Can anyone explain how the harmonics effect the crank and why it shortens bearing life?
nevermind i found my answer
"Harmonic Balancer…Crankshaft Harmonic Damper…Torsional Vibration Damper….
The term so often used for this component is harmonic balancer, which suggests the unit “balances” the engine. In generality this statement is misleading…. a better description for this component is a harmonic damper or torsional vibration damper. This better describes the actual function of the unit.
Torsional vibration occurs in the crankshaft of engines, as a result of the combustion process. The sudden reversal of load on the piston, conrod and crankshaft during compression, followed by the ignition or firing of the compressed fuel and air in the combustion chamber. Subsequent relaxation of the load following combustion causes deflection or flexing of the crankshaft. This oscillating vibration which results from the reciprocating load changes will remain in force until dissipated by internal friction or damping. At certain rpm ranges these oscillations can come into phase with each other creating potentially damaging torsional peaks in the crankshaft.
Unless the amplitude of these torsional vibrations is controlled, major damage can occur to engine components, such as rapid wear of the timing sprockets, stretching or breakage of the timing chain, pitting or cupping of the camshaft and lifters, broken valve springs and valve train failure, reduced service life of crankshaft bearings. In extreme situations uncontrolled torsional vibrations can lead to a loose flywheel or a broken crankshaft with serious safety consequences."
found it on http://www.pro-race.com/faq.htm
nevermind i found my answer
"Harmonic Balancer…Crankshaft Harmonic Damper…Torsional Vibration Damper….
The term so often used for this component is harmonic balancer, which suggests the unit “balances” the engine. In generality this statement is misleading…. a better description for this component is a harmonic damper or torsional vibration damper. This better describes the actual function of the unit.
Torsional vibration occurs in the crankshaft of engines, as a result of the combustion process. The sudden reversal of load on the piston, conrod and crankshaft during compression, followed by the ignition or firing of the compressed fuel and air in the combustion chamber. Subsequent relaxation of the load following combustion causes deflection or flexing of the crankshaft. This oscillating vibration which results from the reciprocating load changes will remain in force until dissipated by internal friction or damping. At certain rpm ranges these oscillations can come into phase with each other creating potentially damaging torsional peaks in the crankshaft.
Unless the amplitude of these torsional vibrations is controlled, major damage can occur to engine components, such as rapid wear of the timing sprockets, stretching or breakage of the timing chain, pitting or cupping of the camshaft and lifters, broken valve springs and valve train failure, reduced service life of crankshaft bearings. In extreme situations uncontrolled torsional vibrations can lead to a loose flywheel or a broken crankshaft with serious safety consequences."
found it on http://www.pro-race.com/faq.htm
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