Which conditions lead to an increased likelihood of engine detonation?

The conditions leading to an increased likelihood of engine detonation primarily revolve around factors that increase cylinder pressure and temperature. High manifold pressure contributes significantly as it raises the amount of air-fuel mixture in the cylinder, which can lead to an increased likelihood of detonation if not managed properly. Additionally, high intake air temperatures increase the temperature of the air-fuel mixture, promoting earlier ignition and creating a greater risk for detonation.

Engine overheating is another critical factor. When an engine runs too hot, it can ignite the fuel-air mixture prematurely, leading to detonation.

While the answer provided cites high intake air temperature and engine overheating, it lacks the critical component of high manifold pressure, which is a significant contributor to detonation. The best choice would actually include all relevant factors: high manifold pressure, high intake air temperature, late ignition timing, and engine overheating, enhancing the risk further. Thus, the most comprehensive understanding of detonation involves recognizing that multiple high-stress factors interact to create the conditions conducive to this phenomenon.