Cummins Inc. has released a new version of its High Output 6.7-liter Turbo Diesel engine for Ram Heavy Duty pickup trucks. The new high-output rating produces torque up to a peak of 800 lb-ft (1,085 N•m), and power is increased across an engine speed range of 1,200-2,700 rpm, delivering up to 46 additional hp at typical cruising speeds while maintaining 350 hp (261 kW) at 3,000 rpm.
Along with the higher torque rating, Cummins said the 6.7L Turbo Diesel continues to offer the most powerful integrated exhaust brake available in a heavy-duty pickup truck. The exhaust brake is rated at 222 braking horsepower. “The 6.7-liter Turbo Diesel’s base engine is the Cummins ISB, which is used in a variety of demanding applications and can produce significantly higher ratings than what is offered in pickup trucks,” said Scott Henry, chief engineer for the Cummins Turbo Diesel. “From an engineering perspective, our work to develop the high-output rating for the 6.7-liter Turbo Diesel was in the advanced-performance tuning. The crankshaft dampener was the only engine part we needed to change as a result of the increased torque.”