A BRIEF HISTORY AND DISCLAIMERS  
  • FIRST DISCLAIMER
    • I don't know what I'm talking about.
 
  • Both the fork and shocks can be dyno tested.  In this description we are referencing a shock.
  • -
  • There are two different types of dyno tests.  We refer to them as:
  • Dyno Test only:
    • The load cell records the compression and rebound force, displays a graph and spits out some force numbers.
  • Pressure Test:
    • Pressure sensors are added to the shock body, recording pressures in the three chambers.
      • P.c  is pressure in the compression chamber (comp).
      • P.r  is the pressure in the rebound chamber (reb).
      • P.ca  is pressure in the compression adjuster chamber (cadj).
      • P.gas  is pressure in the reservoir, which is the same as P.ca.  Therefore we only record P.ca
 
  • After doing hands-on suspension for years, we finally got a dyno in 2006 and started running tests and documenting the results.
    • We quickly learned that our hands-on experience was off.  The test results were not what we expected. 
    • We thought we changed high speed, it affected low speed. 
    • We thought we targeted low speed and it had major impact on high speed.
  • From 2006 - 2013 we ran Dyno Test only.
    • Therefore, any documentation from 2006-2013 is limited to our experience with dyno only tests.
  • From 2013 - present we run both Dyno Tests and Pressure Tests.
    • Documentation from 2013-on is more precise and includes pressure test experience.
  • Unfortunately, we learned that our hands-on dyno experience was lacking.  We were making incorrect assumptions because we didn't have a breakdown of forces.
  • Pressure testing breaks down the forces into:
    • comp force from the main piston
    • cadj force from the cadj piston
    • gas force from the nitrogen charge
    • drag force from the shaft seal, bushing and piston band.
 
  • SECOND DISCLAIMER