Introduction
CalTracs are high-performance traction bars designed to enhance vehicle stability and control under the extreme conditions of drag racing. Developed by Calvert Racing, these components require precise installation and adjustment to ensure optimal performance. This guide is based entirely on the official installation documentation, technical specifications, and support information provided by the manufacturer. It covers essential installation procedures, torque specifications, tool requirements, and adjustment techniques for both standard and customized applications.
The following content is structured to guide users through the installation process with clarity and technical precision. All information is drawn from the official CalTracs installation guides, product manuals, and technical support resources provided by Calvert Racing.
Installation Overview and Preparation
Before beginning the installation process, it is essential to understand the key components and tools required. CalTracs installation involves working with pivot assemblies, u-bolts, bushings, and rod ends. The process is designed for vehicles with either standard or flipped suspensions, and specific adjustments are necessary depending on the application.
Kit Contents and Components
- CalTracs Traction Bars: The primary traction bars designed to improve vehicle control during high-torque acceleration.
- Pivot Assemblies: Used to adjust the angle and position of the traction bars.
- U-Bolts: May be included in the kit or require separate purchase. These are used to secure the CalTracs to the leaf springs and axle.
- Rod Ends and Pivot Plates: Allow for fine-tuning of the traction bar’s position and angle.
- Installation Guide: A detailed, illustrated manual is included with every CalTracs kit. This guide is essential for reference during the installation process.
Tools Required
- 1-1/8” Wrenches: Required for adjusting the pivot assemblies.
- Press: Required to press in the aluminum bushings. A hammer or other tools that might damage the bushings should not be used.
- Torque Wrench: Essential for tightening u-bolts and rod ends to the specified torque values.
- CalTracs Wrenches (Optional): A specialized set of wrenches is available for easier adjustment of the pivot assemblies.
- Measuring Tools: Required for custom applications where the vehicle has been modified from stock.
Pre-Installation Considerations
- Vehicle Type: CalTracs can be installed on both standard and flipped trucks. The position of the axle in relation to the leaf springs is critical for determining the correct installation method.
- Modified Applications: If the vehicle has been modified from stock, it is recommended to contact Calvert Racing with detailed measurements to ensure the correct part is ordered.
- Custom Fabrication: For non-standard applications, Calvert Racing offers custom fabrication services. Users are encouraged to provide detailed dimension sheets and any other relevant information that could affect suspension behavior.
Installation Steps for Standard and Flipped Truck Applications
Installation procedures differ slightly depending on whether the vehicle has a standard or flipped suspension. The following steps outline the general process for both types of applications.
1. Preparation and Positioning
- Review the Installation Guide: Before starting, ensure that the installation guide provided with the CalTracs kit is thoroughly reviewed. The guide includes detailed illustrations and step-by-step instructions.
- Position the Vehicle: The vehicle should be jacked up and supported securely using jack stands. Ensure the vehicle is level and stable.
- Remove Stock Suspension Components (if applicable): In some cases, it may be necessary to remove or adjust existing suspension components to accommodate the CalTracs.
2. Installing the Pivot Assemblies
- Install the Pivot Plates: The pivot plates are secured to the rear of the leaf springs using bolts. These plates allow for fine-tuning of the traction bar's position.
- Adjust the Pivot Assemblies: Using a 1-1/8” wrench, adjust the pivot assemblies to the desired position. The number of holes in the pivot plate determines the range of adjustment (typically two, three, or four holes).
- Secure the Pivot Assemblies: Once the pivot assemblies are in the correct position, tighten the bolts to the manufacturer’s specifications.
3. Installing the U-Bolts
- Select the Appropriate U-Bolts: The CalTracs installation requires either round or square u-bolts, depending on whether the axle is above or below the leaf springs.
- Round U-Bolts (Spring UNDER Axle): These are used in standard trucks where the axle is below the leaf springs. The recommended diameter is 1/2”, and the torque specification is 65-70 foot-pounds.
- Square U-Bolts (Spring OVER Axle): These are used in flipped trucks where the axle is above the leaf springs. The recommended diameter is 9/16”, and the torque specification is 90-100 foot-pounds.
- Install and Torque the U-Bolts: After installing the u-bolts, tighten them to the specified torque using a torque wrench. It is also recommended to recheck the u-bolts after running the vehicle on the track a few times and readjust if necessary.
4. Installing the Traction Bars
- Position the Traction Bars: The traction bars are attached to the pivot assemblies and secured using rod ends. These rod ends may be equipped with grease zerks for maintenance.
- Adjust the Rod Ends: The rod ends can be adjusted to fine-tune the position of the traction bars. This adjustment affects how the bars interact with the rear wheels during acceleration.
- Secure the Rod Ends: Once the rod ends are in the correct position, tighten them according to the manufacturer’s specifications.
5. Final Adjustments and Testing
- Test the Installation: After installation, it is recommended to test the vehicle on a drag strip or controlled environment. This allows for further adjustments to be made based on real-world performance.
- Fine-Tune the Pivot Plates: The pivot plates can be adjusted in different holes to optimize performance. The goal is to keep the transfer links as parallel to the ground as possible when the vehicle's weight is on the tires.
- Monitor for Rattle: Some users may experience a slight rattle during acceleration, especially if the truck is run without weight in the back. This is normal and can be mitigated by installing a piece of 3/4 inch heater hose over the roll pin.
Advanced Installation Techniques and Custom Applications
For vehicles with non-standard or heavily modified suspensions, additional steps and considerations are necessary.
1. Custom Fabrication
- Provide Detailed Dimensions: For custom applications, it is important to provide precise measurements to Calvert Racing. This ensures that the parts are fabricated to the correct specifications.
- Include Suspension Details: Any modifications that could affect suspension behavior should be noted. This includes information about tire size, weight distribution, and drivetrain configuration.
- Consult with Calvert Racing: If there is any uncertainty about the correct part or installation method, it is recommended to contact Calvert Racing’s technical support team for guidance.
2. Pinion Angle Considerations
- Recommended Pinion Angle: When using CalTracs, the pinion angle should be between -2 to -4 degrees in relation to the output shaft of the transmission. This helps to ensure smooth power delivery and minimize drivetrain stress.
- Measurement Technique: To measure the pinion angle, the angle of the pinion yoke is added to the angle of the output shaft with the vehicle sitting at rest and weight on the tires.
- Avoid Confusion with Driveshaft Angle: It is important to note that the pinion angle is not the same as the driveshaft angle. The driveshaft angle is not directly related to the performance of the CalTracs.
3. Lubrication and Maintenance
- Grease Zerk Installation: Starting in 2024, standard CalTracs kits now include rod ends equipped with grease zerks. A small amount of grease should be applied to these zerks to help reduce rattle and maintain smooth operation.
- Regular Maintenance: It is recommended to periodically check and tighten all bolts and rod ends, especially after high-performance runs. This helps to maintain the integrity of the installation and ensures optimal performance.
Troubleshooting and Common Issues
Despite careful installation, some common issues may arise during or after the process. Understanding these problems and their solutions is essential for maintaining the performance and longevity of the CalTracs.
1. Over-Tightening of Bolts or Rod Ends
- Issue: Over-tightening can cause the components to bind, preventing them from moving freely as intended.
- Solution: Follow the manufacturer’s torque specifications precisely. If binding is detected, loosen the bolts slightly and recheck the alignment.
2. Rattle During Acceleration
- Issue: A slight rattle may occur during acceleration, especially if the vehicle is run without weight in the back.
- Solution: This is normal and can be mitigated by installing a piece of 3/4 inch heater hose over the roll pin. This cushions the pin against the bar and reduces rattle.
3. Incompatibility with Stock U-Bolts
- Issue: In some cases, the stock u-bolts may not be suitable for use with CalTracs, particularly in high-torque applications.
- Solution: Calvert Racing offers upgraded u-bolts that are better suited for high-performance use. These should be used in place of the stock u-bolts whenever possible.
4. Incorrect Pivot Plate Adjustment
- Issue: If the pivot plates are not adjusted correctly, the transfer links may not be parallel to the ground, affecting traction and performance.
- Solution: Refer to the installation guide and make sure the pivot plates are adjusted to the correct hole positions. Experiment with different settings to find the optimal configuration for the specific application.
Conclusion
The installation of CalTracs requires careful planning, precise execution, and attention to detail. By following the manufacturer’s guidelines, users can ensure that their traction bars are installed correctly and function as intended. Key considerations include selecting the appropriate u-bolts, adjusting the pivot plates for optimal performance, and ensuring that all components are torqued to the correct specifications. Additionally, users should be aware of potential issues such as over-tightening, rattle, and incorrect pivot plate adjustment, and take steps to address these problems as they arise.
For customized or modified applications, it is essential to provide detailed measurements and consult with Calvert Racing’s technical support team. This ensures that the parts are tailored to the specific requirements of the vehicle and that the installation process is as smooth as possible. By adhering to the manufacturer’s recommendations and maintaining the CalTracs system through regular inspection and lubrication, users can maximize the performance and longevity of their high-performance vehicle setup.