Moving the cam gear to the retard setting shifts the torque curve toward higher RPMs.

Moving the cam gear to the retard setting shifts the torque curve toward higher RPMs.

• A. True
• B. False
• C. Not enough information
• D. Irrelevant

Answer: (A)

Cam timing directly shapes how the engine breathes at different speeds. When you retard the cam gear, the valves open and close a bit later in the cycle. That later timing tends to reduce the engine’s ability to fill the cylinders at low RPMs, which lowers low-end torque. At higher RPMs, the later timing doesn’t restrict breathing as much and can even help the engine keep making torque as the speed climbs, so the peak of the torque curve moves to a higher RPM. In short, delaying the cam timing generally shifts the torque peak toward higher RPMs, though the exact result depends on the engine design and cam profile.

Cam timing directly shapes how the engine breathes at different speeds. When you retard the cam gear, the valves open and close a bit later in the cycle. That later timing tends to reduce the engine’s ability to fill the cylinders at low RPMs, which lowers low-end torque. At higher RPMs, the later timing doesn’t restrict breathing as much and can even help the engine keep making torque as the speed climbs, so the peak of the torque curve moves to a higher RPM. In short, delaying the cam timing generally shifts the torque peak toward higher RPMs, though the exact result depends on the engine design and cam profile.