A new 5.0 L engine, a significant increase in horsepower for its 8.1 L engine and a new high output version of its 3.0 L engine are among the enhancements GM Powertrain has announced for its industrial engine range for 2004.
"We continue to refine our industrial lineup," said Dave Garrett, customer engineering support manager for GM Powertrain, Pontiac, Mich. "Performance improvements, product offering, and durability are looked at every day in this business. We have been able to introduce substantial improvements for 2004 that ultimately power superior industrial products."
The new 5.0 L Vortec 5000 engine is similar to the overhead valve Vortec 5700 V-8 with the exception of bore size. Tire Vortec 5000, which has a bore and stroke of 95 x 88.40 mm, can operate on gasoline, liquid propane and natural gas and it incorporates induction hardened exhaust valve seats, hydraulic roller lifters and one piece rear seals.
The improvements for the 8.1 L, big-block V-8 Vortec 8100 engine were aimed at increased performance and durability. A new camshaft was developed to optimize performance at 1800 rpm for direct drive generator applications and offer a 25 percent improvement over the existing model. The new camshaft also provides more torque through the intended torque range up to 2800 rpm, GM said. Bore and stroke is 107.95 x 111.00 mm and maximum hp is 230 hp at 2800 rpm on natural gas.
Durability enhancements include the addition of induction hardened intake valve seats and reduced valve spring load to ensure proper valve seating for the life of the engine.
A variant of the Vortec 3000 in-line four-cylinder engine, the Vortec HO 3000 will be introduced during the 2004 model year, GM said. This overhead valve engine, with a bore x stroke of 101.60 x 91.40 mm, is rated 62 hp at 1800 rpm on CNG and is targeted toward gen-sets with outputs up to 35 kW. The increased power level is achieved through the use of new high strength pistons, a high flow cylinder head and a new camshaft profile.
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