For automotive enthusiasts seeking to enhance their vehicle’s performance and appearance, coilover suspension systems are a popular and effective upgrade. BC Racing, a well-regarded brand in the automotive tuning industry, offers coilover kits designed for a balance of street usability and track capability. These kits provide adjustability in ride height, damping, and spring rates, allowing users to tailor their suspension to specific driving needs.
This article provides a detailed overview of BC Racing coilover installation procedures, customization options, and technical considerations based on information from user forums and manufacturer guidelines. It is intended for U.S. consumers and DIY enthusiasts who are either planning or currently in the process of installing BC Racing coilovers.
Understanding BC Racing Coilover Kits
BC Racing coilover kits are engineered to provide a moderate drop from stock ride height while maintaining a comfortable and responsive driving experience. Out of the box, these kits are pre-adjusted to offer a balanced compromise between ride quality and handling. According to the documentation, standard kits provide approximately 1 inch of drop at max high setting and 2.5 to 3 inches at max low. Extreme low kits, on the other hand, offer an additional inch of drop and may include stiffer spring rates depending on the model.
The kits are also adjustable for damping and spring rates, allowing users to fine-tune the suspension to their preferences or driving conditions. It is important to note that while minor spring rate adjustments (within ±2kg) can be made without modifying the damper valving, larger adjustments require a damper valving change to ensure optimal performance and safety.
Installation Considerations and Procedures
The installation of BC Racing coilovers can vary depending on the vehicle model and suspension design. Some installations are straightforward and suitable for experienced DIYers, while others may require professional assistance due to the complexity of the suspension setup.
One notable consideration is whether the vehicle has on-center or off-center top plates. BC Racing offers coilover kits for both configurations and also provides camber/caster plates for vehicles that require them. Users are advised to verify their vehicle’s suspension geometry before purchasing a kit to avoid compatibility issues.
Additionally, certain vehicle models—such as the E30, Q45, and older Z-series models—require welding of the lower mount to the knuckle. While BC Racing includes installation instructions for these models, the welding process should be performed by a qualified professional to ensure structural integrity and safety.
For general installation, users have shared video guides and written instructions that detail the process of replacing stock suspension components with BC Racing coilovers. These guides typically cover the removal of stock struts, installation of the new coilovers, and adjustment of ride height and damping settings. A separate adjustment process may be required for fine-tuning the suspension to the user’s specifications.
Customization and Tuning Options
One of the key advantages of BC Racing coilovers is their high degree of customization. Users can adjust both the spring rates and damping characteristics to suit their driving style, whether it be for daily commuting, spirited weekend driving, or competitive track use.
Standard kits are tuned for a balance between street and track performance, but for vehicles intended for heavy track use, BC Racing offers the option to customize the spring rates and damper valving. This process ensures that the suspension remains stable and responsive under the higher loads and cornering forces experienced on the track.
For those seeking an even greater drop, BC Racing provides an "extreme low" option, which can be added to a standard coilover order through their online store or an authorized reseller. These kits use shorter springs and/or dampers, and the exact configuration depends on the vehicle’s suspension geometry and load requirements.
It is important to emphasize that extreme low kits should only be used in specific circumstances, such as on track-prepped vehicles or vehicles with modified weight distribution due to large tires or other performance modifications. Incorrect use of extreme low settings can lead to clearance issues, reduced ride quality, and potential damage to suspension components.
Corner Balancing and Advanced Tuning
Corner balancing is a technique used to optimize the weight distribution of a vehicle’s suspension, ensuring that each corner of the car behaves consistently during dynamic driving. This process can enhance handling and tire wear, particularly for high-performance or track-focused vehicles.
While corner balancing is not necessary for most street-driven vehicles, it is recommended for drivers who plan on extensively track testing their vehicle or for those who have installed coilovers on a modified or race-prepped car. BC Racing coilovers are well-suited for corner balancing due to their adjustability and precision tuning capabilities.
Users who are interested in corner balancing should consult with a professional tuner or use a dedicated corner balancing tool to measure and adjust the suspension settings. This process typically involves adjusting the spring pre-load on each corner of the vehicle to achieve a balanced weight distribution.
Ordering and Lead Times
BC Racing coilover kits are generally available for same-day shipping when in stock, with lead times of 2 to 3 weeks for out-of-stock items. The company is transitioning to a new ordering system as of March 2023, and users are encouraged to place orders before February 24, 2023, to access the previous system’s order history.
When placing an order, users should ensure they provide accurate vehicle specifications, including the chassis code, to ensure compatibility with the coilover kit. BC Racing’s sales department can assist with any questions regarding vehicle compatibility or customization options.
Safety and Professional Installation
While BC Racing provides installation instructions for many of its coilover kits, certain models require professional installation due to the complexity of the suspension setup. This is particularly true for vehicles that require welding of suspension components or those with non-standard suspension geometries.
Users who are not confident in their ability to perform the installation themselves are strongly encouraged to seek professional assistance. Improper installation can lead to safety issues, reduced performance, and potential damage to the vehicle or suspension components.
Conclusion
BC Racing coilovers offer a high degree of adjustability, performance, and customization, making them a popular choice among automotive enthusiasts. Whether used for daily driving, weekend track days, or full track preparation, these coilover kits provide a versatile and reliable suspension solution.
Installation procedures can vary depending on the vehicle model, and users are advised to review the manufacturer’s documentation and seek professional assistance if necessary. Customization options, including spring rate and damping adjustments, allow users to tailor the suspension to their specific needs, while extreme low kits offer additional drop for more aggressive setups.
For those looking to enhance their vehicle’s handling and aesthetics, BC Racing coilovers represent a high-quality investment that can significantly improve the driving experience.