Cummins announces 600-hp rating

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Cummins announced its 2007 heavy-duty engines will be available in several new ratings, including a 600-hp rating for its ISX model. The company also showed off three heavy- and medium-duty diesel engine installations featuring its 2007 emissions technology in a Tuesday, March 21 press event preceding the 2006 Mid-America Trucking Show.

The company will use optimized exhaust gas recirculation to meet a 50 percent reduction in oxides of nitrogen and a diesel particulate filter (DPF) to meet a 90 percent reduction in diesel particulate matter or soot. After 200,000 miles the DPF will require maintenance to remove ash, and Cummins showed off the machine that dealers and large fleets will use for that job.

Despite the emission changes, Cummins said a full lineup of ratings will be available for the ’07 ISX and ISM, including three new ratings for the 2007 ISX: the ISX 425 SmartTorque, the ISX 485 SmartTorque and the ISX 600.

The ISX 425 SmartTorque, designed for truckload fleets, provides extra torque in the top two gears. In lower gears it provides 1,550 lb-ft of torque, but in higher gears the engine offers more torque – 1,750 lb-ft – which allows drivers to stay in top gear longer, maintain road speed and shift less often on grades. This also saves fuel economy, the company says. The ISX 485 rating operates the same way and is designed for the premium truckload market.

The ISX 600 is designed for heavy-haul applications and owner-operators and features 1,850 lb-ft of torque. The ISX and ISM for 2007 will be available in limited production in fourth-quarter 2006, with full production beginning in January.