rbahr

Call Angelo Zarra,

Been through this a bit with my car and Angelo helped me - that focus was actually bump stops. Although the canister pressure CAN look like increased spring rate, it has a number of unwanted side affects, stiction and hysteresis, but I am not smart enough to understand all of the interactions...

Ray

OlsenMotorsports

For it to act like spring rate you gotta really be in the upward range of pressure. Say above 225-300. That will cause lifting forces of the nitrogen trying to compress back against the fluid putting pressure on the divider piston. It will make the damper more supportive, crisp, and reactive by reducing cavitation. This is good for say sebring where you have huge bumps and compression and damper velocities are 10-20" a second.

Stiction is where it is at. I personally use can pressure to tune on the tire sidewall using stiction manipulation. A michelin you can really beat on with pressure (250 and above), but a conti or a hoosier you will get a lot of flat slides in high speed high load situations when the sidewall folds over, so i run aggressive front pressure (150+) and sometimes as low as 80psi rear depending on what the tire is doing. Running low pressure reduces damper longevity as the x-rings rely on pressure to seal, but it works.

I could write a book on this and cant cover it here. But my phone is always on. You guys know that.

-T.O.

OlsenMotorsports

on an RS-Pro its digressive because it is only double adjustable. so it is pretty flat depending on what valving you have. (i am assuming factory)

probably 10-15lbs below click 7 and 25lbs above click 7 as the bellville pre-load gets pretty aggressive.