Bosch P7100 Injection Pump for Dodge Cummins (12-Valve)

Bosch P7100 Injection Pump for Dodge Cummins (12-Valve)

The Bosch P7100 (often referred to as the "P-Pump") is the mechanical fuel injection pump used on the 1994–1998 Dodge Ram 2500/3500 equipped with the 5.9L 12-valve Cummins engine. It is legendary in the diesel performance community for its reliability, massive fuel delivery potential, and purely mechanical operation.

Key Features & Performance Characteristics

• Mechanical Reliability: Unlike modern common-rail systems, the P7100 is entirely gear-driven and controlled by mechanical linkage. It requires no electronic control module (ECM) to time or fuel the engine.

• High-Volume Fueling: The pump utilizes a single high-pressure plunger and barrel per cylinder. By replacing these internal components with larger-diameter "barrels and plungers" (often referred to as 12mm, 13mm, or larger), tuners can significantly increase the fuel volume to support high-horsepower builds.

• Adjustability: Enthusiasts can modify the fuel plate, AFC (Air Fuel Control) housing, and delivery valves to fine-tune the torque curve, smoke output, and horsepower delivery of the engine.

• Durability: The P7100 is lubricated by the engine's diesel fuel, making it robust enough to handle high-mileage duty cycles provided the fuel is kept clean and free of water.