Another cool part about the DFV shocks is that the damping is temperature-sensitive. As a shock gets hotter, the fluid loses viscosity and thins out. On most shocks, this causes the shock to loose damping and fade. When cold, the fluid thickens. This can cause the shock to ride hard on cold days. The DFV shocks have a special feature to counter this. The shaft that goes to the needle valve is made out of a special alloy that expands and contracts in proportion to the fluid temperature. When the fluid is cold, the shaft gets shorter and allows for more fluid flow through the valve, keeping the ride from getting harsh. When the shock gets hot and the fluid gets thin, the shaft expands moving the needle valve lower reducing the flow and keeping the shock from fading.
The Ohlins DFV series of shocks, struts, and coilovers are surprisingly affordable and they are available for a wide range of cars. There are also universal kits available so you can adapt DFV suspension to your car with a minimum of complex fabrication. We look forward to testing this line in the near future!