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Need help interpreting Shock Dyno charts

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Old Feb 20, 2005 | 11:17 PM
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Andrew 825SM's Avatar
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From: Tustin, CA, USA
Default Need help interpreting Shock Dyno charts

Would someone please explain to me how to read these charts? These are revalved koni yellow shocks. They don't seem like the typical dyno chart for shocks. Thanks.

Front


Rear
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Old Feb 21, 2005 | 03:37 AM
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.RJ's Avatar
.RJ
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From: RIP Craig Jones
Default Re: Need help interpreting Shock Dyno charts (Andrew 825SM)

https://honda-tech.com/zerothread?id=1104049
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Old Feb 21, 2005 | 03:42 AM
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From: Cogito ergo sum, Canada
Default Re: Need help interpreting Shock Dyno charts (Andrew 825SM)

Those charts are the raw data from the damper dyno. A dyno has a load cell to measure force in Newtons or lbs and a means to move the shaft, conceptually similar to a crank with an offset, and you measure shaft displacement as the crank turns. There are also other ways to move the shaft and then measure displacement. Hence those charts you have are Force vs Displacement. The more commonly shown charts are Force vs Velocity, and these are usually derived charts, which are obtained by knowing the rate of change of the damper shaft displacement. Conceptually for a crank type (scotch yoke) displacement, the velocity is always changing, and this depends on the amount of offset and the rotational speed of the crank, since this gives a displacement motion similar to a sine wave, same as a piston in an engine. I think you would have to get whoever measured those curves to give you the Force vs Displacement curves. If you had other charts similar to yours on the same dyno, you could compare them to each other. Otherwise you need the Force vs Velocity ones.

Have a look here:
http://www.shockdyno.com/faq.htm
http://www.roehrigengineering....o.htm

Koni rep CRX Lee has often said on here that they will tests some dampers for free if you pay shipping. That might be an idea for you to check it out.
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