2816 and 2817 series – Racing Strut Cartidge

Developed specifically for production-based race cars with strut suspensions, the 2816 and 2817 series share their internal components with the very successful 2812 racing damper.The 2816 is the universal tool for the professional OEM customer who wishes to (re)design a McPherson suspension from scratch. As a bare insert, it offers maximum freedom to the suspension designer. Available with either a pin or eye upper attachment and stroke ranging from 119 (4.685") to 199 (7.835") mm.

The 2817 is the cost-effective strut solution for the professional or club racer.  It is a semi-finished aluminium McPherson strut without brackets, containing a 2816 type insert. It also offers stroke ranges from 119 to 199 mm. Steel brackets can be welded onto the housing by the customer.

The 2816 and 2817 are modular systems, meaning all 2816 and 2817 shock cartridges share the same basic dimensions and features. The stroke lengths and valving characteristics will be custom-built to suit the specific application.

These series are specifically designed for competition purposes and offer full adjustability while fitted on the car. Their precision adjustment mechanisms allow maximum control over the damping forces generated, especially in the low speed damping range.

To achieve this, these series do not  rely on the commonly used needle valves. Instead, a superior and advanced adjustment cartridge controls the opening and closing of valve loaded ports. Positive lock detents assure that each port can only be either open or closed. The result is that the cartridge will always accurately reproduce a set of eight pre-programmed damping curves.

Various cartridges are available, each with its own set of characteristics. A pair of cartridges is housed in the main piston, one for bump, one for rebound. Together they can modify any given basic valving in 64 different ways. By having all forces generated by the piston assembly, the control of the damper over the suspension is instant and precise, decisive and smooth. A separate bulky reservoir is not needed and the installation can be kept simple, compact, lightweight and clean.

Drivers like the 28 series because they feel a real difference between adjustment steps. Mechanics and race engineers appreciate the user friendliness and apparent "simplicity" of the dampers that make them so easy to work with.