PRESSURE C     [ca force + press]     P.c - P.ca = ca force
  • P.c is the pressure variable in the ca force. 
  • P.c is determined by the stiffness of the ca stack. 
  • A stiffer ca stack will produce HIGHER P.c, resulting in a greater pressure drop and higher ca force.
  • P.ca is dependant on the nitrogen charge, and does not fluctuate with valving changes, but will increase slightly as the temperature increases during the dyno run.
    • The press increases due to both gas expansion and thermal expansion of the oil.
  • Consider P.c as the primary pressure which can be regulated with the ca shim stack, and P.ca as secondary.
  • 'ca force' comes from  P.c - P.ca.