Counterbalanced Crank with a harmonic balancer
 

There is another thread on the harmonic balancer from New Zealand. I do not want to hijack that thread so I started this one.


I have 2 engines that have counterbalanced cranks and they do not seem to have definite vibration ranges like some of the other posts indicated. I cannot think this through to see where the harmonic balancer would help. Anyone have any thoughts?


Vic

Re: Counterbalanced Crank with a harmonic balancer
 

Torsional vibration is reduced with a counterbalanced crankshaft but not eliminated..why not run the balancer

Re: Counterbalanced Crank with a harmonic balancer
 

What other modifications did you do that could affect crank harmonics?
Lightened flywheel?

Re: Counterbalanced Crank with a harmonic balancer
 

2 extra main bearings?

Re: Counterbalanced Crank with a harmonic balancer
 

You do not feel torsional vibration. The advantage of a front damper will normally only be noticed by longer bearing life.

Re: Counterbalanced Crank with a harmonic balancer
 

Pete is right!

Re: Counterbalanced Crank with a harmonic balancer
 

You can hear torsional vibration with metal timing gears which shake together as you pass through the harmonic rev ranges.
SAJ in NZ