Follow the Liter – The Evolution of the Cummins 5.9L to the 6.7L Pickup Engine

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The Cummins 5.9L inline 6-cylinder was a fan favorite in RAM pickups for years, and when it evolved into the 6.7L Turbo Diesel mid year of 2007, a variety of enhancements – along with greater displacement – made it a real crowd pleaser. RAM owners gained a lot more power, improved fuel efficiency and a quieter, cleaner-running engine

Through the years, Cummins has promoted higher power density turbo charged diesel engines, and that dedication to power can be seen in today’s RAM pickups. As our technologies have evolved, the 6.7L Turbo Diesel continues the Cummins legacy of performance and legendary reliability.

The original 5.9L Cummins B-series engine was a revolution in its day, and the introduction of the ISB5.9 in 1998 gave RAM drivers even greater power. That engine’s four valves per cylinder and electronic engine management made it a favorite among drivers. During its nine-year run in RAM pickups, power numbers accelerated, growing from 215 HP and 420 lb-ft torque to 325 HP and 610 lb-ft torque.

To deliver more power and meet stricter emissions requirements, we knew the 5.9L would need to evolve in order to continue exceeding RAM owners’ expectations.

In January 2007, we introduced 6.7L Turbo Diesel for pickups, bringing a 13% increase in displacement and some exciting new technologies. Out of the gate, it bested 5.9L power output and met stricter emissions regulations.

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The model-year 2013.5 engine introduced a number of performance and environmental enhancements. The addition of SCR (Selective Catalyst Reduction) technology delivered a 10% boost to fuel efficiency and another increase in peak torque, while doubling the 6.7L’s oil change intervals.

The new 6.7L Turbo Diesel retains the familiar cast iron block and cylinder heads of the 5.9L, but advances in fuel and air delivery change nearly everything else, especially power ratings and maintenance intervals – now at 15,000 miles. The 6.7L produces up to 900 lb-ft torque and 385 HP. Plus, full torque is reached at a low 1,700 RPM. This makes the ride in today’s Cummins-powered RAM 2500 and 3500 models quieter, smoother and more powerful than ever before. Beyond the benefits of increased displacement, advances in Cummins technology continue to set the bar for power, fuel economy, durability and clean emissions.

The Cummins 5.9L B series turbo diesel engine blazed the trail that the 6.7L travels today, elevating performance in 3/4- and one-ton pickups and large commercial chassis cab applications. The versatility and efficiency of the 6.7L Cummins is reflected by its commercial brother, the ISB6.7, a leader in the medium duty truck, marine, and industrial markets.

5.9L 12V (6BT) Specs

Production Years....... 1989 - 1998

Horsepower................ 160 - 215 @ 2,500 RPM

Torque...................... 400 - 440 lb-ft @ 1,600 RPM

Configuration............ Inline 6 cylinder

Displacement............ 5.9 liters/359 cubic inches

Engine Block............. Cast iron

Cylinder Head........... Cast iron

Fuel System.............. Direct Injection Bosch VE44/Direct Injection Bosch P7100

Aspiration.................. Turbocharged / Intercooler (mid-1991 model year)

Valvetrain.................. OHV, 2 valves per cylinder

 

5.9L 24V (ISB) Specs

Production Years....... 1998 - 2007

Horsepower................ 215 - 325 @ 2,700-2,900 RPM

Torque...................... 420 - 610 lb-ft @ 1,400-1,600 RPM

Configuration............ Inline 6 cylinder

Displacement............ 5.9 liters/359 cubic inches

Engine Block............. Cast iron

Cylinder Head........... Cast iron

Fuel System.............. Direct Injection / Direct Injection - Common Rail (beginning MY 2003)

Aspiration.................. Turbocharged / Aftercooled

Valvetrain.................. OHV, 4 valves per cylinder

 

6.7L (ISBe) Specs

Production Years....... 2007 - present

Horsepower................ 350 - 385 @ 2,800-3,013 RPM

Torque...................... 610 - 900 lb-ft @ 1,500-1,700 RPM

Configuration............ Inline 6 cylinder

Displacement............ 6.7 liters/408 cubic inches

Engine Block............. Cast iron

Cylinder Head........... Cast iron

Fuel System.............. Direct Injection - Common Rail

Aspiration.................. Turbocharged / Aftercooled

Valvetrain.................. OHV, 4 valves per cylinder

Check Out the Cummins 6.7L Turbo Diesel

Cummins Office Building

Cummins Inc.

Cummins is a global power leader that designs, manufactures, sells and services diesel and alternative fuel engines from 2.8 to 95 liters, diesel and alternative-fueled electrical generator sets from 2.5 to 3,500 kW, as well as related components and technology. Cummins serves its customers through its network of 600 company-owned and independent distributor facilities and more than 7,200 dealer locations in over 190 countries and territories.

How will the future worksite reduce its environmental impact?

Cummins Worksite of the Future -

This article is part of our 'Worksite of the Future' series of articles, where we look at the trends that will shape the future of the construction industry. 

Today’s cities are rapidly changing as they race to decarbonize. So, how does this impact the construction industry? According to the World Green Building Council (WorldGBC), 11% of the world’s carbon emissions come from the construction industry; producing the materials and constructing the buildings. The WorldGBC issued a vision in September 2019, outlining how these carbon emissions could be reduced 40% by 2030 through many collaborative actions, including ambitious public procurement policies and clean and lean construction processes. 

Cummins Inc. is supporting this initiative through powering construction equipment on site. Our business strategy and product portfolio are evolving to meet the needs of our customers and the environment, holistically, with current and new technologies. But, how does this relate to the construction site of the future? 

Innovation: Powering the Worksite of the Future

For over 100 years Cummins has been a leader in advancing diesel technology. Efficient combustion strategies coupled with sophisticated air-handling and aftertreatment technologies have enabled Cummins engines to reach near zero emissions levels, exceeding many of the current regulations around the globe. The same technology advancements that contributed to reduced emissions have also produced higher power density, more torque and quieter operation than earlier engine versions. The latest Performance Series product line-up, ranging from 3.8L to 15L (75-503 kW), produces on average, 10% more power output and 20% more torque than their predecessors. Higher power density and more torque from these engines contributes to more productive machines, and in some cases reduces the size of the engine needed for the machine.  

Cummins will continue to innovate diesel engine technology, as we believe it will be an integral part of many industries for years to come. The higher horsepower from a smaller, lighter package seen in our Performance Series engines is a pointer to where we expect the development of advanced diesel to continue in the future.

Simultaneously, new technologies are emerging including electrified systems and hydrogen fuel cell. Solutions such as these will be needed as the construction community seeks to reach sustainability plans introduced by WorldGBC, local municipalities and other organizations. To demonstrate capabilities Cummins has worked with two well-known OEM partners, Hyundai and XCMG, to produce the world’s first Cummins powered electric mini excavators featuring Cummins BM4.4E battery modules. Both machines eliminate gaseous tailpipe emissions and nearly eliminate operational noise. 

Mini excavators and other compact construction equipment are prime candidates for early adoption of these electric systems because of how and where they are typically used. These machines are designed for small and mid-sized projects requiring a lighter duty cycle than their larger cousins. Their compact size makes them a great fit for smaller crowded sites often found in densely populated urban areas. Coincidentally, urban areas are increasingly seeking noise and emissions reductions to comply with city ordinances and air quality targets. Other light and medium duty cycle applications such as wheeled loaders and telehandlers will also be good candidates for electric drive systems. 

Heavy-duty cycle applications such as full-sized excavators, graders and mobile cranes will continue to rely on advanced diesel such as the new performance series product line, or hybrid systems to get the job done for years to come. In a hybrid application, the drivetrain combines diesel and electric power for more efficient operation. This could be in a mild, parallel or series configuration depending on the type of machinery and its duty cycle. Whichever system is used, fuel consumption and emissions are reduced. From a business perspective, the savings needs to be enough to pay for the additional cost of the hybrid technology which is not always the case.

Similarly, fuel cells could be applied in much the same way a diesel engine is used in the hybrid system. The fuel cell delivers a steady electrical feed to the battery or batteries, eliminating the need for a recharge period. Fuel cell systems will allow heavy duty machines to act much like their diesel counterparts without impacting their performance or downtime, while being completely emissions free, aside from harmless water vapor. While theoretically this seems like a great option the business case just does add up yet. Sustainable production of hydrogen is also a challenge that needs addressing before hydrogen becomes a main stream fuel source for the construction industry.   

Ensuring Environmental Sustainability

Preserving the environment is an important initiative, and Cummins’ dedication to affect change goes beyond the products. Our recently released PLANET 2050 strategy outlines how we will do our part to address climate change and other global environmental challenges. Future construction sites will adapt by improving the efficiency of diesel-powered machines and begin using machines with alternative fuels and other technologies to reduce their carbon footprint. Cummins will partner with our customers to deliver the right technology for the application at the right time.

Learn More and Join the Conversation

Join the conversation with #Cummins on your social platforms or visit https://www.cummins.com/engines/construction to learn more about our current and future product solutions. We also have Cummins experts around the world happy to answer your questions. Find your nearest Cummins professional by visiting care.cummins.com or calling 1-800-Cummins. 

Cummins Office Building

Cummins Inc.

Cummins is a global power leader that designs, manufactures, sells and services diesel and alternative fuel engines from 2.8 to 95 liters, diesel and alternative-fueled electrical generator sets from 2.5 to 3,500 kW, as well as related components and technology. Cummins serves its customers through its network of 600 company-owned and independent distributor facilities and more than 7,200 dealer locations in over 190 countries and territories.

Dropping the sails and powering up with Cummins

MV Brigadoon

Cummins engine receives a major overhaul after boat owner commits to a power vessel after years spent sailing the Pacific Northwest.

A couple from Seattle, Washington (USA) spent the first half of 2020 refitting their new Hampton 490 Pilothouse power boat. Chris Jones grew up around marinas and has owned a variety of boats throughout his life. Most recently, he and his wife have been cruising around the Puget Sound in their Hunter 46 sailboat. But with the turn of the new year, they decided to trade in the slow and steady lifestyle of sailing for a new power boat – the M/V Brigadoon.

After identifying they were ready to make the switch back to faster speeds, Chris and his wife began narrowing down what kind of vessel they were looking for. After weeks of extensive research, they found two Hampton boats available that met their requirements for quality, systems and seaworthiness.

Jones ventured down to California to look at one of the options, and at first glance thought the vessel had too much work to be done. But as the couple explored other boats, even comparing her to the alternative Hampton in the area, they found the M/V Brigadoon had the most potential.

But it would not be without major rework. The vessel needed a massive overhaul for the engine, control systems, and cosmetics. The 20-year-old boat only had 800 hours on it, which is quite low for an engine of that age. After years of sitting idle, it needed some tender love and care.

MV Brigadoon - Cummins

With an eye for improvement, Jones left his new acquisition in the hands of Marine Diesel Services in Newport Beach, California. The significant overhaul of his Cummins 6CTA 8.3 series engine included replacing aftercoolers, turbo chargers, hose clamps, seals, etc. Chris said, “They really did fantastic work on the boat. I have a lot of confidence in the power plant and that it has been adequately serviced.”

Once the mechanical work was complete, the M/V Brigadoon was ready to be delivered to the Pacific Northwest. At Emerald Harbor Marine, she received electrical work and new alternators, wiring, and navigation system. Finishing touches included more minor maintenance and a fresh paint job.

MV Brigadoon - Cummins

Six months have passed since the Jones’ heralded the M/V Brigadoon as their own. In mid-July, they put their new baby into the water for their first cruise since stepping off their sailboat last year. Looking forward to the speed and freedom of a power boat once again, they intend to vacation in the San Juan islands during their shakedown cruise and find new ports to explore.

For more photos and information about the M/V Brigadoon refit or to follow her journey, check out Chris Jones’ Instagram.

Katie Yoder - Cummins Inc.

Katie Yoder

Katie Yoder is a Marketing Communications Specialist. New to Cummins in 2018, Katie joined the marketing operations team where she supports trade show initiatives in North America. As a University of Wisconsin alumna, Katie enjoys watching Badger sports in her free time.

How technology can help customers save over $30 million in fuel and avoid enough pollutants to fill a 15-mile long train

Think of a train loaded with 40 foot containers as long as the distance between your home and work (about 15 miles). This is what it would take to load all the pollutants avoided, thanks to the state-of-the-art technology used in Cummins Tier 4 high horsepower engines.

Cummins Tier 4 high horsepower engines have recently exceeded 10 million operating hours. These engines feature state-of-the-art technology significantly reducing the emission of environmentally harmful pollutants such as particulate matter (PM) and oxides of nitrogen (NOx). You can see these engines featuring the latest emissions technology in operation in many applications ranging from railroad locomotives and marine vessels, to mining and oil and gas equipment.  

Let’s cover two reasons why Cummins’ Tier 4 technology is increasingly popular across many industries.

Reduced fuel usage means over $30 million of financial gains for customers and over 300,000 barrels of fuel savings for our planet

Owners of Cummins Tier 4 high horsepower engines are enjoying lower operating costs, since the fuel efficiency of these engines improved by up to 5% over Tier 2 engines, depending on the equipment duty cycle.

With 10 million running hours so far, we estimate our customers using Cummins Tier 4 high horsepower engines have experienced over $30M  of financial gains in the form of reduced fuel costs. This also translates into over 300,000 barrels of fuel savings for our planet.

Reduced environmental footprint is equal to removing the pollutants produced by over a half million cars

The technology Cummins uses in its Tier 4 engines significantly reduces PM and NOx emissions compared to earlier Tier 2 applications. PM contains microscopic solids or liquid droplets that are harmful to human health. A Tier 4 high horsepower engine with Cummins technology reduces PM emissions by 80% over a Tier 2 counterpart. NOx is most commonly known as the cause of smog, the brown sky often seen in large cities, and it also causes acid rains. A Cummins Tier 4 high horsepower engine emits 45% less NOx than a Tier 2 counterpart. 

Tier 4 technology delivers significant reductions in emission of harmful pollutants
Tier 4 technology delivers significant reductions in emission of harmful pollutants

These reductions in the environmental footprint add up quickly; 10 million operating hours across these Cummins engines translates into over 50,000 tons of PM and NOx avoided. Just the reduction in NOx emission is equivalent to taking more than 600,000 cars out of traffic for a year.

“Our mission at Cummins is to make people’s lives better by powering a more prosperous world, and this comes in many forms. In this case, our technology is helping our customers reduce their environmental footprint and decrease their operational costs while they enjoy excellent productivity,” said Gary Johansen, Executive Director of Power Systems Engineering at Cummins Inc.

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Aytek Yuksel - Cummins Inc

Aytek Yuksel

Aytek Yuksel is the Content Marketing Leader for Cummins Inc., with a focus on Power Systems markets. Aytek joined the Company in 2008. Since then, he has worked in several marketing roles and now brings you the learnings from our key markets ranging from industrial to residential markets. Aytek lives in Minneapolis, Minnesota with his wife and two kids.

Machine of the Month: Oxbo 9240 Coffee Harvester

Oxbo 9240 Coffee Harvester

Worldwide, more than 2.25 billion cups of coffee are consumed daily. On average it takes around 70 beans to brew each cup. Each bean starts its life as a coffee cherry that must go through a process which includes harvesting, processing, drying, milling, tasting, exporting, roasting, and grinding to become what you would recognize as coffee.   

From hand picking to mechanical measures, there are several ways to harvest the cherries that contain coffee beans. For almost two decades, Oxbo has been a leader in producing high quality coffee harvesters that mechanically pick the cherries. The next generation of these harvesters is the Oxbo 9240.  

Oxbo 9240 Coffee Harvester

Designed to harvest in rugged terrain, the Oxbo 9240 has a wide wheel base and 3-wheel design to improve maneuverability. The machine is manufactured for the South American market and features a low mounted Cummins QSF2.8 Tier 3 engine rated at 72 horsepower (hp). The engine position helps the harvester maintain a lower center of gravity for greater stability. 

To harvest the cherries, a picking head uses a horizontal shaking action to remove the cherries while a high-density, low-loss catcher gently surrounds the tree to provide greater retention. Once the coffee cherries have been picked, the 9240 has both a cleaning system that effectively removes leaves and small sticks. 

Who knows, the next coffee you drink might have been picked with Cummins power! 

Cummins Office Building

Cummins Inc.

Cummins is a global power leader that designs, manufactures, sells and services diesel and alternative fuel engines from 2.8 to 95 liters, diesel and alternative-fueled electrical generator sets from 2.5 to 3,500 kW, as well as related components and technology. Cummins serves its customers through its network of 600 company-owned and independent distributor facilities and more than 7,200 dealer locations in over 190 countries and territories.

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