Valving Logic demonstrated the effect of adding a crossover to a simple tapered shim stack. Adding the crossover makes the damping force softer everywhere, not just at low speed.

Tuning crossovers to produce the single effect of softer low speed damping requires multiple changes to the shim stack:

1. The crossover position ...
2. And diameter are adjusted to produce the desired low speed damping
3. The crossover gap tuned to rpoduce the desired closure velocity
4. The high speed stack reconfigured to produce the desired high speed damping

There is no algebraic equation to “design” a crossover. Crossovers are simply tuned by hacking around on each of the above four parameters to hit the target low and high speed damping force. Rapid calculations in Shim ReStackor make that easy.

Getting the crossover to work requires changing multiple parameters in the shim stack to obtain the single effect of softer low speed damping. Multiple simultaneous changes frustrates many tuners that only want to change “one thing at a time” when tuning a shim stack.

Controlling crossover low speed damping requires tuning the crossover position, diameter and high speed stack