The Cummins Engine Company was founded in Columbus, Indiana, in 1919. Dodge began using the Cummins B-Series 5.9L diesel engine it its 1989 Ram pickup trucks, marking a true medium-duty diesel engine available in a light-duty truck for the first time. Other vehicles had used diesel engines prior to that, but they were much smaller and less powerful. Dodge continues to use Cummins diesel engines in its heavy-duty Ram 2500 and Ram 3500 pickup trucks today.
The First Dodge Cummins Diesel Engines
The Cummins engines Dodge used from 1989 to 1994 used a single 804 CPL, were not air cooled and had a peak boost pressure of 22 to 25psi. These engines peaked at 2,5000 rpm, used a Bosch VE rotary injection pump that often maxed out at 220 to 230 hp.
1998 and the Interact System B-Series
In 1998, Cummins introduced a new 5.9L pushrod-operated, non-adjustable engine with four-valve cylinders. This engine was part of the Interact System B-Series, and Dodge used it in the 1998 Ram 2500 and the Ram 3500. It was a 230hp, in-line, six-cylinder engine with four valves per cylinder in a 24-valve OHV configuration. It had a 5,883cc displacement, a bore and stroke of 4.02 inches by 4.72 inches and a compression ratio of 17.5:1. It produced a maximum torque of 450 lb.-ft. at 1,400 rpm.
2010 Dodge Ram 2500 & 3500 with Cummins Diesel Engine
Dodge redesigned the Ram series for 2010 but continued to use Cummins diesel engines in the Ram 2500 and 3500. The Cummins used in the 2010 Dodge Ram is a 6.7L 350hp I6 with a 24-valve/OHV configuration, a 6,690cc displacement, a bore and stroke of 4.21 inches by 4.88 inches and a compression ration of 17.3:1. It has a maximum torque of 650 lb.-ft. at 1,500 rpm.
A five-speed automatic overdrive transmission is standard with 2010 Ram 2500s and Ram 3500s with the 6.7L Cummins engine, but six-speed automatic overdrive transmissions and six-speed manual overdrive transmissions are available options.
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