TwinTurbo.NET: Nissan 300ZX forum - yes...
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Subject yes...
     
Posted by LitlElvis on April 27, 2009 at 1:43 PM
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In Reply To any comment on the stock pulley not being a harmonic dampene (n/m) posted by ZiNnYc on April 27, 2009 at 11:00 AM
     
Message As far as I'm concerned, the stock crank pulley IS a harmonic damper, and this is because it has a large inertia ring mass that is not solidly attached to the crankshaft. Since this inertia ring is not solidly attached, it can accelerate and decelerate (limited by the elastomer between it an its hub) independent of the crankshaft which in theory will reduce the amplitude of harmonic vibrations.

     
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