Vibration Damper

1376 Torsional Vibration Damper







The higher cylinder gas pressures in the 3.8 liter engine leads to torsional vibrations in the engine as a result of the transmissions of these forces via the pistons and the crankshaft drive (connecting rod and crankshaft). To reduce these torsional vibrations, the vibration damper material was changed from steel to aluminum. The previous 3.8 liter torsional vibration dampers were made from steel, which was a disadvantage since the heavy weight compromises revving ability and spontaneity. To reduce this disadvantage, the 3.8 liter engine of the 911 Carrera S incorporates a torsional vibration damper made of aluminium.

This reduces the crankshaft drive's mass moment of inertia and enhances the engine's revving ability and spontaneous response.