The KW damping and valve technology, 3-way

We offer optimally adjusted damping technology for each vehicle class and almost every application.




Damper Basics – The function of a shock absorber

A shock absorbers job is to subside vibrations caused by the wheels, axles, and body. So the technically correct name for it would be a vibration damper. When driving over irregularities, the created shock or vibrations are absorbed by the suspension.

The spring wants to absorb and release stored energy. In a short sequence of these repetitive processes, a vibration arises. These movements are transmitted via the piston rod to the shock absorber. Here the kinetic energy is converted to heat by hydraulic resistance in the shock absorber valve and reduces the vibrations to an inaudible minimum.




  • Rocking of the body at successive irregularities
  • Gasp or strong immersion during acceleration or braking
  • Jumping wheels
  • Swerving when braking
  • Spinning in corners with a lacking tracking



The shock absorbers used in cars are usually twin-tube dampers or mono-tube dampers. A piston moves in an oil-filled cylinder in both damper types. The piston forces the oil through valves, which creates resistance to the oil flow with the help of various holes and orifices.

During rebound, the oil flows from the outer tube back into the inner tube. In addition to the channels in the bottom valve, the oil also has to flow through the rebound valve located at the piston rod, to get into the piston housing.




The functioning of a KW twin-tube shock absorber







The damper of a suspension kit converts the kinetic energy of the suspension spring into heat energy and passes it into the environment. When driving around a left hand corner or curve, the KW coilover kit works in the rebound phase on the left side of the vehicle and in the compression phase on the right side of the vehicle. The roles are reversed for right hand corners or curves, the right side of vehicle handles the rebound phase as the left side works in the compression phase.




Rebound adjustment

Independent adjustable rebound damping






Rebound adjustment by an allen key



Rebound adjustment by plugged on adjustment wheel at enough space



Rebound adjustment by fix integrated
adjustment wheel







16 Clicks – Best perfomance and easy adjustment

The vehicle specific KW damper settings, which are world renowned and priased by car enthusiasts worldwide, can be further adjusted with the KW Variant 2 or Variant 3 “inox-line” coilovers, Clubsport & 3-Way Clubsport coilovers and KW Street Comfort series with 16 precise clicks.

With the rebound adjustment you can modify the driving dynamics to match modifications such as the change of the complete wheel & tire sets or instalation of winter tires. Depending on your demand, the damping characteristics of the weather-resistant KW Variant 2 “inox-line” coilovers can be adjusted tighter or more comfortable. The suspension kit is suitable for all sporty drivers who want to get more driving pleasure than just a continuous lowering.




Technical details of adjustable rebound damping




Oil flow during “hard” rebound stroke



Bypass orifice with closed adjuster position. Digressive damping characteristic and the maximum achievable rebound damping. Damping is determined by the specific preload setup of the valve spring at the piston.

The result:
A firm but not a hard rebound stroke adjustment avoids rolling- and pitching motions.

Oil flow during “soft” rebound stroke



Bypass orifice with open adjuster position allowing for a progressive damping characteristic and ability to achieve minimum possible rebound damping .The bypass oil volume (black arrows) is not available anymore for the spring preloaded valve at the piston and the damping.

The result:
A lower rebound damping increases the driving comfort.



Graphic representation of the relation from damper speed (m/s) to damping force (N) when adjusting the rebound damping.




Compression adjustment

High-speed and low-speed range






Separate and independent damping force adjustment for rebound and compression damping in low-speed and high-speed



Individual damping force adjustment with color anodized adjustment wheels – with significantly noticeable clicks



Basic setup from factory with adjustment range in + / – direction









Graphic representation of the relation from damper speed (m/s) to damping force (N) when adjusting the compression damping in low-speed range.



 


Graphic representation of the relation from damper speed (m/s) to damping force (N) when adjusting the compression damping in high-speed range.






Compression adjustment with 6 clicks in low-speed
and 14 precise clicks in high-speed range

To make sure you are only at the front on the Nordschleife, the KW Clubsport 3-way coilovers were developed from feeedback from our appreciated and world wide “track-performance-oriented” drivers who used KW Clubsport 2-way coilovers.




Racing technology for everyone

The vehicle specific basic setup of the KW Clubsport 3-way coilover kit was developed through numerous tests and runs on the Nordschleife, and the KW 7-post rig can be further adjusted with the click adjustment for your wheel loads, vehicle weight, and change in body stiffness due to a bolted cage, welded safety cage, or strut bars. Similar to the in international motor sports used KW Competition racing suspensions, the KW Clubsport 3-way coilovers allow you to adjust the compression damping separately in low-speed and high-speed range.




Sport or even more sport – it is your decision

The click adjustment of the patented KW two-valve control occurs directly at the reservoir. At the purple adjustment wheel you can manually vary the vehicle specific low-speed compression damping from the basic setup determined by KW test engineers with six precise clicks. With the golden adjustment wheel, which is placed below, you can individually adjust the high-speed compression damping with 14 precise clicks from the recommended basic setup. The low-speed range of the compression damping affect at low piston rod speeds (max. 0,2 m/sec) the strength of the damping during compression. The high-speed compression damping affects all faster speeds of the damper piston rod.

While driving over curbs and after jumps, the piston rod immerses faster especially at different and uneven asphalt surfaces like found on the Nürburgring Nordschleife. As an active sports car driver, the KW Clubsport 3-way coilovers offer you the possibility to decide yourself, exactly at which low-speed compression adjustment the high-speed damping shall get active.




  • Separate and independent damping force adjustment for the rebound and compression in low-speed and high-speed
  • Basic setup from factory with adjustment range in +/- direction
  • Rebound damping: comfortable setting with 16 precise clicks
  • Low-speed compression damping: with 6 precise clicks
  • High-speed compression damping: with 14 precise clicks



KW piston rod guiding and sealing package




Our modular sealing system exceeds OEM standards. It can be opened easily and allows customized adjustments of the valve technology or rod / piston stroke by an aluminium nut.

  1. Nut is made up of high tensile aluminium
  2. Self-lubricated special NBR sealing
  3. Clamping sleeve
  4. O-ring made of temperature-resistant viton
  5. Guide bushing with bleed hole
  6. Special coated DU plain bearing
  7. Small increment rebound spacers