is too weak for your new power, it will fail quickly. This can leave you stranded.

Choosing a Solenoid:
* Match its voltage to your battery pack (36V, 48V, etc.).
* Choose one rated for higher amps than your controller (e.g., a 400-amp controller needs a 400-amp or 500-amp solenoid).

Heavy-Duty Forward/Reverse Switch

If your cart uses a mechanical forward/reverse switch, this also needs an upgrade. Like the solenoid, the stock switch can’t handle high currents.

Why Upgrade the Switch?
* Prevent Overheating: A stronger switch will not get hot when carrying more power.
* Avoid Welding: Weak switches can “weld” shut, meaning they stick in one direction.
* Reliable Operation: Ensures smooth and safe changes between forward and reverse.

Choosing the Switch:
* Pick one rated for the same or higher amps as your controller.
* Make sure it fits your cart model.

Aftermarket Golf Cart Speed Parts

Many companies make aftermarket golf cart speed parts. These parts are designed to boost performance. You can often buy them in kits.

Common Aftermarket Parts:
* Performance Motors: Designed for higher RPMs and more power.
* High-Amp Controllers: Allow more current flow.
* Heavy-Duty Solenoids and F/R Switches: Handle the increased electrical load.
* High-Speed Gears: Change the final drive ratio for more speed.
* Heavy-Duty Cables: Thicker wires to reduce resistance.
* Lithium Battery Conversions: Lighter, more efficient, longer-lasting power.

Buying Kits:
* Many suppliers offer “speed kits” or “performance kits.” These often bundle a motor, controller, solenoid, and sometimes wiring. This makes buying easier and ensures compatibility.
* Always buy from trusted brands. Read reviews.

Electric Golf Cart Top Speed Improvement: All Together

True electric golf cart top speed improvement comes from a complete system upgrade. Each part helps the others.
* A powerful motor needs a strong controller to feed it enough power.
* A strong controller needs high-voltage batteries and thick wires to deliver the power.
* High-speed gears then take all that power and turn it into maximum wheel speed.
* Without all these parts working together, you won’t get the best speed or reliability. A weak link will limit your gains.

EZGO Golf Cart Speed Increase Specifics

EZGO golf carts are very popular. They have some specific ways to increase speed.
* “Freedom Mode” (for some PDS carts): Some EZGO PDS (Precision Drive System) models have a “freedom mode.” This is a chip or setting that removes the speed limiter. It can increase top speed from 14 mph to 19 mph just by swapping a chip or moving a wire. This is a basic EZGO golf cart speed increase.
* EZGO Controller Upgrades: EZGO carts respond very well to controller upgrades. Alltrax and Navitas are popular brands for EZGO. A 400-amp or 500-amp controller will provide a big speed boost.
* EZGO Motor Upgrades: Companies like D&D Motor Systems and Plum Quick make specific high-performance motors for EZGO carts.
* EZGO RXV Models: These carts use an AC motor system. They are fast from the factory. Upgrading them usually involves an AC controller upgrade or motor swap, which is more complex and costly but yields high speeds.
* EZGO TXT Models: These often have series or Sepex DC motors. They are great candidates for a full motor, controller, and battery upgrade.

No matter the brand, a systematic approach to upgrades gives the best results.

DIY Steps and General Advice

Making these changes yourself can save money. But it requires care and patience.

Planning Your Project

1. Set a Goal: How fast do you want to go? This helps pick the right parts.
2. Set a Budget: Upgrades can add up. Plan your spending.
3. Research Parts: Find the right parts for your cart model. Read reviews.
4. Gather Tools: You’ll need basic hand tools. A multimeter is a must for electrical work. A torque wrench is good for tightening bolts correctly.
5. Read Manuals: Always read the instructions for your new parts.

Essential Tools

• Wrench set and socket set
• Wire strippers and crimpers
• Screwdrivers
• Multimeter (for checking voltage and continuity)
• Battery terminal cleaner
• Safety glasses and gloves
• Zip ties and electrical tape
• Jack and jack stands (for working under the cart)

Step-by-Step Generic Process

This is a general guide. Always follow the specific instructions that come with your new parts.

1. Safety First: Disconnect the main battery pack cable (usually the negative one) from the battery. Tape over the terminal to prevent accidental contact. This removes all power.
2. Document: Take photos of existing wiring before removing anything. Label wires clearly. This helps you put the new parts in correctly.
3. Remove Old Parts: Carefully unbolt and disconnect the old motor, controller, solenoid, or wiring.
4. Clean Area: Clean the mounting areas.
5. Install New Parts:
   • Motor: Mount the new motor. Connect wires using the provided instructions.
   • Controller: Mount the new controller. Connect power, motor, and throttle wires. Pay close attention to positive and negative terminals.
   • Batteries (if upgrading voltage): Install new batteries. Connect them in series for voltage increase. Use new, thick cables.
   • Wiring: Replace old wires with thicker gauge wires. Ensure all connections are clean and tight.
   • Solenoid/Switch: Install new heavy-duty solenoid or F/R switch.
   • Gears: This is the most complex step. If doing it yourself, follow a detailed guide or video specific to your cart’s axle.
6. Double Check: Before reconnecting power, check ALL connections. Make sure they are tight and correct. Look at your photos.
7. Reconnect Battery: Reconnect the main battery cable. Do it carefully.
8. Initial Test: Put the cart on jack stands so the wheels are off the ground. Test the cart at low speed first. Listen for strange noises. Check for smoke or burning smells.
9. Road Test (Safely): Once you’re sure it’s working well on stands, take it for a slow test drive in a safe, open area. Gradually increase speed. Check brakes often.

Maintaining Your Faster Cart

A faster cart puts more stress on its parts. Proper maintenance is even more important now.

Regular Checks

• Battery Terminals: Check them often for corrosion. Keep them clean and tight.
• Wiring: Inspect all cables for fraying, cracks, or loose connections.
• Tire Pressure: Check tire pressure weekly. This affects handling and safety.
• Brakes: Test your brakes before each ride. Check pads/shoes for wear regularly.
• Fluid Levels (for differential): If you changed gears, ensure the differential has the correct fluid level. Check it regularly.
• Steering: Check for any looseness or play in the steering wheel or linkage.

Battery Care

• Charge Correctly: Always use the right charger for your battery type and voltage.
• Don’t Over-Discharge: Try not to run your batteries completely dead. This harms them.
• Keep Them Full: If you have lead-acid batteries, keep them fully charged when not in use.
• Clean: Keep battery tops clean and dry.

General Cleanliness

Keep your motor and controller clean. Dust and dirt can cause them to run hotter. Use compressed air to clean cooling fins on controllers.

Frequently Asked Questions (FAQ)

What is the easiest way to make my golf cart faster?

The easiest way depends on your cart. For some EZGO PDS carts, activating “Freedom Mode” is very easy. For most carts, upgrading the speed controller to a higher amperage one is a straightforward and effective first step.

Can I make my 36V golf cart go 30 mph?

Reaching 30 mph with a 36V cart is very challenging and might not be safe. You would need a full system overhaul: a powerful high-speed 36V motor, a high-amp 36V controller, heavy-duty wiring, high-speed gears, and larger tires. Even then, it would push the limits of a 36V system. Most people upgrade to 48V or 72V to reach speeds above 25 mph reliably and safely.

Will bigger tires make my golf cart faster?

Yes, bigger tires can slightly increase your top speed. This is because they cover more ground with each rotation. However, they also reduce torque and can make your cart feel slower on hills or during acceleration. They also put more strain on your motor and controller, which might need to be upgraded.

Is it safe to increase golf cart speed?

It can be safe if done correctly and completely. Increasing speed requires you to also upgrade your safety features. This means better brakes, stronger suspension, and improved steering. Without these safety upgrades, a faster golf cart can be very dangerous. Always put safety first.

How much does it cost to make a golf cart faster?

The cost varies greatly. A basic controller upgrade might be $300-$600. A full motor and controller kit can range from $800 to $2,000. Adding a voltage increase (new batteries and charger) could add another $1,000-$3,000, especially with lithium. High-speed gears might be $200-$500 for the parts. Safety upgrades like disc brakes can be $300-$700. A complete, high-speed build could easily cost $2,000 to $5,000 or more for parts alone.