Need of Harmonic Damper:
The need for a damper will rely on the age of the engine design, its manufacture, strength of components, usable powerband, rev range, and, most significantly, the standard of the engine’s tune. The engine’s tune especially in computer-controlled applications can have a dramatic effect on durability, the aggressiveness of the tune puts the engine in danger of detonation which may be catastrophic to all or any rotating assembly components.
Modern (roughly 1988+) DOHC, SOHC flat 4, I4, flat 6, I6, V6, flat 8, and flat-plane V8 don’t need this device. With or without the presence of a damper, a crankshaft will act as a torsional spring to some extent. Impulses applied to the crankshaft by the connecting rods will “wind” this spring, which can respond (as a spring-mass system) by unwinding and re-winding in the wrong way. This crankshaft winding will usually be damped out naturally.
However, at certain crankshaft rotational speeds, such winding can overlap with the crankshaft’s natural resonant frequency, thereby increasing the frequency’s amplitude and possibly resulting in crankshaft damage. Read and learn about car Technical FAQ and get in-depth details of the car features.
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