TwinTurbo.NET: Nissan 300ZX forum - You need to look at it in the relative oreders of magnitude>
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Subject You need to look at it in the relative oreders of magnitude>
     
Posted by my91z on February 25, 2003 at 2:01 PM
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In Reply To I did. posted by Marshall on February 25, 2003 at 01:46 PM
     
Message The forces involved in the crank twist/torsional vibrations and their frequencies mean you damper has to have a much higher damping value. Think of the frequency of a car going over a bump. You are only talkig about a few cycles er second, a few Hertz, if that. The engine vibrations are orders of magnitude higher. You need a dapmer with a different characteristic than the thick fluid in a shock absorber.

We are saying the same thing here. The pulley absorbs the vibrational energy to damp the cranks vibrations. Just like a shock damps the cars up and down energy after a bump.

Mike

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