: The "Big Cam" evolution increased the camshaft diameter to 2.5 inches, shortening injection periods to create more torque at lower engine speeds and improving fuel efficiency.
: It uses the Cummins Pressure-Time (PT) self-adjusting fuel system, which provides accurate metering and timing through camshaft-actuated injectors. Performance and Durability Cummins Engine Nt855 Manual
: Because of its reliable mechanical nature, it is a staple for heavy-duty trucks, marine vessels, and industrial power generators. Technical Specifications Summary Displacement 14.0L (855 cubic inches) Configuration Inline 6-cylinder diesel Horsepower 250 – 475 HP (depending on configuration) Torque 1,000 – 1,650 lb-ft Oil Capacity Approx. 11 to 15 gallons (44–57L) NTA855-G4 - Cummins : The "Big Cam" evolution increased the camshaft
: The engine features an alloy cast iron block and head, forged-steel internals, and large bearings designed for extreme durability. Technical Specifications Summary Displacement 14