Dodge introduces new “Hemi” engine

DaimlerChrysler has introduced the conceptual offspring of one of the automotive industries most revered engines: the “Hemi”. Displacing 5.7 litres, the new V-8 shares no components with the legendary 426 cubic inch engine last seen in 1971, and incorporates several leading edge technologies. The all-new HEMI Magnum features cross-flow aluminum cylinder heads with hemispherical combustion chambers and investment cast, steel rocker arm actuated splayed valves for high air flow; two spark plugs per cylinder for fast, efficient combustion and improved idle quality; and a new direct ignition system with high-power coils. A fully balanced, cast, nodular iron crankshaft running in cross-bolted steel main bearing caps reduces deflection and vibration for reduced noise, vibration and harshness (NVH).

“This is one of the most technologically advanced engines ever engineered by the Chrysler Group,” said Floyd Allen, Vice President, Product Powertrain Team. “Durability and power were key points for this engine, but the new 5.7-Liter HEMI Magnum has such advances as a composite integrated air fuel module and electronic throttle control. Its hemispherical head design allows the use of larger valves and provides better airflow to the combustion chambers. We were also able to reduce emissions and gain approximately an eight percent fuel efficiency improvement.”

The new 5.7-liter HEMI Magnum engine is the standard engine on the new Dodge Ram Heavy Duty, producing a class leading 345 horsepower at 5,400 rpm and 375 lb.-ft. of torque at 4,200 rpm.