Does cam timing effect RPM's

Yes, cam timing significantly affects engine RPMs. The timing of the camshaft determines when the intake and exhaust valves open and close in relation to the position of the piston, influencing the engine's breathing efficiency. Proper cam timing can optimize power delivery and torque across different RPM ranges, while incorrect timing can lead to poor performance, reduced RPM capability, and increased emissions. Thus, adjusting cam timing can enhance an engine's performance characteristics and responsiveness at various speeds.