3 Million Engines and Numbers: The Cummins-Ram Partnership 33 Years in the Making


Three million engines is a very big number, and now it’s even bigger… In September 2019, Cummins celebrated the number of 3,000,000 engines – along with 30 years of production of diesel engines for Ram trucks – in the Cummins Mid-range Engine Plant (CMEP) in Columbus, Indiana. Back then, Ram Trucks had once again made the king of the hill with an all-new 6.7L high horsepower Cummins capable of producing industry-leading 1,000 lb-ft of torque. Since then, that same new and improved I-6 diesel has been made even better by returning to the proven CP3 high-pressure fuel pump used on previous engines.

But before all that, Cummins and Ram (actually dodging at the time) set a new standard for diesel-powered pickup trucks with the introduction of the 5.9L 6BT in 1989. Then they brought us the “P-pump,” a game-changing redesign of the body and then continued to ignite the torque wars in the mid-90s. Over the past three decades, they have always answered the call whenever Ford and GM have decided to increase their torque values ​​and guess what? They are currently back on top. Over the past 33 years, the Cummins and Ram partnership has been incredibly successful, and the following highlight reel illustrates why.

Mild by today’s standards, groundbreaking at the time

1989 Cummins 6BT 5.9L Diesel

While the Ram brand now has the popular Hemi petrol V-8 and the 6.7L Cummins at its disposal, it is rumored that the Dodge truck line was in agony in the late 1980s. The Cummins alliance was an immediate hit, and sales of ¾-ton and 1-ton Cummins trucks grew so quickly that Chrysler had to stop taking orders from its dealers. The engine that made it all possible was the 160 hp 6BT 5.9L Cummins, which delivered 400 lb-ft of torque – a number that was better than what Ford’s internationally produced 7.3L V-8 diesel produced (338 lb-ft). ft) and downsized what turned out to be GM’s 6.2L V-8 diesel (240 lb-ft). In addition, Cummins brought direct injection technology to the pickup segment for diesel engines, as well as turbocharger.

The Torque Wars begin

7.3L Power Stroke vs. 12-valve 5.9L Cummins

Following the great news that it was a turbocharged, direct-injection diesel engine (which also happened to outperform the competition’s bigger V-8s), Dodge redesigned its trucks for the ’94 model year. They sold like hot cakes and were even longer than GM trucks that year. And while the 5.9L Cummins looked unchanged under the hood of 2500 and 3500 models to many, there was one notable difference from the first-generation engine bay: a P-pump. With a Bosch P7100 inline pump hanging from the side of the Cummins, almost endless performance potential can be unlocked at any time. In factory form, and mated to the NV4500’s five-speed manual transmission, Ram owners got the more powerful version of the 5.9L Cummins, which produced 420 lb-ft of torque. After being beaten by Ford’s Navistar-built 425 lb-ft 7.3L Power Stroke in mid-94, Dodge and Cummins shot back by ramping up the 5.9L’s torque to 440 lb-ft in 1996.

First up to 600 LB-FT torque

Cummins 600 Common Rail Diesel Engine

The battle for best-in-class torque turned into a three-horse race when GM’s Duramax came out in 2001, but Dodge and Cummins had an answer to both the General’s 6.6L V-8 and the brand-new 6.0L Power Stroke from Ford. 2003. After the introduction of the Common Rail 5.9L Cummins, torque increased to a class-leading 600 lb-ft of torque in ’04 (this engine is also known as the “Cummins 600”). Then, coupled with a new turbocharger, injectors and pistons, torque increased again on the ‘04.5 version of the 5.9L, this time to 610 lb-ft.

Cummins number 2 million (2012)

2 million Cummins engines

Because the Cummins engine yield was so high for Ram’s 2500 and larger trucks, it wasn’t long before Cummins surpassed the 1 million engines supplied to the automaker. In December 2012, engine number 2 million made its way through CMEP’s assembly line. By this time (and since mid-2007), the 5.9L had been replaced by the more emissions-friendly 6.7L Cummins, a larger-bore, longer-stroke inline-six (4.21″ x 4.88″ vs. 4.02″ x 4.72″). Engine number 2 million, a 350 horsepower version rated at 800 lb-ft, was given a bright red valve cover to signify the milestone. But unlike engine number 3 million, this Cummins has never been in a Instead, the bike went on tour and traveled across the country to further promote Cummins and the Ram Truck brand.

The redesigned, 1,000 LB-FT 6.7L Cummins (2019)

6.7L Cummins High Output 2019 Ram

Before its 3 millionth engine appeared on the horizon, Cummins revolutionized the world of diesel pickups in early 2019 with the redesigned 6.7L. Supposedly revamped to withstand the stresses associated with 1,000 lb-ft of torque, the new high-performance Cummins was based on a stronger, lighter block made from compacted graphite iron (CGI) rather than gray iron. It also featured stronger forged steel connecting rods and lighter cast aluminum pistons that used low-friction washers and larger diameter wrist pins. In January 2019, Ram broke the news that the HO 6.7L Cummins intended for ’19 model year 3500 Series trucks was the first diesel in the pickup truck segment to hit the 1,000 lb-ft mark.

3 millionth Cummins

CMEP Cummins 3 Million Diesel Engines

Coincidentally, engine number 3 million production happened almost exactly 30 years after Cummins and Ram joined forces. Both milestones were celebrated in September 2019. As a special memorial to the owner of the 3 millionth Cummins produced, 20 Cummins employees—who were on the line in 1989 and still working for the company in 2019—were invited to sign the engine. dressing table. Reportedly lucky number 3 million went double in an Aries 3500 and is currently working on a farm. How appropriate.

Current situation: 1,075 LB-FT and rock solid reliability

2021 Cummins Diesel Ram 3500 Badge

Since celebrating 3 million engines and 30 years of business with Ram, Cummins has returned the common rail 6.7L to a CP3 high pressure fuel pump. After moving to the Bosch CP4.2 high-pressure fuel pump for 1920s and 1920s engines and experiencing the kind of failures this pump is notorious for, Ram and Cummins returned to the Bosch CP3 – a pump with a good track record for reliability and was used on both the 5.9L common rail and 6.7L from ’03 to ’18. In addition to this welcome replacement of the high-pressure fuel pump, Ram and Cummins raised the bar one more time in an effort to outshine Ford for first place at Torque Mountain. Following FoMoCo’s press release that the 2020 model year 6.7L Power Stroke would produce 475 horsepower and 1,050 lb-ft of torque, Ram responded with a 1,075 lb-ft version of the powerful 6.7L Cummins, available for the 2021 model year.

Cummins ownership is a lifestyle

Ram 2500 Cummins Diesel Nitto Ridge Grappler

It’s no secret that Ram owners take pride in their Cummins powerplants. In fact, it’s why many of them bought their trucks. It’s also no secret that Cummins fans love their engine’s ability to handle significant power and torque gains with minimal upgrades. In this example, a 6.7-liter-equipped 2012 Ram 2500 has been treated to turbo, tuning, and fuel changes, resulting in an ultra-reliable, bench-verified 570 horsepower and 1,165 lb-ft of torque. In more extreme applications, the 6.7L Cummins block is used (though heavily modified) in engines capable of producing over 3,500 horsepower!

  • The Torque Wars are real, believe us! U.S “Back in time” series follows all the major movements in the diesel pick-up segment over the past 30 years.

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