Understanding the Hurst Roll Control
The Hurst Roll Control is a solenoid-activated valve designed to lock the rear brakes, enabling drivers to perform burnouts or tow vehicles without rear brake engagement. It is typically installed in the engine compartment, near the master cylinder, to ensure proper brake line routing. The system includes a solenoid, mounting bracket, and wiring harness. The solenoid operates by directing brake fluid pressure to lock the rear brakes when activated. Proper installation requires careful mounting to prevent brake line flexing, which could lead to system failure. The Roll Control is often used in performance and racing applications, where precise brake control is essential. Understanding its operation and components is crucial for safe and effective installation.
Preparing for Installation
Before proceeding with the installation of the Hurst Roll Control, proper preparation is essential to ensure a smooth and successful process. This step involves gathering the necessary tools and materials, understanding the system’s components, and planning the installation layout. Failure to prepare adequately can lead to complications, such as improper brake line routing or electrical wiring issues.
Gathering Tools and Materials
To begin, assemble all the tools and materials required for the installation. These typically include:
- A Hurst Roll Control kit, which includes the solenoid, mounting bracket, and wiring harness.
- Brake line fittings (1/4 NPT male fittings are commonly recommended for the solenoid ports).
- A brake line template gauge to ensure correct sizing of fittings and lines.
- Wrenches and sockets for brake line connections.
- 18-gauge wire for electrical connections.
- Male terminals for wiring.
- Mounting hardware (e.g., bolts, nuts) for securing the solenoid.
Ensure all components are compatible with your vehicle’s brake system, especially if you have a single-circuit or dual-circuit master cylinder. Consult the Hurst Roll Control instructions or a professional if you’re unsure about compatibility.
Choosing the Mounting Location
The mounting location of the Hurst Roll Control solenoid is critical for proper functionality. The solenoid should be mounted in the engine compartment, preferably near the master cylinder, to minimize brake line length and prevent flexing. A common choice is the firewall or a sturdy bracket near the master cylinder. Avoid areas exposed to excessive heat or moisture, as this could damage the solenoid or wiring.
Once the mounting location is selected, use the provided bracket to secure the solenoid firmly. Double-check that the solenoid is level and accessible for future maintenance or adjustments.
Preparing Brake Lines
Brake lines must be properly sized and fitted to ensure reliable operation of the Roll Control system. Use the template gauge provided in the kit to determine the correct size of fittings and lines. Incorrect sizing can lead to leaks or insufficient brake pressure, which could result in system failure.
If your vehicle has a single-circuit master cylinder, you may need additional fittings, such as a T-fitting, to accommodate the solenoid. For dual-circuit systems, ensure the front and rear brake lines are properly identified and routed to avoid cross-connection. Always use high-quality brake lines that meet or exceed OEM specifications to maintain safety and performance.
Planning Electrical Wiring
The Hurst Roll Control requires a 12V power source to activate the solenoid. Plan the wiring route carefully to avoid interference with other electrical components or exposure to heat sources. Use 18-gauge wire for the connections, as it provides sufficient current capacity while remaining flexible and easy to route.
Connect the wiring to the solenoid terminals, ensuring the correct polarity (positive and negative). If your vehicle has an ignition-controlled power source, connect the wiring to a switched circuit to prevent battery drain when the ignition is off. Test the wiring connections before finalizing the installation to ensure proper operation.
Final Preparations
Before proceeding with the mechanical installation, double-check all components for damage or defects. Inspect the solenoid, mounting bracket, and wiring harness for any signs of wear or damage. If any issues are found, address them immediately to avoid delays during installation.
Review the installation instructions provided with the Hurst Roll Control kit and familiarize yourself with the steps outlined in the following sections. If you’re unsure about any part of the process, consider consulting a professional mechanic or brake specialist to ensure the installation is done safely and correctly.
Mechanical Installation Steps
The mechanical installation of the Hurst Roll Control involves mounting the solenoid, modifying the brake lines, and connecting the system to your vehicle’s master cylinder. This process requires careful attention to detail to ensure proper functionality and safety. Follow these steps to complete the mechanical installation:
Step 1: Mount the Solenoid
Begin by mounting the Hurst Roll Control solenoid in the engine compartment. Choose a location close to the master cylinder to minimize brake line length and prevent flexing. A common mounting spot is the firewall or a sturdy bracket near the master cylinder. Ensure the solenoid is securely fastened using the provided mounting bracket and hardware. Avoid areas exposed to excessive heat, moisture, or vibration, as these could damage the solenoid or compromise its performance.
Step 2: Remove and Modify Brake Lines
Locate the front brake line connected to the master cylinder. Remove this line from the master cylinder port and attach it to the inlet port of the Hurst Roll Control solenoid. This step redirects the brake fluid flow through the solenoid, enabling it to control the rear brakes. Use the correct 1/4 NPT fittings to ensure a leak-free connection. If your vehicle has a single-circuit master cylinder, you may need to install a T-fitting or additional adapters to accommodate the solenoid; Consult the template gauge provided in the kit to determine the correct fitting sizes.
Step 3: Install the Roll Control Valve
Once the solenoid is mounted and the inlet port is connected, install a short brake line from the outlet port of the Roll Control solenoid back to the master cylinder. This line allows the solenoid to regulate brake fluid pressure to the rear brakes. Use high-quality brake lines that meet or exceed OEM specifications to ensure reliability and safety. Tighten all connections securely to prevent leaks or fluid loss.
Step 4: Bleed the Brake System
After completing the mechanical installation, bleed the brake system to remove any air bubbles that may have entered the lines during the process. Use a brake bleeding kit and follow the manufacturer’s instructions to ensure the system is free of air. Proper bleeding is critical for maintaining consistent brake performance and preventing spongy brake pedals.
Step 5: Test the System
Before driving the vehicle, test the Hurst Roll Control system to ensure it functions correctly. With the ignition switch in the “ON” position, press the brake pedal several times to prime the system. Activate the Roll Control solenoid (if equipped with a switch) and check for proper rear brake engagement. Release the solenoid and verify that the rear brakes disengage completely. Repeat this process several times to confirm consistent operation.
Important Considerations
During the mechanical installation, pay close attention to the routing of brake lines to avoid kinking or damage. Use the template gauge to ensure all fittings are properly sized, and double-check all connections for tightness. If you encounter any issues, such as leaking lines or inconsistent brake performance, address them immediately before driving the vehicle. Consult the Hurst Roll Control instructions or seek assistance from a qualified mechanic if you are unsure about any step in the process.
By following these mechanical installation steps carefully, you can ensure that your Hurst Roll Control system is installed correctly and functions as intended. Proper installation is essential for maintaining brake performance, safety, and reliability. Proceed to the next section for guidance on electrical wiring and system activation.
Electrical Wiring
Electrical wiring is a critical step in the installation of the Hurst Roll Control system. Proper wiring ensures that the solenoid operates correctly, engaging and disengaging the rear brakes as needed. Follow these steps to complete the electrical wiring for your Hurst Roll Control:
Step 1: Identify the Components
Before starting, familiarize yourself with the electrical components included in the Hurst Roll Control kit. These typically include the solenoid, a wiring harness, male terminals, and an 18-gauge wire. You may also need additional materials such as a fuse, fuse holder, and a relay, depending on your vehicle’s electrical system requirements.
Step 2: Connect the Solenoid to the Battery
Locate your vehicle’s battery and connect the positive terminal to the solenoid. Use an 18-gauge wire to ensure adequate current flow. Attach one end of the wire to the positive battery terminal and the other end to the “input” or “power” terminal on the solenoid. This connection supplies the necessary power to activate the solenoid.
Step 3: Ground the Solenoid
Proper grounding is essential for the solenoid to function correctly. Attach the ground wire to a clean, bare metal surface on the vehicle’s chassis. Ensure the connection is secure and free from rust or paint to maintain good conductivity. Connect the other end of the ground wire to the designated ground terminal on the solenoid.
Step 4: Install a Fuse
To protect the electrical system from overcurrent, install a fuse holder and fuse along the positive wire connected to the solenoid. Choose a fuse with a rating of 10-15 amps, depending on your vehicle’s specifications. Mount the fuse holder in an accessible location, such as under the dashboard or near the battery. This will allow for easy replacement if the fuse blows.
Step 5: Connect the Switch
Install a switch to control the solenoid activation. Mount the switch in a convenient location, such as on the dashboard or center console. Connect one end of the switch wiring to the “control” terminal on the solenoid and the other end to a 12V power source, such as an accessory circuit. This allows you to manually engage and disengage the Roll Control system as needed.
Step 6: Use a Relay (Optional)
If your vehicle’s electrical system requires it, install a relay to handle the higher current draw of the solenoid. Connect the relay between the switch and the solenoid, following the manufacturer’s wiring diagram. This step is particularly important for vehicles with sensitive electrical systems or those that experience voltage drops.
Step 7: Test the Electrical System
Before finalizing the installation, test the electrical system to ensure it functions correctly. Turn the ignition switch to the “ON” position and activate the Roll Control switch. You should hear the solenoid engage, and the rear brakes should lock. Release the switch to disengage the solenoid and verify that the rear brakes return to normal operation. If the system does not function as expected, check all connections and ensure the wiring is correct.
Important Tips and Considerations
- Use the Correct Wire Gauge: Always use 18-gauge or heavier wire to prevent overheating and ensure reliable operation.
- Ensure Proper Grounding: A poor ground connection can cause erratic solenoid behavior or complete system failure.
- Follow Vehicle-Specific Wiring Diagrams: Consult your vehicle’s wiring diagram to identify suitable power sources and ensure compatibility with your electrical system.
- Install a Fuse: A fuse protects your electrical system from damage in case of a short circuit or overload.
- Avoid Routing Wires Near Heat Sources: Keep wires away from exhaust systems, engines, and other high-temperature components to prevent damage.
Final Checks
Once the electrical wiring is complete, perform a final inspection to ensure all connections are secure and properly insulated. Test the system again to confirm that the solenoid engages and disengages smoothly. If you encounter any issues, such as intermittent operation or electrical noise, check for loose connections, faulty wiring, or improper grounding.
By following these electrical wiring steps, you can ensure that your Hurst Roll Control system operates safely and efficiently. Proceed to the next section for guidance on troubleshooting common issues that may arise during or after installation.
Troubleshooting Common Issues
During the installation or operation of the Hurst Roll Control system, you may encounter certain issues that require troubleshooting. Identifying and resolving these problems promptly ensures proper system functionality and safety. Below are some common issues and their solutions to help you address them effectively.
Solenoid Not Engaging
If the solenoid fails to engage when the switch is activated, it could be due to electrical issues. Check the wiring connections to ensure they are secure and free from corrosion. Verify that the positive wire is connected to the correct terminal and that the ground wire is properly attached to a bare metal surface. If the wiring appears intact, test the solenoid by bypassing the switch and directly applying power to the solenoid terminals using a jumper wire. If the solenoid engages in this test, the issue lies with the switch or its wiring. Replace the switch if necessary. If the solenoid still does not engage, it may be faulty and require replacement.
Rear Brakes Not Locking
If the rear brakes fail to lock when the Roll Control is activated, inspect the brake lines for leaks or damage. Ensure that all connections are tight and that the brake fluid level is adequate. If the brake lines are damaged, replace them with the correct size and type of brake lines. Additionally, check the solenoid for proper operation, as a malfunctioning solenoid may not direct fluid pressure correctly. If the issue persists, consult a professional mechanic to inspect the entire brake system for internal damage or blockages.
Intermittent Operation
Intermittent operation of the Roll Control system is often caused by loose or corroded electrical connections. Inspect the wiring harness and connections to the solenoid, switch, and battery. Clean or replace any corroded connectors and ensure all terminals are securely fastened. If the issue persists, check for voltage drops using a multimeter. A voltage drop exceeding 1V indicates a problem with the wiring or connections. Addressing these issues should restore consistent operation of the system.
Blown Fuse or Tripped Circuit Breaker
A blown fuse or tripped circuit breaker may occur due to a short circuit in the wiring or excessive current draw. Inspect the wiring for any signs of damage, such as cuts, burns, or frays. Repair or replace the damaged wiring and ensure all connections are secure. If the issue recurs, check the solenoid for proper operation, as a faulty solenoid may draw excessive current. Replace the solenoid if necessary. Always use a fuse with the correct amp rating to protect the electrical system.
Brake Pedal Requires Multiple Pumps
In some cases, the brake pedal may need to be pumped multiple times for the front brakes to engage after using the Roll Control. This issue is typically related to air in the brake lines or improper bleeding of the system. Bleed the brake system thoroughly to remove any air bubbles. If the problem persists, inspect the master cylinder for leaks or damage. Ensure the brake lines are properly routed and not kinked, as this can restrict fluid flow. If the issue continues, consult a professional mechanic to inspect the entire brake system.
Solenoid Noise or Vibration
Unusual noise or vibration from the solenoid during operation may indicate improper mounting or wear. Ensure the solenoid is securely fastened to a stable surface using the provided mounting bracket. Tighten any loose bolts or screws. If the noise persists, inspect the solenoid for internal damage or wear. Replace the solenoid if necessary. Proper mounting and maintenance will prevent such issues and ensure smooth operation of the Roll Control system.
General Troubleshooting Tips
- Use a Multimeter: A multimeter can help diagnose electrical issues by measuring voltage, current, and resistance in the wiring and components.
- Inspect Brake Fluid Levels: Low brake fluid levels can cause poor system performance. Always maintain the recommended fluid level and use the correct type of brake fluid for your vehicle.
- Check for Leaks: Regularly inspect brake lines and connections for leaks, which can lead to system failure. Replace any damaged components promptly.
- Consult the Manual: Refer to the Hurst Roll Control installation manual for specific troubleshooting guidelines and diagrams.
- Seek Professional Help: If you are unable to resolve an issue on your own, consult a qualified mechanic with experience in brake systems and electrical diagnostics.
Troubleshooting common issues with the Hurst Roll Control system requires patience and attention to detail. By systematically identifying and addressing problems, you can ensure the system operates safely and efficiently. Regular maintenance and inspections will help prevent many of these issues from arising in the future. If you encounter persistent or complex problems, do not hesitate to seek assistance from a professional to avoid compromising your vehicle’s safety and performance.
Vehicle Specific Considerations
When installing the Hurst Roll Control system, it is essential to consider the specific characteristics of your vehicle. Different vehicles may require unique approaches due to variations in brake systems, master cylinder configurations, and wiring setups. Understanding these vehicle-specific considerations will ensure a successful installation and proper system operation.
Domestic Muscle Cars
Domestic muscle cars, such as Ford Mustangs, Chevrolet Camaros, and Dodge Challengers, often have compatible brake systems for the Hurst Roll Control. These vehicles typically feature dual-circuit master cylinders, which simplify the installation process. However, ensure that the solenoid is mounted in a location that avoids heat exposure from the engine or exhaust system. Additionally, verify the size and type of brake lines to ensure compatibility with the Hurst system. For example, some muscle cars may require adapters to connect the solenoid to the master cylinder properly.
Late-Model Vehicles
Late-model vehicles, particularly those with advanced ABS systems, may require additional considerations. The Hurst Roll Control is designed to work with traditional brake systems, and installing it on vehicles with ABS may require bypassing certain electronic controls. Consult your vehicle’s service manual or a qualified mechanic to ensure compatibility. Furthermore, late-model vehicles often have complex wiring systems, so careful planning is needed to integrate the Roll Control’s electrical components without interfering with other vehicle functions.
Classic Cars
Classic cars often have simpler brake systems, making the Hurst Roll Control a popular upgrade for drag racing and performance applications. However, these vehicles may have smaller master cylinders or different brake line configurations. It is crucial to measure and adapt the brake lines to fit the solenoid properly. Additionally, classic cars may not have the same level of wiring infrastructure as modern vehicles, so you may need to run additional wires or install a relay to power the solenoid. Always use high-quality, heat-resistant wiring to ensure reliability.
Trucks and SUVs
Trucks and SUVs often have heavier-duty brake systems, which can be advantageous when installing the Hurst Roll Control. However, these vehicles may have longer brake lines or different master cylinder configurations that require additional planning. Ensure that the solenoid is mounted securely to withstand the rigors of off-road or heavy-duty use. Additionally, trucks and SUVs may have larger wheels or heavier payloads, so proper brake system maintenance is critical to ensure safety and performance.
Racing Vehicles
Racing vehicles often have highly modified brake systems, which may require custom installation of the Hurst Roll Control. If your vehicle has a custom master cylinder or brake line setup, consult with a professional to ensure the solenoid is integrated correctly. Racing applications may also demand higher-duty-cycle solenoids or additional cooling measures to prevent overheating. Always follow the manufacturer’s guidelines for maximum operating conditions and consider upgrading to a high-performance solenoid if necessary.
General Vehicle-Specific Tips
- Wiring and Electrical Systems: Always consult your vehicle’s wiring diagram to identify the correct power source and ground locations. Use a relay if necessary to handle the solenoid’s current draw without overloading the vehicle’s electrical system.
- Brake Fluid Compatibility: Ensure that the brake fluid used in your vehicle is compatible with the Hurst Roll Control system. Most systems are designed to work with standard DOT 3 or DOT 4 brake fluids, but verify compatibility before installation.
- Mounting Locations: Choose a mounting location for the solenoid that is close to the master cylinder to minimize brake line length and potential for leaks. Avoid areas exposed to direct heat or moisture.
- Testing: After installation, test the Roll Control system thoroughly before driving the vehicle. Ensure that the rear brakes lock properly when activated and that the front brakes function normally after deactivation.
- Consult a Professional: If you are unsure about any aspect of the installation, consult a qualified mechanic with experience in brake systems and electrical wiring. Improper installation can lead to safety hazards and system failure.
Vehicle-specific considerations play a crucial role in the successful installation of the Hurst Roll Control system. By understanding your vehicle’s unique characteristics and adapting the installation process accordingly, you can ensure reliable operation and optimal performance. Whether you’re working on a classic car, a late-model vehicle, or a racing machine, careful planning and attention to detail will help you achieve the desired results. Always follow the manufacturer’s guidelines and seek professional assistance if needed to guarantee safety and satisfaction.
Final Steps and Safety
After completing the mechanical and electrical installation of the Hurst Roll Control system, it is essential to follow the final steps to ensure proper functionality and safety. These steps include testing the system, performing safety checks, and ensuring all components are securely installed. Properly completing these steps will help prevent potential issues and ensure reliable operation of the Roll Control system.
Final Inspection
Before operating the vehicle, conduct a thorough inspection of the entire installation. Check all brake lines for proper routing, secure connections, and any signs of damage or leaks. Ensure that the solenoid is firmly mounted and that its electrical connections are secure. Verify that the wiring harness is properly routed and protected from heat sources, such as the engine or exhaust system. Inspect the master cylinder and brake lines for any modifications made during the installation process. Make sure all fittings, adapters, and connections are tight and free from leaks.
Testing the System
Once the installation is complete, test the Hurst Roll Control system to ensure it functions as intended. Begin by turning the ignition switch to the “ON” position and fully depressing the brake pedal to engage the system. You should hear the solenoid activate, and the rear brakes should lock. Release the brake pedal and verify that the rear brakes disengage properly. Repeat this process several times to ensure consistent operation. If the system does not activate or deactivate correctly, refer to the troubleshooting section of the manual or consult a qualified mechanic.
Safety Checks
Safety is paramount when working with brake systems. After testing the Roll Control system, perform a series of safety checks to ensure the vehicle is safe to operate. Start by checking the brake pedal for proper feel and resistance. If the pedal feels spongy or soft, it may indicate a problem with the brake fluid or master cylinder. Next, test the vehicle’s stopping ability by driving at a slow speed and gently applying the brakes. Ensure that the vehicle stops evenly and without pulling to one side. Finally, perform a burnout or towing maneuver to verify that the Roll Control system engages and disengages correctly under load.
Post-Installation Maintenance
To maintain the reliability and performance of the Hurst Roll Control system, regular maintenance is essential. Inspect the brake lines and fittings periodically for signs of wear, corrosion, or leaks. Replace any damaged or corroded components immediately to prevent system failure. Check the solenoid for proper operation and ensure that its electrical connections remain secure. Additionally, test the system periodically to ensure it is functioning as intended. Proper maintenance will help extend the life of the Roll Control system and ensure consistent performance.
Documentation and Record Keeping
Keep detailed records of the installation process, including any modifications made to the brake system or wiring. Document the results of your tests and inspections, and note any issues that arise during operation. This documentation will be helpful if you need to troubleshoot the system in the future or if you decide to sell the vehicle. Additionally, keep a copy of the Hurst Roll Control installation manual and any other relevant documentation in the vehicle for future reference.
Final Safety Reminder
The Hurst Roll Control system is a powerful tool that, when used improperly, can pose safety risks. Always use the system responsibly and in accordance with the manufacturer’s instructions. Never engage the Roll Control system while driving at high speeds or in traffic, as this can lead to loss of control and accidents. Use the system only for its intended purposes, such as burnouts or towing, and always follow proper safety protocols. Remember that the safety of yourself and others depends on the proper installation and operation of the Roll Control system.
Completing the final steps and ensuring safety are critical components of the Hurst Roll Control installation process. By following the steps outlined in this section, you can ensure that the system is installed correctly, functions as intended, and operates safely. Proper testing, inspection, and maintenance will help prevent potential issues and ensure reliable performance. Always prioritize safety when working with brake systems, and seek professional assistance if you are unsure about any aspect of the installation or operation. With careful attention to detail and adherence to the manufacturer’s guidelines, you can enjoy the benefits of the Hurst Roll Control system for years to come.