What is manifold pressure?

Manifold pressure is a measurement of the air pressure inside the intake manifold of an internal combustion engine. It is typically measured in inches of mercury (inHg) or kilopascals (kPa).

Manifold pressure is an important parameter in engine performance as it affects the amount of air and fuel mixture that enters the engine cylinders. A higher manifold pressure indicates that more air is being drawn into the engine, which can result in increased power output.

In aircraft engines, manifold pressure is used to determine the power output of the engine and is often displayed on the manifold pressure gauge in the cockpit. Pilots use manifold pressure to adjust the engine settings for optimal performance during different flight phases, such as takeoff, cruising, and landing.

Manifold pressure can also be affected by factors such as altitude, throttle position, and engine condition. It is important for pilots and operators to monitor manifold pressure closely to ensure safe and efficient engine operation.