Why is it important for a compensator cam to operate at a fixed engine RPM?

The importance of a compensator cam operating at a fixed engine RPM primarily revolves around maintaining consistent performance. When the compensator cam functions at a specific RPM, it ensures that the timing of engine events remains stable, leading to uniform performance characteristics throughout the engine's operation. This consistency helps in optimizing the timing of fuel injection, ignition, and other key engine processes, which ultimately results in smoother engine operation, improved power output, and reliable performance across various operating conditions.

In contrast, operating the compensator cam at variable RPMs could lead to fluctuations in engine performance, complicating the engine's tuning and potentially leading to inefficiencies or misfires. By having a fixed RPM for the cam, designers can ensure that the engine operates within its optimal performance envelope, enhancing overall efficiency and reliability.