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Harmonic Balancer & Drive Pulley Weight Is A Good Thing

The weight and density of the damper, even if it is just a crank pulley, is essential to the performance of protecting your engine against torsional vibration.  Back to the analogy of the punching bag in “How Does A Fluidampr Works.”  The torsional vibration energy created with every power stroke of your engine is repeatedly ‘punching’ the crankshaft damper.  When you hit a light weight punching bag it does not absorb much force.  In fact it swings away and right back at you.  Or in the instance of your crankshaft, sends the torsional vibration right back through the crankshaft to do damage.  When you hit a heavy weight punching bag it absorbs a lot of energy and doesn’t budge.  Inertia mass and stopping this destructive force is what a quality damper is designed to do.  For any damper to effectively prevent damage to your engine, it must have some weight behind it.  Just like a big heavy punching bag.

Our engineers design for superior torsional vibration control across the entire rpm range and optimal weight.  In a Fluidampr the inertia ring mass is free floating within the housing.  Once the crankshaft starts rotating centrifugal force and torsional vibration takes the weight of the internal interia ring off the crankshaft.  This does allow the engine to rev faster.  You’ll notice two weights listed in our catalogs, overall weight and rotating weight.  In engine building, rotating weight is the more important number to focus on.