Rennsport Systems is a distributor and a service center for Moton Suspension Components.

Rennsport Systems offers both Club Sport and Motorsport suspension upgrade packages for 964 - 993 - 993 Twin Turbo - 996 - 996 Twin Turbo - GT-3/GT-2 Porsche cars. 

A popular misconception is that horsepower makes for quicker lap times and this is singularly untrue. Quick lap times come from gains in corner exit and corner entry speeds. One of the biggest factors here is having a suspension that inspires the confidence for you to drive at speeds you are comfortable with. The real benefit of a Moton equipped car is that all of the components; springs, shocks, and bars work in harmony with each other controlling load transfer and dynamic weight distribution.

This is all about making cars easier to drive without frightening the driver and keeping the tires in contact with the road for maximum grip.

A Word about Moton

Moton Suspension Technology was founded in 1998 by Jerome Van Gool, one of the founders of JRZ, and is based in The Netherlands.

Most modern race cars rely on ground effects or downforce to generate higher cornering speeds, and the suspension uses very little travel to keep aero changes to a minimum. The unique design of the Moton damper uses a 22mm piston rod to provide maximum fluid displacement at small suspension travels, responding to the slightest movement of the suspension.

The greater fluid displacement caused by the cross section of the 22mm piston rod combined with gas pressure in the reservoir, results in an added lifting force on each corner of the car to support the main spring without increasing spring rates. The gas pressure can be varied between 6 bar and 20 bar giving the racer an extra adjustable medium. 

The 22mm piston rod compensates for less travel by increasing the diameter of the piston and thus, the displacement of fluid. Most damper manufacturers use a piston of 12mm or 14mm. Using a 22mm piston rod results in about a 300% greater fluid displacement making the damper more responsive at low damping velocities.

In other damper designs, the function of gas pressure is to keep the fluid compressed and prevent cavitation. In the Moton damper the gas pressure is used to give an added lifting force on each corner of the car. This lifting force offers a support to the main spring and helps carry the weight of the car so permitting softer main springs. The gas pressure can be varied between 6 bar and 20 bar. This becomes a very effective tool for pitch & squat control and stabilizing the whole platform of the car during cornering.

Remote Reservoir & Compression Adjustment

The Moton external reservoir contains the gas volume and fluid reserve. Located on the top is the adjustable blow-off valving system and non-return valve. The blow-off valve is designed to handle the large fluid displacement caused by the 22mm piston rod and responds to the slightest movements of the rod. The blow-off valve is spring loaded with Belleville washers and by turning the adjuster, preload is forced on the blow-off valve. Increasing the preload on this blow-of valve creates higher compression damping. This can be adjusted into 15 positions (Club Sports have 7). Using different sized Belleville washers varies the total adjustment range in compression.

Rebound Adjustment

The rebound adjuster is located on the top of the piston rod. Turning on the brass nut closes or opens precisely drilled orifices one-by-one below the piston. Closing off pre-measured orifices is a secure way of keeping the adjustments equal between dampers on the right & left side of the car. The rebound can be adjusted into 16 positions (Club Sport 7).

Rebound and Compression Double Valve Stack

The rebound & compression stack are non pre-loaded and built up in two phases. The primary stack consists of a main valve with a diameter of 34mm (rebound) and 36mm (compression), supported by valves decreasing in diameter according to the damper force requirements. This is the low velocity area of the damping. The secondary stack is separated from the primary stack by a small shim of 0.15mm thickness and 21mm diameter. The secondary stack limits the opening of the primary stack so by changing the composition of the valves, damping forces can be increased or decreased. The secondary stack is the mid and high speed area of the damping.

The new Club Sport line of dampers is for the serious club racer and high performance street/DE enthusiast. These dampers have the same technology & precise adjustment that the full-race shocks have. Club Sport dampers are double adjustable, remote reservoir shocks with 7 separate rebound and compression controls. This system will allow you to use a wide range of spring rates and eliminate the worry of having to revalve each time you wish to increase or decrease your spring rates.

Rennsport Systems assembles and offers each Moton suspension package with a custom dual-spring setup for each person's car and individual usage. Club Sport dampers are made for Porsche 993-996-964 cars, and BMW E-series.

 **** Race Shocks ****

These are 15-way, remote reservoir, double or triple adjustable dampers primarily used for competition cars. Combined with an appropriate spring package, there is not a high performing suspension for a race car. These are available for Porsche 993-996-964-GT-3-944, BMW E-series, and Chrysler Vipers.