Скачать или смотреть Prime Cuts We Cut Open a Multimatic Spool Valve Damper to Reveal Its Secrets

Windows: There are six ports, or windows (002), on each street-car valve. Racing applications get fewer. The shape of the port helps define the damper’s baseline force-velocity curve—how much damping force is generated based on the vertical speed of wheel movements. The narrow end of each opening establishes the low-speed damping. Multimatic has eight window shapes in production, but the possibilities are nearly infinite. The window shape is one of the first things locked in the tuning process. When cutting the ports into the spool valves, Multimatic leaves the edges rough. The resulting turbulent flow smooths out the damper’s action. Shuttle: The shuttle (003) is the metaphorical shutter that opens and closes the window to fluid flow. It looks like a piston with holes in its crown and is supported by a spring that compresses under the force of vertical wheel movement. The faster the movement, the more the window opens to let the damper’s fluid pass through the valve. It is both passive and elegant. The initial position of the shuttle rel