The Cummins N14 is a popular diesel engine that is primarily installed in commercial trucks, recreational vehicles, and agricultural and construction equipment. Built on a base 855-cubic-inch Cummins engine, the N14 was produced from the late 1980s through 2000, when it was discontinued and replaced by the ISX line of engines. The N14 received a few minor updates throughout its years of production, but it stayed the same at its core.
Power Specs – Cummins N14 Engine Specs
The Cummins N14 is capable of producing between 310 and 525 horsepower, depending on the turbo size chosen by the vehicle manufacturer. It is also capable of generating 1,250 to 1,850 pound-feet of torque at 1,200 RPM. As an OEM engine supplier to vehicle manufacturers, Cummins offers a large number of turbo-equipped configurations for the N14 diesel-powered engine. The amount of engine power required from the N14 is often dependent on the purpose of the vehicle receiving the N14 engine.
EPA and fuel updates – cummins n14 wikipedia
To comply with regulatory changes made by the Environmental Protection Agency, Cummins had to slightly change the fuel system of the N14 in the early 1990s. Cummins took this opportunity to mark its modified fuel system as “Celect.” It used an electronic control module to regulate the amount of fuel delivered to the new electronic fuel injectors.
Technical Specifications – Cummins N14 Specifications
The N14 engine’s ignition fires its cylinders in the order of 1, 5, 3, 6, 2, 4. It has an intake valve clearance of 0.014 inches and an exhaust valve clearance of 0.027 inches. The motor brake free play is 0.023 inch. The N14’s operating oil pressure at idle is 10 pounds per square inch, increasing to 25 pounds per square inch at 1200 RPM. When starting, the engine operating fuel pressure is 25 pounds per square inch and 120 pounds per square inch at 1200 RPM.