What is the result of a higher manifold pressure in relation to engine performance?

Higher manifold pressure in a reciprocating engine generally leads to an increase in engine performance, specifically in terms of power output. When manifold pressure is elevated, it indicates that a greater amount of air (and therefore fuel) is being forced into the engine cylinders during intake. This enhanced charge can improve the engine's volumetric efficiency, allowing it to produce more power.

In relation to bearing loading, while increased manifold pressure can lead to greater performance, it also places additional stress on the engine components, including the crankshaft bearings. This is due to the higher forces being transmitted through the engine as a result of increased power output. Depending on the design of the engine and how well it is engineered to handle these stresses, the increased loading on bearings can potentially affect their longevity and the overall durability of the engine.

Other choices may reflect considerations but don’t directly relate to the core concept of how manifold pressure affects performance in terms of increased power and bearing load. For instance, while increased fuel consumption may occur with increased manifold pressure, it isn’t a direct result but rather a consequence of delivering more air and fuel into the engine to boost performance. Similarly, reduced horsepower and lower oil temperature are not associated with higher manifold pressure, as they would typically counteract the intended