Mack E7 Engine History and Technical Information
The Mack e7 engine is the backbone of the almighty Mack Bulldog fleet. The history of the engine is steeped in technology, tradition and good old American gumption one would expect from Mack. The e7 mack engine was first conceptualized in 1988 by the Mack Corporation engineers and introduced in 1989. The Mack E7 Engine replaced the longstanding Mack e6 model and was produced for over 20 years. The same year Mack also introduced the CH Series for on-highway heavy duty applications. The engine is 6 cylinder, heavy duty rated and in use both for on-highway and off highway industrial applications.
Mack engines are known for their per foot pound of torque output. They are workhorses in industrial applications meaning most Mack enthusiasts measure "power to the ground" over high horsepower capabilities of other diesel engines. Comparing a 400 hp CAT to a 400 hp Mack is like comparing cats to dogs. Competitors will compare the engine strength at the flywheel whereas Mack's competitive advantage comes into play with the differentials and transmissions. This allows power down low where you need it during pulling situations. Mack engines are not built for speed unlike Cummins, CAT or Detroit but for long-term durability; perfect for service applications like Public Bus Fleets, Fire Engines, Dump Trucks and Refuse Vehicles. The Mack e7 engine's optimal running rate is at 1400-1800 rpms but isn't designed for high running rates. It is not unlikely to have a Mack Engine put 1,500,000 miles hauling full loads and not need a major overhaul. Mack E7 engines are found in mining, oil and gas, agriculture, construction, pumps and compressors and power generation.
Most machine shops can typically can remanufacture an existing core or rebuild and return an engine in approximately 16 days.