BC Racing coilover kits are designed to deliver enhanced performance, adjustability, and handling improvements for a wide range of vehicles. While the installation process may vary slightly depending on the make, model, and generation of the vehicle, several key considerations and procedures are consistent across BC Racing's product lineup. This article outlines the essential information derived from user inquiries, technical tips, and manufacturer documentation, with an emphasis on installation prerequisites, customization options, and post-installation recommendations.
Installation Prerequisites and Technical Challenges
Installing BC Racing coilovers typically involves removing the factory suspension components and replacing them with the supplied coilover assemblies. While BC Racing provides instructions in some kits, many users have noted the difficulty in locating comprehensive installation guides on the company’s website. In some cases, the company includes instructions within the packaging, but these are not always available for download or direct access.
For certain vehicle models—such as the E30, Q45, and early Nissan Z series—the OEM suspension design integrates the lower mount into the knuckle as a single unit. In these cases, the lower mount must be welded to the knuckle to ensure proper fitment and structural integrity. BC Racing includes installation instructions for such scenarios, but professional installation is strongly recommended due to the welding requirement and the complexity of the task.
Users with experience in G37 or Nissan 370Z models have noted that the installation process is similar, with some variations in hardware and mounting specifications. The availability of user forums and online communities has helped fill the gap in official documentation, with enthusiasts sharing step-by-step guides, photos, and warnings about potential pitfalls.
Spring and Damper Specifications
BC Racing coilovers are engineered to provide a balance between street comfort and track performance. Standard kits are generally tuned for a moderate drop from the factory ride height and include springs that are approximately 15–20% stiffer than OEM components. The damping characteristics are also adjusted, with valving that is typically 20–30% stiffer than the original suspension system. These specifications allow for improved handling while maintaining a level of comfort suitable for daily driving.
For users seeking a more aggressive lowering effect, BC Racing offers “extreme low” kits, which provide roughly 1 inch additional drop compared to standard kits. These kits may include shorter springs and/or dampers, depending on the vehicle and suspension geometry. It is important to note that extreme low kits are not always accompanied by stiffer spring rates—this will depend on the specific build and model requirements.
Custom spring rates are available for specialized applications, such as track-only vehicles or heavily modified cars with unique weight distributions or tire setups. When spring rates are modified, the damper valving is also adjusted to match the new suspension characteristics. However, BC Racing recommends using custom rates only in specific cases—such as for track use, to accommodate large-tread tires, or to fine-tune handling characteristics—rather than for general street use.
Hardware Variations and Vehicle-Specific Considerations
The hardware included in BC Racing coilover kits is not uniform across all models. Lock rings, top nuts, spanner wrenches, and other mounting components vary depending on the vehicle platform. For example, some models require end links due to the sway bar mounting position, while others do not. BC Racing includes end links in kits where they are necessary, but they are omitted in cases where they are not required.
Users are advised to contact BC Racing’s sales department via phone or email to confirm the correct specifications and hardware for their specific vehicle. This is especially important for models with different chassis codes or those with on-center versus off-center top plates. BC Racing offers camber/caster plates for certain models that use off-center top plates, and these must be ordered separately or included during the build process.
Custom coilover kits require a lead time of 2–3 weeks due to the need for specialized components and valving adjustments. BC Racing emphasizes that they are a leader in custom coilover production and offer faster turnaround times compared to many competitors. For those seeking off-the-shelf kits, in-stock models generally ship within 24 hours, while out-of-stock models may require additional lead time.
Post-Installation Recommendations and Maintenance
After installation, BC Racing recommends an alignment to ensure proper suspension geometry, particularly if the ride height has been significantly adjusted. An alignment should be performed approximately one week after the initial installation or major height changes, as settling of the suspension components can affect wheel alignment. Failure to perform an alignment may result in uneven tire wear and compromised handling.
Corner balancing is another consideration for users looking to optimize their suspension setup. While not necessary for the average driver, corner balancing can be beneficial for those planning to use the vehicle heavily on the track or for those with fully prepped race cars. BC Racing notes that the benefits of corner balancing are most pronounced in high-performance or race-focused applications.
Customization and Vehicle-Specific Adjustments
The adjustability of BC Racing coilovers is a key selling point for many users. Out-of-the-box settings are designed for a moderate drop and mid-range damping, which can be fine-tuned based on the user’s preferences and driving conditions. Pre-load settings are factory-set, eliminating the need for immediate adjustment unless the user desires a specific setup.
For users with track-prepped vehicles, BC Racing offers the option to customize both spring and damper valving to better suit the demands of high-performance driving. These customizations are typically reserved for those who have already experimented with standard spring rates or for vehicles with supporting modifications that require stiffer suspension components.
Ordering and Support
BC Racing North America transitioned to a new ordering system, Netsuites, in March 2023, phasing out the previous Nowcommerce platform. Users were advised to complete orders prior to February 24, 2023, to ensure access to order history and fulfillment details. For orders placed during the transition period, BC Racing encouraged users to contact sales or wholesale teams for assistance. Orders placed through the new system will not be processed until March 1, 2023, when the new system is officially live.
Users can reach BC Racing’s sales department via phone at 321-206-6381 or by email at [email protected] for assistance with ordering, custom builds, or vehicle-specific questions. This direct line of communication ensures that users receive accurate information and support tailored to their specific vehicle and needs.
Conclusion
BC Racing coilovers are designed to offer a blend of performance, adjustability, and reliability for a wide range of vehicles. While the installation process can be complex and may require professional assistance for certain models, the company provides detailed instructions and support for users seeking to install the kits themselves. The availability of customization options—ranging from extreme low kits to fully custom spring and damper valving—ensures that users can tailor their suspension to their specific driving needs and preferences.
Post-installation considerations, including alignment and corner balancing, are essential for maximizing the benefits of the coilover system and ensuring long-term performance and safety. Users are encouraged to contact BC Racing directly for vehicle-specific guidance, particularly when selecting or customizing a coilover kit. By following these guidelines and utilizing the available resources, users can achieve a suspension setup that meets both their functional and performance requirements.