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NTC315
Cummins
The Cummins NTC315 Big Cam IV stands as a definitive icon of mechanical diesel engineering. As part of the legendary 14-liter "855" series, this engine is renowned for its raw durability, mechanical simplicity, and reliable 315 horsepower output. It was engineered during an era where brute strength and straightforward serviceability were paramount, making it a cornerstone powerplant for heavy-duty trucks in the 1980s and earning a lasting reputation for million-mile potential with proper care.
This engine was designed almost exclusively for one demanding role:
Heavy-Duty On-Highway Trucks: As a prime power source for long-haul tractors, dump trucks, and logging trucks from major manufacturers like Freightliner, Peterbilt, and Kenworth. Its torque and reliability made it a favorite for hauling heavy loads and navigating challenging terrain.
Legendary Mechanical PT Fuel System: The heart of the NTC315 is its Cummins PT (Pressure-Time) fuel system. This fully mechanical, gear-driven system is celebrated for its robustness, precise fuel metering, and ease of field adjustment and maintenance, eliminating dependence on complex electronics.
Proven "Big Cam IV" Architecture: The "Big Cam" designation refers to its large overhead camshaft design, which provided optimized valve timing for improved airflow and efficiency. This platform is known for its rugged cast-iron cylinder block and overall structural integrity.
Simplicity and Serviceability: Engineered for long life, key components like replaceable wet cylinder liners facilitate in-frame overhauls. The mechanical nature of all systems allows technicians to diagnose, repair, and fine-tune the engine with fundamental tools.
Proven Performance Platform: The NTC315 is known for its significant performance potential. With appropriate upgrades to components like pistons, turbochargers (such as the HT60 from an N14), injectors, and fuel system calibration, this platform can be reliably built to produce over 400 horsepower for even more demanding applications.
The Cummins NTC315 Big Cam IV stands as a definitive icon of mechanical diesel engineering. As part of the legendary 14-liter "855" series, this engine is renowned for its raw durability, mechanical simplicity, and reliable 315 horsepower output. It was engineered during an era where brute strength and straightforward serviceability were paramount, making it a cornerstone powerplant for heavy-duty trucks in the 1980s and earning a lasting reputation for million-mile potential with proper care.
This engine was designed almost exclusively for one demanding role:
Heavy-Duty On-Highway Trucks: As a prime power source for long-haul tractors, dump trucks, and logging trucks from major manufacturers like Freightliner, Peterbilt, and Kenworth. Its torque and reliability made it a favorite for hauling heavy loads and navigating challenging terrain.
Legendary Mechanical PT Fuel System: The heart of the NTC315 is its Cummins PT (Pressure-Time) fuel system. This fully mechanical, gear-driven system is celebrated for its robustness, precise fuel metering, and ease of field adjustment and maintenance, eliminating dependence on complex electronics.
Proven "Big Cam IV" Architecture: The "Big Cam" designation refers to its large overhead camshaft design, which provided optimized valve timing for improved airflow and efficiency. This platform is known for its rugged cast-iron cylinder block and overall structural integrity.
Simplicity and Serviceability: Engineered for long life, key components like replaceable wet cylinder liners facilitate in-frame overhauls. The mechanical nature of all systems allows technicians to diagnose, repair, and fine-tune the engine with fundamental tools.
Proven Performance Platform: The NTC315 is known for its significant performance potential. With appropriate upgrades to components like pistons, turbochargers (such as the HT60 from an N14), injectors, and fuel system calibration, this platform can be reliably built to produce over 400 horsepower for even more demanding applications.