Different Engine Design Attributes

[FYRHWK1]

Originally Posted by ivymike1031

Um, guys, I hate to keep beating the same horse over and over again, but this one just won't seem to die. A "harmonic balancer" is correctly called a torsional vibration damper, and it is used to damp torsional vibrations of the crankshaft. These vibrations have little (nothing that I can think of) to do with rotational imbalance, and everything to do with the firing pressure of the cylinders, the firing order, the dimensions of the crank, and the mass of the slider assys. I'd go so far as to say that rotational imbalance is never considered at any point in the selection of a tv damper.

Haven't we gone over this a few dozen times before?

I guess it came out wrong, but that's why I passed off the harmonic balancer as unimportant, because I knew someone would bring it up as a "bandage" for an unbalanced motor, though it has nothing to do with any of the rotating assembly forces.