BR Series - coilover introduction

The BR series coilovers employ a 46mm piston within a 53mm damper body to optimize oil capacity.

During damper operation, the enclosed oil heats up, and its viscosity changes with temperature variations, potentially affecting the damping characteristics.

BC Racing not only utilizes high-quality oil in their coilovers but also takes an extra step to enhance performance. They construct their BR range with an ample 53mm damper body, increasing the unit's capacity, oil volume, and ultimately reducing peak temperatures, resulting in a substantial improvement in damper performance.

key features and adjustability

  • Key Features

    • Pillowball top mounts for enhanced responsiveness
    • Upper spring platform with integrated bearings for smoother operation
    • Camber-adjustable top mounts (model-dependent)
    • Independent ride height adjustment, separate from spring preload
    • 30-way adjustable damping for personalized tuning
    • Monotube damper design for improved performance
    • Tapered bottom mount locking collar to prevent collar from coming loose
    • Option for custom spring rates to suit your needs
    • Swift availability of spare parts with short lead times
    • Equipped with dust boots to safeguard damper seals
    • Backed by a 1-year manufacturer warranty

  • Corner weight adjustment

    The BC Racing coilovers feature an adjustable lower spring platform, enabling precise corner weighting for optimal balance and ensuring maximum tire efficiency.

    To achieve equal weight distribution on each tire of an axle, both front tires and both rear tires should bear equivalent loads. This ensures that both tires contribute equally during cornering, enhancing overall grip, maximizing cornering speed, and reducing lap times.

    For specific requirements, optional assistive springs can be acquired to fine-tune wheel droop within the unit.
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Ride height adjustment 

The ride height is controlled by the coilover's lower mount positioning. By adjusting this mount up and down the damper body, you can achieve a comprehensive range of customization.

Thanks to the adjustable lower mount determining the ride height, you maintain the complete damper travel, irrespective of the chosen ride height level.

Damping adjustment

BR coilovers are equipped with a user-friendly 30-way damping adjustment system, which combines both rebound and compression into a single adjuster, simplifying the tuning process to meet specific conditions.

Adjusting the damping for both the front and rear allows you to tailor the car's handling. For instance, increasing the damping force at the rear relative to the front can shift the vehicle toward an oversteer-oriented posture.

When it comes to drag racing in a rear-wheel-drive car, achieving optimal weight transfer to the rear tires is crucial for traction and preventing wheel spin. To do this, you would soften the rear dampers to enable faster compression. However, if the rear dampers are set to a firm setting, suitable for a racetrack, the car will be less inclined to squat, resulting in reduced traction.

Conversely, if you're pursuing drifting and face challenges with traction or understeer, stiffening the rear dampers while softening the front ones can enhance front traction and make the car's rear end looser. This adjustment shifts the vehicle's handling characteristics more toward drifting than drag racing, road driving, or track racing.

Pillowball (rose joint) upper mount

A noteworthy feature of many BC Racing BR coilovers is the inclusion of top mounts equipped with pillowball joints. These top mounts are meticulously crafted from high-quality aluminum alloy, subjected to an anodization process, and finally treated with bead blasting to achieve a robust, long-lasting finish.

The pillowball joints themselves are of Japanese origin and are characterized by their solid construction, effectively eradicating any flex or play commonly associated with conventional rubber mounts. This exceptional build quality not only ensures greater durability but also contributes to heightened responsiveness and improved handling performance, making it an excellent choice for enthusiasts seeking enhanced control and precision in their suspension system.

Camber adjustment

If your vehicle allows for camber adjustment, BC Racing coilovers come equipped with aluminum top mounts that are not only of high quality and Japanese-made but also feature adjustability. These adjustable top mounts provide the advantage of fine-tuning the camber settings to align with your specific requirements, whether you're driving on the road, hitting the track, or indulging in drift maneuvers.

Corrosion protection

The damper units are crafted from black chromed steel, ensuring exceptional durability, even in the harshest European winter conditions. Meanwhile, the aluminum parts such as top mounts and locking collars are anodized, and the steel lower mounts undergo an electrophoretic deposition process before being coated with a layer of powder.

To maintain the highest standards of quality and corrosion resistance, a monthly salt spray test is conducted on a random selection of steel components, including brackets, dampers, and screws. This rigorous testing procedure ensures that the protective processes are consistently effective, maintaining the utmost anti-corrosion performance.

High quality coil springs

BC Racing coilovers exclusively employ top-grade steel in the production of their springs. These springs are meticulously crafted from SAE9254 cold-wound steel, known for its remarkable strength and durability.

Before being released, the springs undergo a rigorous compression test, which subjects them to more than 500,000 cycles. Remarkably, this testing process results in less than 5% deformation, ensuring the highest level of performance and resilience.

Patented concave lower locking collar

BC Racing dampers feature an advanced shim stack design in combination with premium-quality oil, ensuring consistent control over the compression and rebound speed of the damper rod, even in the most demanding conditions.

When a vehicle traverses uneven terrain, the motion of the damper rod during compression and rebound heats the oil within. Inexpensive dampers often employ low-quality oil, which exhibits changes in viscosity as temperatures fluctuate. It's imperative to use high-quality oil that maintains consistent viscosity across a wide temperature range. As soon as the oil starts to deteriorate, its properties change, resulting in alterations in damping and, subsequently, shifts in the vehicle's handling characteristics.

BC Racing goes the extra mile to exclusively use top-notch oil, guaranteeing that damping rates remain consistent not only for immediate performance, such as during spirited drives on back roads or on the track but also for long-term durability. This approach prevents rapid oil degradation, significantly extending the operational life of the dampers.

High quality oil

BC Racing dampers employ an advanced shim stack configuration and top-grade oil to ensure a consistent control over the compression and rebound velocity of the damper rod, even when subjected to the most demanding conditions.

As a vehicle traverses rugged terrain, the reciprocal compression and rebound motion of the damper rod causes the oil to heat up. In contrast, low-quality dampers use inexpensive oil that exhibits varying characteristics with changes in temperature. Therefore, it is essential to utilize high-quality oil that can sustain a consistent viscosity across a broad temperature range. When the oil begins to degrade, its properties shift, resulting in alterations to the damping characteristics and, consequently, changes in the vehicle's handling traits.

BC Racing takes deliberate measures to utilize only premium-quality oil. This not only ensures that damping rates remain consistent during immediate applications, such as spirited drives on backroads or track sessions but also maximizes the long-term durability of the dampers. This approach prevents rapid oil degradation, significantly extending the operational lifespan of the dampers.

Nitrogen pressurised dampers

When you push a damper to its limits on the track or when driving at high speeds on rough roads, it can lead to the aeration of oil and the potential occurrence of cavitation. This results in the creation of foam within the oil, effectively diminishing its viscosity and, consequently, reducing the damping capacity of the unit. Using high-quality oil can help mitigate this issue to some extent, but BC Racing takes an extra step by pressurizing their dampers with nitrogen.

The nitrogen applies pressure to a floating piston, which, in turn, exerts a continuous force on the oil. This significant pressure reduction minimizes aeration and enhances the consistency and overall quality of the damping process. Additionally, the pressurized nitrogen contributes an extra component to the effective spring rate of the damper unit.

Bearing mounted upper spring platform

Minimizing friction between the spring and its seating is of utmost importance because the spring undergoes twisting during compression. Failing to alleviate this tension can result in spring binding, causing a slight alteration in the spring rate as it compresses and extends. The generated tension can lead to rapid wear of the spring perches and, in extreme cases, may cause the spring platform and locking collars to come loose. This, in turn, can lead to the platform and locking collars gradually moving down the damper, resulting in an uneven ride height and the risk of the spring dislocating during full damper extension.

Furthermore, the friction between the spring and seats also affects the steering effort, as the springs physically rotate with the wheels. This introduces unnecessary friction into the steering system, which, in turn, has a negative impact on the vehicle's handling characteristics.

BC Racing has introduced an innovative design with a bearing-mounted upper spring platform. By significantly reducing stiction between the spring and its seating, BC Racing units effectively mitigate the aforementioned issues, enhancing the steering system's efficiency and allowing the spring and damper to operate as intended.

Optional upgrades

Minimizing friction between the spring and its seating is of utmost importance because the spring undergoes twisting during compression. Failing to alleviate this tension can result in spring binding, causing a slight alteration in the spring rate as it compresses and extends. The generated tension can lead to rapid wear of the spring perches and, in extreme cases, may cause the spring platform and locking collars to come loose. This, in turn, can lead to the platform and locking collars gradually moving down the damper, resulting in an uneven ride height and the risk of the spring dislocating during full damper extension.

Furthermore, the friction between the spring and seats also affects the steering effort, as the springs physically rotate with the wheels. This introduces unnecessary friction into the steering system, which, in turn, has a negative impact on the vehicle's handling characteristics.

BC Racing has introduced an innovative design with a bearing-mounted upper spring platform. By significantly reducing stiction between the spring and its seating, BC Racing units effectively mitigate the aforementioned issues, enhancing the steering system's efficiency and allowing the spring and damper to operate as intended.