<VV> Re: [FC] [VV] Harmonic balancers....

[James Davis]

As the resonance frequency of the crankshaft changes, so should the 
harmonic damper.  Following that analogy, the main change in 
crankshafts that cause a change frequency are: type of material, 
material structure, throw length, and mass; so crankshaft having the 
same qualities should be able to use the same harmonic 
damper.  Remember the damper's outer ring is tuned to oscillate in 
opposition to the crank rotation at one and only one frequency.   The 
mass of the outer ring and the elasticity of the bonding material are 
critical in determining that frequency.  Lon mentioned hp (torque) in 
the damper equation. The amount of torque does not change the 
frequency but more torque does increase the rotational vibration's 
peak number. It this case one size does not fit all.
Jim Davis




At 03:01 PM 6/30/2007, Merv Krull wrote:
>So the answer to my original question is, "Yes, a harmonic balancer 
>(damper) is good for 164 ci engines: not necessary, but would not hurt a 145"
>Which leads to another question that I reworded from Rick... "Does 
>one size harmonic balancer fit all, or are they different for 95s, 
>98s, 102s, 110s, 140s, and turbos?"
>toodles
>Merv KRull
>Salmon Arm, BC