- This is how how a crank dyno works. [Scroll down for video]
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- Video showing a dyno run from 5 thru 50 ips (inch per second).
- Scroll down for additional video links.
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- Here are are two additional videos.
- This first video shows the dyno performing the seal drag and gas test.
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- 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]
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- 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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