The New Dodge Magnum 5.7L Hemi
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Press Release
The 5.7-liter HEMI® Magnum V-8
While completely re-engineered from the legendary 426 HEMI V-8 that powered Chrysler muscle cars of the 1960s, two features earn the new 5.7-liter HEMI power plant its HEMI name.
·The hemispherically shaped combustion chamber designed to accommodate large valves and put the spark plugs close to the center of the combustion chamber
·The cross-flow valve arrangement that is perpendicular to the crankshaft Centerline
Facts and Features
-The 5.7-liter HEMI® Magnum V-8 engine is an internally balanced pushrod (OHV) 90-degree V-8. The cast iron block is a deep skirt and cross-bolted design with cylinder bore spacing the same as the engine it replaces.
-The aluminum cylinder features a two-valve per-cylinder, hemispherical combustion chamber with dual spark plugs and a coil over plug ignition for best-in-class airflow and power. At an impressive 345 hp and 375 lb.-ft of torque, the 5.7-liter HEMI cranks out 41 percent more power and 12 percent greater torque than the 5.9-liter Magnum V-8 it replaces. And the power plant is 56 pounds lighter than its predecessor.
-An Integrated Air Fuel Module (IAFM) incorporates the function of 26 individual components in the induction and fuel system, thereby reducing cost, weight and engine plant complexity.
-The 5.7-liter HEMI marks Chrysler Group’s first application of an electronic throttle control system in a rear-wheel-drive vehicle. The system uses a DC motor with reduction gears to open and close the throttle, for optimal control of the airflow into the engine.
-A combination of the 5.7-liter HEMI and the new 545RFE five-speed automatic transmission will improve fuel efficiency for the heavy-duty pickup by 8-10 percent over the 5.9-liter V-8.
-A systematic approach to sealing, using premium elastomeric materials and state-of-the-art practices, helps ensure a leak-free, weep-free engine.
-The power plant’s simple and efficient design means servicing and repairs are easier and less costly.
Cylinder Deactivation
Chrysler Group Multi-Displacement System will be First Cylinder Deactivation Sold in North America on Modern, Large-Volume Vehicles
2005 Chrysler 300C and Dodge Magnum RT Will Feature HEMI® Power with Maximum Fuel Economy
Up to 20-Percent Improvement in Fuel Economy
Standard Equipment on Chrysler 300C and Dodge Magnum RT
Uncompromised HEMI® Power
Smoothly Transitions from Eight Cylinders to Four in Just 40 Milliseconds
Auburn Hills, Mich., Jan 05, 2004 -The 2005 Chrysler 300C and Dodge Magnum RT will be the first high-volume, modern production vehicles in North America to feature fully-functioning cylinder deactivation when they go on sale in the spring of 2004. The Multi-Displacement System (MDS) will be standard equipment on the Chrysler 300C and Dodge Magnum RT.
“The Chrysler Group MDS seamlessly alternates between smooth, high fuel economy four-cylinder mode when less power is needed, and V-8 mode when more power from the 5.7L HEMI® engine is in demand,” said Eric Ridenour, Executive Vice President Product Development, Chrysler Group. “This optimizes fuel economy when V-8 power is not needed, without sacrificing vehicle performance—2005 Chrysler 300C and Dodge Magnum RT owners will get the maximum benefit without any compromises.”
Owners of the Chrysler 300C and Dodge Magnum RT will receive the powerful benefit of the HEMI engine with the fuel economy that they would only expect from a smaller, less powerful engine.
“The MDS was part of the engine’s original design,” said Bob Lee, Vice President Powertrain Product Team, Chrysler Group. “This resulted in a cylinder-deactivation system that is elegantly simple and completely integrated into the engine design. The benefits are fewer parts, maximum reliability and lower cost.”
Some of the significant technologies enabling the Chrysler Group MDS are the speed of electronic controls, the sophistication of the algorithms controlling the systems and the use of Electronic Throttle Control. The HEMI will be able to transition from eight cylinders to four in 40 milliseconds (0.040 seconds).
The HEMI engine with MDS has completed over 6.5 million customer-equivalent miles through Chrysler Group’s development and durability testing. It is covered by the 7-Year/70,000-mile Limited Powertrain warranty.
The system deactivates the valve lifters. This keeps the valves in four cylinders closed, and there is no combustion. In addition to stopping combustion, energy is not lost by pumping air through these cylinders.
Customers will experience estimated fuel economy gains of up to 20 percent under various driving conditions, and a projected 10 percent aggregate improvement. Improved fuel economy is realized without any change in customer experience—drivers will receive the benefit without changing their driving habits and without compromising style, comfort or convenience.
Specifications
Type and description Eight cylinders, 90-degree V-type, liquid cooled
Displacement 345 cu. in (5,654 cu. cm)
Bore x stroke 3.92 x 3.58 (99.5 x 90.9)
Valve system Pushrod-operated overhead valves, 16 valves, hydraulic lifters with roller followers
Fuel injection Sequential, multi-port, electronic, returnless
Construction Deep-skirt cast iron block with cross-bolted main bearing caps. Aluminum alloy heads with hemispherical combustion chambers
Compression Ratio 9.6:1
Power (SAE net) 345 bhp (257 kW) @ 5400 rpm, (61.0 bhp/L), 2500 series
Torque (SAE Net) 375 lb.-ft (508) Nm) @ 4200 rpm 2500 series
Max. engine speed 5,800 rpm
Fuel requirement Unleaded mid-grade, 89 octane (R+M)/2 - recommended
Unleaded regular, 87 octane (R+M)/2 - acceptable
Oil capacity 7 qt. (6.6L)
Coolant capacity 18.7 qt. (17.7L)
Chrysler Group’s 5.7-liter HEMI® Magnum V-8 Out-Muscles the Competition
All-new engine for the 21st century based on classic engine from 'muscle car' era
Dual-ignition, drive-by-wire enhance efficiency, reduce emissions while providing massive torque and horsepower
Auburn Hills, Mich. -- The HEMI rides again.
The legendary engine that powered Chrysler’s muscle cars of the 1960s has been re-engineered and reborn as a modern high-performance, fuel-efficient and durable power plant known as the all-new 5.7-liter HEMI® Magnum V-8.
Standard under the hood of 2003 Dodge Ram 2500 and 3500 pickups, the 5.7-liter HEMI churns out 345 horsepower with 375 lb.-ft of torque, giving it best-in-class power and towing capacity. The 5.7-liter HEMI also offers best-in-class acceleration and improved fuel efficiency over the 5.9-liter Magnum V-8 it replaces.
"The 5.7-liter HEMI is the finest engine of its kind in the world," said Richard Schaum, Executive Vice President - Product Development and Quality, Chrysler Group. "Not only does it make the heavy-duty Ram the best in its class for power and performance, it has flexibility that will allow us to further enhance efficiency and performance as we design powertrains for future products."
Production of the engine began in June at Chrysler’s new state-of-the-art Saltillo Engine Plant II in Saltillo, Mexico. The new facility can produce 440,000 engines a year.
The 5.7-liter HEMI’s power comes as no surprise, considering the engine’s heritage. The muscle car era truly began in 1966 when Chrysler introduced the 426 HEMI V-8, a street-legal version of the power plant that took first, second and third place at the 1964 Daytona 500. Although production of the engine stopped in 1971, it is still the subject of automotive lore.
"Development and design of the 5.7-liter HEMI presented an exciting challenge -- and a significant responsibility -- to create a new HEMI V-8 that would further enhance the Chrysler HEMI heritage," said Floyd Allen, Vice President - Powertrain Product Team for the Chrysler Group. "Big horsepower and torque numbers were a given of the HEMI architecture."
The engine’s unique two-valve hemispherical combustion chamber (which gives the engine its "HEMI" name) within an aluminum head provides impressive air flow, torque and power, and gives the engine its throaty rumble. Fifty-six pounds lighter than the 5.9-liter V-8, the 5.7-liter HEMI produces 41-percent more power and a 12-percent increase in peak torque.
"The HEMI architecture produces power that is comparable to an overhead cam engine, but is more cost-effective," Allen added.
An electronic throttle control system, Chrysler’s first drive-by-wire gasoline engine, moves the throttle in response to accelerator pedal position. The innovative throttle system is based on engine torque control, and compensates for changes in the engine load needed by the air conditioning system, compressor, alternator, power steering pump and automatic speed control.
The 5.7-liter HEMI is the first Chrysler Group engine with dual ignition - two spark plugs per cylinder. Dual ignition ensures consistent, complete and rapid combustion, without knock, that increases peak power and torque, reduces exhaust emissions and increases fuel efficiency. It even smoothes the engine’s idle. The 5.7-liter HEMI also meets all federal emissions standards and delivers an 8-10 percent improvement in fuel efficiency under typical driving conditions compared with the engine it replaces.
While currently available on heavy-duty Ram pickups, the 5.7-liter HEMI’s smaller size and simple design make it adaptable to other vehicles within Chrysler Group. It also was built with the flexibility to allow the 5.7-liter HEMI to remain competitive for years to come.
"This is an elegantly simple, powerful and efficient design," said Robert Lee, Director of Rear Wheel Drive Engine Engineering for Chrysler Group’s Powertrain Product Team. "It will allow us to fine tune and even enhance the engine’s performance and capabilities well into the future according to customer and market demand."
The 5.7-liter HEMI is built to last. It was designed, tested and developed under Chrysler Group’s rigorous reliability assurance process, building on the initiative that gave the 3.7-liter V-6 and 4.7-liter V-8 engines their proven reliability. The 3.7-liter powers the Dodge Ram pickup and the Jeep® Liberty, while the 4.7-liter is in the Jeep Grand Cherokee, Dodge Ram and Dakota pickups, and the Dodge Durango.
The 5.7-liter HEMI’s 7 year/70,000-mile powertrain warranty is backed by an impressive 11 million customer equivalent miles (CEMs) of testing, including more than 200,000 CEMs of durability testing for the average consumer - more than any other Chrysler Group engine. The battery of reliability tests closely represents real-world driving conditions, in some cases exposing the engine to more severe abuses than drivers can dish out. For example, during a 260-hour period, the 5.7-liter HEMI was repeatedly heated to 240°F and then slammed with coolant that was -25°F.
"The engine was exposed to some of the harshest testing conditions and abuses imaginable," said Donald Dees, Vice President of Quality for the Chrysler Group. "And each time it roared back."
So too, has the legend of HEMI. The new 5.7-liter HEMI Magnum V-8 is poised to write a new chapter in this classic’s history.
The HEMI® Heritage
Auburn Hills, Mich. -- The Chrysler Corporation stunned the racing world on Feb. 23, 1964, when stock cars equipped with its powerful 426 HEMI® engine swept the Daytona 500, taking first, second and third places in stock car racing's most prestigious event. The engine also set a new average speed record for the track of 154.33 mph.
While the engine’s life on the racing circuit was brief - NASCAR quickly imposed stricter engine specifications in an effort to level the playing field - that February day was enough to set the public clamoring for HEMI-style horsepower.
In 1966, Chrysler began offering a slightly tuned-down version of the 426 HEMI race engine (called the "street HEMI") as an option in Plymouth Belvederes and Dodge Coronets and Chargers. The era of the true muscle car had arrived.
The cylinder head configuration with a nearly centrally located spark plug in a hemispherically shaped combustion chamber gave the classic HEMI engine its name. This unique architecture has an inherent airflow that translates into big power.
The street HEMI came with dual, four-barrel carburetors mounted on an aluminum dual-plane intake manifold. The engine’s advertised horsepower and torque were 425 hp and 490 lb.-ft. of torque. However, many drivers claim the output was closer to 500 hp.
"Prior to 1964, we were racing on the NASCAR circuit using a 426 Max Wedge (which had a wedge-shaped head design), but we weren’t having much success," recalls Bill Weertman, Chrysler’s manager of engine design at the time. "Senior management wanted to change that. Our engineering team knew from previous experience with the HEMI design that it could produce the necessary power."
Indeed, Chrysler engineers assisted in the development of a HEMI engine that in 1965 set a new land speed record for a wheel-driven vehicle. The car, with four HEMI engines mounted in-line, set a two-way record of 409.277 mph on the Bonneville salt flats of Utah.
While for many the HEMI legacy began in the 1960s, Chrysler’s experience with the design dates back to the late 1930s, when engineers began experimenting with different types of engine designs in an effort to improve performance. During World War II Chrysler also developed a military aircraft engine equipped with a HEMI head.
In 1951, Chrysler introduced the HEMI V-8 engine to the public. The engine produced 180 hp, an impressive output in those days. The first cars to carry the new engine were the New Yorker and Saratoga lines. Between 1951-53, HEMI engines were offered on the Chrysler and Imperial, DeSoto and Dodge. Although the engines carried different names - "Firepower," "Firedome" and "Red Ram" - and were manufactured in separate facilities, they shared a similar design approach with each engine having its own size range.
The 426 HEMI had little in common with these earlier versions except for the basic valve train arrangement and spark plug location, according to Weertman.
An expensive option at the time ($600-$800 on cars that had base prices of $2,300 to $4,200), the street HEMI was popular among car enthusiasts and those cruisers who wanted to have the biggest, baddest engine on the street.
"If you were idling at a stoplight and the car next to you had ‘HEMI’ in its nameplate, there was no doubt who would be fastest off the line," said Weertman, who retired from Chrysler in 1987.
The street HEMI passed into history in 1971 as concerns about emissions and fuel consumption led to a major detuning of all high performance engines. About 10,000 426 HEMIs were manufactured for street use in the engine’s five-year run.
Still, the love affair with the original muscle car engine continues today through web sites and enthusiast magazines devoted to the HEMI. Today, restored true HEMI cars command very high price tags.
The next generation of Chrysler HEMI engines hits the road this month in the 2003 Dodge Ram 2500 and 3500 pickups. The 5.7-liter HEMI Magnum V-8 combines the power synonymous with its ancestor with the performance, fuel efficiency and durability required of today’s engines.
All data provided by DaimlerChrysler
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