KW Clubsport 3-Way Coilover - BMW M3 ( E90

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.

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. The rebound 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