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  • This is how how a crank dyno works.  [Scroll down for video]
     
 
 
  • Here are are two additional videos.
  • This first video shows the dyno performing the seal drag and gas test.

  • The seal drag is first.  This measures the amount of drag from the shaft seal and piston band. 
    • The shaft moves from 6 o'clock (BDC) up to 9 o'clock for the seal drag test.  At 9 o'clock the stroke becomes very slow and seal drag test is performed.
    • Then the shaft moves to 3 o'clock and repeats the process. 
      • The program calculates the 'seal drag' from these two readings.
  • Immediately after the seal drag test, the dyno performs a gas test.
    • The shaft moves into the 9 o'clock position, comes to a stop, pauses and then takes a reading on the load cell.
    • Then the shaft moves to 3 o'clock and repeats the process.  The program calculates the 'gas force' from these two readings.
      • The gas force is the force exerted on the shaft from the nitrogen charge.
    • After the gas test, the dyno performs 5 ips run.
  • FIRST VIDEO --->   [shock dyno test, seal drag and gas test]
 
  • This second video shows the dyno performing our standard dyno run that produces the compression and rebound force numbers.  We dyno test all shocks at the following velocities.
    • - - dyno test velocities = inch per second (ips) - -
    • 1 ips
    • 2 ips
    • 3 etc
    • 4
    • 5
    • 10
    • 20
    • 30
    • 40
    • 50
  • The dyno runs these 10 tests consecutively (one right after the other). 
    • The first test is 1 ips.  The second test is 2 ips. 
    • You can hear the difference in the motor as the speeds increase.
  • SECOND VIDEO --->  [shock dyno test, 1 thru 50 ips]
 
 
 
 
 
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  valving info
valving 001
valving 002
valving 003
valving 004
valving 005
 
  complex stacks
complex shim stacks
 
  more valving info
valving 101
valving 102
valving 103
valving 104
valving 105
valving 106
valving 107
valving 108
valving 109