DodgeTalk Forum banner
Not open for further replies.
1 - 14 of 14 Posts

Originating Member
35,160 Posts
Discussion Starter · #1 ·
Dodge Introduces Cleaner, Quieter and More Powerful 6.7-liter Cummins Turbo-Diesel Engine at State Fair of Texas Engine Available in January on New 2007 Dodge Ram 2500 / 3500 Models

  • Increased output with 350 horsepower and 650 lb.ft. of torque
  • New, fuel-savings six-speed automatic transmission features best-in-class gear-ratio spread; standard Electronic Range Select (ERS)
  • First-ever integrated exhaust brake available direct from factory
  • 50-percent quieter engine; 3Dba reduction in cabin sound levels
  • Life-to-major overhaul intervals of 350,000 miles, providing more than a 100,000-mile advantage over the competition
Dallas, Sep 28, 2006 - The war among America’s diesel-powered pickup trucks rumbles into a new round with Dodge announcing more horsepower, torque, refinement and a host of advanced towing features.

Today at the State Fair of Texas, Dodge will reveal more details about the 2007 Dodge Ram Heavy Duty’s new 6.7-liter Cummins turbo-diesel engine, which replaces the current 5.9-liter engine. Producing 350 horsepower at 3,000 rpm and 650 lb.-ft. of torque at 1,500 rpm, the 6.7-liter engine features an all-new six-speed automatic transmission that delivers improved fuel economy and performance.

The engine will be available in 2007 Dodge Ram 2500 and 3500 models beginning January 2007. A commercial-use 6.7-liter Cummins turbo-diesel engine was introduced in early 2006 with the all-new Dodge Ram Chassis Cab, which is available now.

“The 2007 Dodge Ram Heavy Duty’s new 6.7-liter Cummins turbo-diesel engine sets the performance standard with an outstanding combination of horsepower, torque, refinement and emissions-reducing technology,” said Scott Kunselman, Chief Engineer – Dodge Ram. “Providing superior trailer towing, acceleration, throttle response and drivability, the new 6.7-liter engine is not only more powerful, it's also cleaner with B5 biodiesel compatibility and a reduction in particulates and nitrogen oxide (NOx) that comply with the 50-state 2007 heavy-duty emission standards.”

Based on the proven DNA of the 5.9-liter Cummins turbo-diesel engine, the new 6.7-liter engine is 50-percent quieter, while featuring a 107mm bore by 124mm stroke (versus 102mm bore by 120mm stroke for the 5.9-liter engine). The new engine retains more than 40 percent of its components from the 5.9-liter engine and shares more than 80 percent of its components with the new Dodge Ram chassis cab.

The high-performance 408-cubic-inch inline-six intercooled turbo-diesel is clean and quiet, and meets all 2007 U.S. federal and state emission requirements, which require a 90-percent reduction in particulate matter and 50-percent reduction in NOx.

Offered for the first time in Dodge Ram Heavy Duty trucks are features including an integrated exhaust brake, standard Electronic Range Select (ERS) and “Smart” tow/haul controls that provide customers flexibility and increased safety when towing heavy loads.

Improved Performance, Durability and Emissions
Dodge Ram Heavy Duty’s new 6.7-liter turbo-diesel engine features improved performance, durability and significantly reduced emissions.

Enhancing diesel-powered performance of 2007 Dodge Ram Heavy Duty trucks is an electronically-controlled Variable Geometry Turbocharger (VGT), which precisely matches boost pressure with the engine’s needs. The 6.7-liter engine’s VGT utilizes 16 fixed vanes and a sliding yoke, providing variable geometry, as well as an electric valve. The VGT produces optimum combustion control, reduced emissions and a quiet and lag-free throttle response.

Decreasing NOx emissions is a next-generation cooled Exhaust Gas Recirculation (EGR) system. The Cummins 6.7-liter engine’s EGR system is water cooled, with the air reintroduced into the intake system, keeping turbo and intercooler components clean, which increases the engine’s durability.

Within the 6.7-liter Dodge Ram Heavy Duty exhaust system, reducing particulate matter is achieved through a self-cleaning Diesel Particulate Filter (DPF). The muffler is isolated from the emissions control system, therefore customers may remove the muffler without violating emissions compliance. The emissions system is designed for a government-certified 120,000 miles.

As durable as it is powerful, the Cummins 6.7-liter turbo-diesel engine has life-to-major overhaul intervals of 350,000 miles, providing more than a 100,000-mile advantage over the competition.

Quiet and Refined Driving Experience
In addition to improving emissions and durability, occupant comfort is central to the 2007 Dodge Ram Heavy Duty. The new 6.7-liter turbo-diesel engine incorporates several new features that contribute to a 50-percent quieter engine and a 3 Dba reduction in cabin sound levels, increasing the vehicle’s overall refinement.

New engine mounts, a constrained-layered oil pan, intake silencer and engine-block shield create a quiet cabin environment inside the 2007 Dodge Ram Heavy Duty. In addition, an over-running alternator pulley eliminates sounds generated from the diesel-engine shut down process, and machined crankshaft counter weights significantly contribute to quiet acceleration.

First-ever Optional Exhaust Brake
For the first time in a Dodge Ram Heavy Duty truck, an integrated exhaust brake is available direct from the factory. Utilizing the 6.7-liter Cummins turbo-diesel engine’s new turbocharger, the exhaust brake significantly improves control when towing heavy applications, such as pulling RV fifth wheels and horse trailers, providing added control and brake savings by transforming horsepower into braking power.

“Towing and hauling capability is critical for our customers, as more than 90 percent of Dodge Ram Heavy Duty customers tow with their truck,” said Kunselman.

Benefits of the exhaust brake include:

  • Increased vehicle control to provide the owner additional peace of mind when towing
  • Enhanced safety by reducing overheating and fading of brakes on downhill grades
  • Lower cost of ownership, extending brake life by as much as three times
  • Capability for faster cold-weather cab warming
The 2007 Dodge Ram Heavy Duty’s 6.7-liter Cummins turbo-diesel engine’s VGT is capable of creating the maximum exhaust restriction through a wide range of operating speeds, improving braking performance at low and high engine speeds. Testing has shown more than a 30 percent improvement in retarding torque at 2000 rpm compared with traditional brake exhaust methods.

Six-speed Automatic Transmission with Electronic Range Select (ERS)
Mated to the 6.7-liter Cummins turbo-diesel engine is a new six-speed 68RFE automatic transmission, which delivers optimum fuel economy and performance. A new Electronic Range Select (ERS) system is integrated with the transmission, enabling customers to select desired gears that match driving conditions.

The new six-speed automatic transmission features a best-in-class gear ratio spread of 5.16:1, allowing for superior launch capability. The sixth gear, also known as the second overdrive gear, provides an extremely low rpm at highway speeds, improving Dodge Ram Heavy Duty’s fuel economy and passenger comfort. In addition, an added compounder and two clutches provide optimal shift quality, improved quietness and durability.

The transmission’s new ERS system complements the 2007 Dodge Ram Heavy Duty’s tow/haul mode, allowing for driver-actuated gear selection with a shifter-mounted switch. ERS provides greater control in unique driving conditions, such as towing heavy loads on severe inclines. The system includes electronic safeguards to prevent shifting that could cause engine damage.

In addition to more horsepower and torque, Dodge Ram Heavy Duty boasts towing capability of 16,400 lbs., a payload of 5,020 lbs. and Gross Combined Weight Rating (GCWR) and Gross Vehicle Weight Rating (GVWR) of 23,000 lbs. and 12,200 lbs., respectively.

The 2007 Dodge Ram Heavy Duty provides a combination of standard and optional features that make towing easier, such as a Class IV hitch receiver with a seven-circuit wiring harness, 750-amp battery, heavy-duty engine cooling and an auxiliary transmission oil cooler.

Distinctive trailer-tow mirrors featured on Dodge Ram Heavy Duty trucks offer a large rear-viewing area that may be customized to drivers’ needs and preferences. Mirrors provide two views on both sides: close-up and wide-out. In addition, mirrors flip up 90 degrees for viewing beyond wide trailers.

Chrysler Group Diesel-powered Models
In the United States, current diesel-powered models include the Dodge Ram Heavy Duty, Dodge Sprinter and the new 3.0-liter V6 diesel Jeep Grand Cherokee, which hits the market in early 2007. In 1988, the Chrysler Group made a significant impact with the introduction of the Cummins 5.9-liter I-6 in heavy duty applications. Customer recognition is still exceptional and will continue with the new Cummins 6.7-liter turbo diesel.

In Europe, diesel-powered models account for more than half of Chrysler Group sales. The Chrysler 300C, Chrysler PT Cruiser and Dodge Caravan models continue to be popular.

Advanced diesel technology is part of the Chrysler Group’s advanced propulsion technology umbrella, which also includes efficient gasoline engines, hybrids, flex-fuel vehicles and biodiesel capability.

Dodge Brand
With a U.S. market share of 7 percent, Dodge is the Chrysler Group’s best-selling brand and the fifth largest nameplate in the U.S. automotive market. In 2005, Dodge sold more than 1.4 million vehicles in the global market. Dodge continues to lead the minivan market with a 19 percent market share in the U.S. In the highly competitive truck market, Dodge has a 16 percent market share. This year, Dodge enters key European volume segments.

Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions, and electrical power generation systems. Headquartered in Columbus, Indiana, Cummins serves customers in more than 160 countries through its network of 550 company-owned and independent distributor facilities and more than 5,000 dealer locations. Cummins produces the diesel for the Dodge Ram 2500 and 3500 series.

2007 Dodge Ram Heavy Duty Cummins 6.7-liter Turbo-diesel Engine Details

6.7L 107mm bore x 124mm stroke
High swirl (2.4 DCS) combustion system
17.2:1 Compression ratio
Machined crankshaft counter weights
Viscous vibration damper

Air Handling
VGT – sliding nozzle (16 vane to eliminate turbine blade pass whistle)
Cooled EGR with cold-side EGR valve
Air inlet throttle
EGR cooler bypass
CCV with coalescing filter

Oil system
Tested with low ash oil API CJ4 (PC10)
Drain interval – 7500 miles
Total capacity – 13 qts on initial fill
Sump capacity – 9 qts low, 11 qts high
Typical oil change capacity – 12 qts
Dump to sump to provide oil pressure quicker
Constrained layer oil pan to reduce transmitted noise

Fuel system
Bosch 3rd generation common rail system
7 micron spin on filter
Tested with ultra low sulfur fuel – 15 ppm
Approved for bio-diesel fuel

Cooling system
Molded composite impeller for improved coolant flow

CM2100 ECM
Double the CPU processing speed (40 to 80 MHz)
40% increase in memory

Constrained layer oil pan
Over running alternator pulley (eliminate shut down squeal)
Intake silencer
Machined crankshaft counter weights
Combustion system (multi injection events)
Block shields
Pulleys modified to reduce ‘speaker’ effect
Stuffer between transmission adapter and pan
Viscous vibration damper



Availability_________________________________ Opt.—2500, 3500; available Jan. 1, 2007
Type and Description________________ Six-cylinder, inline, liquid-cooled, turbocharged, intercooled
Displacement_________________________________________ 408 cu. in. (6690 cu. cm)
Bore x Stroke__________________________________________ 4.21 x 4.88 (107 x 124)
Valve System________________________________________ OHV, 24 valves, solid lifters
Fuel Injection__________________________________ Electronic high-pressure common rail
Construction__________________________________________ Cast-iron block and head
Compression Ratio__________________________________________________ 17.3:1
Power (SAE net)____________________________________ 350 bhp (261 kW) @ 3,000 rpm
Torque (SAE net)____________________ 650 lb.-ft. (881 N•m) @ 1,500 rpm w/6-spd. automatic; 610 lb.-ft. (827 N•m) @ 1,400 rpm w/6-spd. manual
Maximum High-idle Engine Speed______________________________________ 3,500 rpm
Fuel Requirement________________________________________ Ultra Low Sulfur Diesel
Oil Capacity___________________________________________ 12 qt. (11.3L) with filter
Coolant Capacity_____________________________________________ 29.5 qt. (28.0L)
Emission Controls_________________ Exhaust after-treatment systems and internal engine features


Availability_______________________ Opt. with 6.7L turbo diesel engine; available Jan. 1, 2007
Description______________________ Three planetary gear sets, one overrunning clutch, full electronic control, electronically controlled converter clutch
Gear Ratios
__ 1st__________________________________________________________ 3.231
__ 2nd_________________________________________________________ 1.837
__ 3rd__________________________________________________________ 1.410
__ 4th___________________________________________________________ 1.0
__ 5th__________________________________________________________ 0.816
__ 6th__________________________________________________________ 0.625
__ Reverse_______________________________________________________ 4.444
Overall Top Gear Ratio____________________ 2.33 with 3.73 axle ratio; 2.56 with 4.10 axle ratio

35,849 Posts
Notice the automatics are rated for 650 pounds torque but the 6 gears are only 610

101 Posts
So is the Electronic Range Select in the auto tranny like an autostick?

******* Yankee
2,509 Posts
Put this in the Power Wagon and you have yourself the ultimate 3/4 ton truck.

4x4, Straight pipe roar!
2,538 Posts
wow, 50 percent quieter than the current 5.9? Won't be able to hear the thing run. Too quiet for me. That 6 speed auto should be pretty sweet though.

3,695 Posts
I think I will have to order one, looks like there is finally a good reason to replace the V-10, that and my new 5th is 35ft:)

4,451 Posts
threetwos said:
Dang! I maybe shoulda waited?
if you are interested in mods you should not have waited. The word is that all the new emission stuff will make it tough to mod them. It's like comparing a 69 camaro to a 1974. The only thing that this new rig really has on the prior trucks is possibley a better trans but who knows. I doubt you want the new one for the quietness otherwise you would have got a 3g ram. A few mods and you'll be putting out numbers that surpass the 07.

5,442 Posts
Please Josh dont EVER compare a CTD to a camaro! Hah just kiddin bud, yes you are totally correct I have heard the same thing as well. I guess thats why its hard to find 1st gen cummins trucks cause all the pullers want em. Seriously I am not sorry I got mine then cause I will never pull anything bigger than my vintage Challenger, I just wanted the H.D. rig out there and I get 20 MPG with my sixspeed! The new trucks are gonna be awesome and dont count the aftermarket out on mods. There is HUGE money in hotrodded diesels right now and that is what drives inventions not necessity.

Same Name, Different Game
9,638 Posts
I may have to seriously consider a new Mega Cab with this new diesel!

Do It In A Van
8,045 Posts
A 6.7L I6? Good gravy, those cylinders must be as big as Folgers coffee cans!

5,442 Posts
The better to build a hammer with my pretty! Build a DIESEL Hammer and nail that phord or shivy, next year we will be a nailin ***** and jap diesels too! :gr_patrio. Seriously, The current ISB 6T is a great engine. The current market and competitors trucks has forced Dodge and Cummins to step up the power and Durability. I think this will be another gem of an engine and the aftermarket is already working on the next gen. boost boxes to turn the power up.Dodge will change the Ram,Dakota Durango next year and this has to be done to exceed the market share those trucks cater to. I hope they will be marketable against the Chinese made trucks and eventually an asian diesel heavy duty truck, which you know will be low priced.


'02 Dakota QC SLT Plus
375 Posts
Air Handling
VGT – sliding nozzle (16 vane to eliminate turbine blade pass whistle)

That's the fun of hammering down on a diesel - to hear the turbo spool up and make that really cool sound...
1 - 14 of 14 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Not open for further replies.