The BC Racing DS Series represents a track-oriented coilover system designed for drivers seeking enhanced suspension performance beyond standard street setups. Built around a digressive piston design, this system addresses the demands of spirited driving whilst maintaining usability for daily applications. Choosing the BC racing DS series for your vehicle delivers increased low-speed damping force through proprietary digressive valving, offering improved control over body movements such as roll, pitch, and dive without sacrificing the linear response needed at higher velocities.
This suspension system combines extensive adjustability with practical features including 30-click compression and rebound settings, customisable spring rates, and mono-tube shock construction. Further technical specifications and purchasing options are available through retailers such as Springrates, where drivers can explore configurations tailored to their specific requirements. Whether you are prepping for a weekend at the circuit or refining a high-performance street build, these coilovers provide a versatile foundation for chassis tuning.
1) Digressive piston design for enhanced low-speed damping
The BC Racing DS Series employs a proprietary digressive piston design that fundamentally changes how the dampers respond to different shaft speeds. This design increases the damping force at low piston velocities whilst maintaining a more linear feel at higher velocities.
As a specialist suspension retailer, Springrates offers the BC Racing DS Series coilovers with custom valving options to ensure the digressive curve perfectly matches your vehicle’s weight and intended use.
At low shaft speeds, the enhanced damping force helps control body roll, pitch, and dive during cornering, acceleration, and braking. When encountering kerbs or road imperfections at speed, the reduced high-speed damping allows the wheel to travel more freely, preventing harsh impacts from transmitting directly into the chassis. This offers drivers a distinct feel through improved chassis control during typical driving manoeuvres whilst maintaining compliance over bumps.
2) 30-click compression and rebound adjustment
The DS Series features a 30-click damping adjustment system that controls both compression and rebound forces simultaneously through a single adjuster. This unified approach simplifies the tuning process whilst maintaining precise control over suspension behaviour.
The adjustment mechanism allows drivers to fine-tune their suspension setup across 30 distinct settings. Each click represents a measurable change in damping force. Drivers can adjust front and rear damping independently to modify handling characteristics; softer settings generally improve comfort on uneven surfaces, whilst firmer settings reduce body roll during spirited driving.
3) Mono-tube shock construction for consistent performance
The BC Racing DS Series utilises mono-tube shock construction as a core design element. This single-tube configuration houses the piston, shock oil, and nitrogen gas within one cylinder, allowing for more efficient heat dissipation during extended driving sessions.
Heat management is crucial for maintaining consistent damping characteristics. The larger piston surface area in mono-tube shocks provides more precise control, which translates to more predictable handling across varying temperatures. BC Racing finishes the DS Series shock bodies in satin chrome to ensure durability alongside performance.
4) Highly customisable spring rates and top mounts
The DS Series stands out for its extensive customisation options. BC Racing offers custom spring rates tailored to specific driving conditions or vehicle modifications. While standard rates work well for most, custom rates are often necessary for aggressive wheel fitments or heavy track use.
Swift Spring upgrades are also available as an alternative to standard springs. These competition linear-rate springs offer enhanced performance for both street and track. Front camber plates come standard on applicable kits, allowing for precise geometry adjustments to maximise the tyre contact patch.
5) Ideal for track-biased and high-performance street use
The DS Series suits drivers who prioritise responsive handling without sacrificing daily usability. Track enthusiasts benefit from the system’s ability to handle high-speed compression events effectively. The dampers respond quickly to sudden load changes, maintaining chassis stability through rapid direction changes.
The 30-level adjustability allows for precise tuning for different circuit conditions. Drivers can dial in stiffer settings for track days and soften the setup for the drive home. The monotube design further aids this by preventing damping fade when the suspension works continuously at high temperatures.
6) Rebuildable for extended durability and maintenance
BC Racing DS Series coilovers feature a fully rebuildable design that extends their operational lifespan. Components such as seals, pistons, and damping shims can be serviced or replaced individually, which reduces long-term ownership costs compared to sealed units.
Regular maintenance intervals can be established based on usage patterns. Track-focused drivers may require more frequent servicing than those using the coilovers primarily on the street. BC Racing provides replacement parts through its extensive distribution network, supporting the long-term viability of the investment.
7) Balanced comfort and control for daily driving
The DS Series addresses the common challenge of sacrificing comfort for handling. The digressive valving system operates differently at various piston speeds; at lower speeds, the damping force increases to control body movements, while at higher velocities, the dampers filter out road irregularities.
This characteristic allows the suspension to absorb bumps whilst preserving a responsive feel. Street-oriented settings provide compliance over speed bumps, while track-biased configurations deliver the sharp responses expected of a high-performance vehicle.
8) Linear damper feel ensures smooth cornering
The DS Series maintains a linear damper feel at higher piston velocities, which is essential during high-speed cornering. The design ensures that even as the digressive piston works to control low-speed roll, the feedback remains predictable as speeds increase.
During corner entry and exit, the dampers respond progressively to weight transfer. This balanced damping characteristic helps the chassis settle quickly between transitions, reducing unwanted body movement without creating an unpredictable response.
9) Affordable yet advanced suspension technology
The BC Racing DS Series delivers professional-grade digressive piston technology at a competitive price point. Previously, this level of engineering was found primarily in high-end racing suspension systems costing significantly more.
By making this technology available to a broader market, BC Racing allows enthusiasts to access measurable improvements in handling dynamics without a professional racing budget. The value proposition centres on proven technology and the economies of scale afforded by BC Racing’s massive manufacturing capacity.
10) Suitable for various car models, including AWD vehicles
BC Racing DS Series coilovers are available for over one thousand vehicle applications. The catalogue covers everything from the Nissan 350Z and BMW M3 to modern all-wheel-drive platforms like the Subaru WRX STI and Tesla Model S.
AWD vehicles receive the same attention to engineering as rear-wheel-drive platforms. The digressive piston design works effectively across different drivetrain configurations, ensuring that regardless of what you drive, you can achieve a perfectly balanced suspension setup.
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