Application: 2015-2017 Subaru Impreza STi
Front Lowering: 0.6″ to 1.4″
Rear Lowering: 0.2″ to 1.4″
- Front and rear height adjustable by threaded shock bodies
KW clubsport – Coilovers for race track and road
KW Clubsport coilovers was developed for customers, who demand a better handling car when participating in track day events, but also require a setup that could be used every day. The Clubsport was specifically designed for the Nordschleife using track day tires. By using the optional adjustable top mounts, the suspension geometry can be adjusted to the requirements of tires and the intended use. The mentioned adjustment options combined with the independently adjustable rebound and compression damping technology allow a suspension setup according to the vehicle load, tire characteristics and different track conditions. KW Clubsport meets every demand regarding a coilover for the usage on the road and the race track.
KW Clubsport suspension kits are independently adjustable in compression and rebound forces and include high performance racing springs. Racing top mounts are optionally available for further performance. KW Clubsport guarantees excellent handling, best performance, highest agility and fantastic lap times.
- Height adjustable coilovers
- Performance setup for the racetrack
- Dampers in compression & rebound forces independently adjustable
- Use of high performance linear race springs/li>
- In stainless steel technology inox-line
- Additional available with racing top mounts
- TÜV approval possible depending on the specification
Compression- and rebound adjustment
As far it is vehicle-specifically possible, the rebound damping is adjusted by a spindle at the end of the piston rod. Mainly, the traction phase (rebound) controls car body vibrations and also influences handling and comfort in the low-speed damping range. By using the traction phase adjustment, the vehicle can be adapted to the requirements of the driver. Moreover the driving behavior can be regulated from comfortably rolling to sporty and tense with improved road holding characteristics.
The compression phase adjustment is carried out at the lower end of the shock absorber via our patented multi-purpose valve. The large number of pre-set parameters of this valve allows for a wide range of adjustment for individual use. The unique low-speed compression adjustment significantly distinguishes this technology from any other. In this compression range, the driving behavior of the vehicle is drastically influenced. An increase of the damping power supports the vehicle already during compression and therefore avoids rolling and pitching. The directional stability is significantly improved.
KW Clubsport 3-way adjustable damping
A “racing valve technology” like Manthey’s 24 hour race Porsche winner for road use – that was the task for the KW engineers. The outcome was a KW coilover suspension which also fulfils the high demands of the race track and includes a TÜV report for road use.
Nothing was left to chance with tuning and, like the 24 hour race victor, Manthey Racing, the in-house seven post test rig was used for its development. Matching the road-approved Dunlop Direzza sports tyres, the damper and spring rates of the new 3-way KW Clubsport suspension were perfectly adapted to the Nürburgring Nordschleife.
In addition, camber adjustable spherical bearing top mounts are pre-assembled, enabling optimal setups in combination with the adjustable KW Clubsport dampers for other sport tyres and race tracks.
Maintenance-free components, a sophisticated dust protection system especially for strut housings and the combination of the KW inox-line stainless steel strut housing with McPherson axles and aluminium housings where possible guarantee that all parts are tested and approved according to the standards of the car industry for all year road use.
Adjustment – 3 way adjustable
Rebound and compression
For the new 3-way KW Clubsport coilover suspension, KW has designed special racing dampers with expansion reservoirs. Thanks to the precise adjustment settings, the compression force in the high and low speed range can be easily adjusted independently of one another on the patented two way valve, which is installed in the separate reservoir. The low speed compression damping can be finely adjusted within seven positions and the high speed compression damping offers an adjustment range of 14 clicks.
Driveability can be significantly influenced by the compression adjustment. For example, a harder low speed setting causes directer steering behaviour on the front axle and can counteract the oversteer on the rear axle without negatively effecting the deflection behaviour of the high speed damping range, for instance, when encountering curbs and bumps.
The adjustable rebound valve in the working piston can be reached by an ergonomically shaped rebound adjustment dial which can be comfortably operated from the engine compartment. Therebound force can be finely trimmed for optimal use with 18 clicks. Using little power it offers more comfort, for example, for driving to the race track where it can be increased without effort to improve handling and steering precision, in particular at high velocities.
Aluminium unibal top mount
Adjustable top mounts are made from high grade aluminum and are included in the application when a technical advantage can be achieved. A special gasket system prevents the intrusion of dirt and moisture into the free-from-play pre-stressed uniball-bearings and therefore prevents corrosion and wear.
- Scaled camber adjustment (optionally also caster)
- Sealed, pre-stressed uniball-bearing in stress direction
- Made of tool steel (100Cr6); 58 to 64 HRC – hard chrome plated,
PTFE lubricant, stainless steel outer ring (X200Cr13)
- Axial bearing as balance on McPherson struts
High-performance racing springs
The new KW high-performance springs are produced from specially alloyed and tempered spring steel, and the increased resilience of the material enables new spring designs with reduced spring thickness. This makes the springs up to 30% more efficient than conventional racing springs. With the same overall length this means:
- more suspension travel
- higher block loading
- lower weight
Further weight reduction can be achieved by shortening the overall length of the springs and adjusting the necessary block loading.
- shorter overall spring length
- improved freedom of wheel movement
- further weight reduction