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Big power increase for Chevie diesel
Engine output for Chevy Silverado HD and GMC Sierra HD increased to 360 horsepower and a class-leading 650 lb-ft of torque. (New Ford is 325 HP with 570 ft. pounds of torque and New hi output model Dodge Cummins is 305 HP with 610 ft. pounds of torque. All tremendously powerful mills!)
Significant updates result in smoother, more refined operation, as well as reduced emissions New glow-plugs reduce start time by as much as 50 percent.
PONTIAC , MICH. - Later this year, GM Powertrain will introduce a new 6.6L Duramax 6600 turbodiesel V-8 (RPO LBZ) for the 2006 model year Chevy Silverado HD and GMC Sierra HD with class-leading horsepower - 360 (268 kw) at 3200 rpm and class-leading torque, at 650 lb.-ft. (881 Nm) at 1600 rpm. In addition to the power increase in the Silverado and Sierra, all 2006 Duramax engines have been significantly revised to deliver lower emissions and significantly improved quietness and smoothness in every application.
The 2006 Silverado HD and Sierra HD with the Allison 6-speed automatic transmission will be equipped with a significantly revised 310 horsepower Duramax 6600 (LLY) through the third quarter of 2005. It will be replaced in these applications in the fourth quarter of 2005, by the higher output, 360-horsepower Duramax (LBZ).
"The introduction of the Duramax diesel in 2001 represented a significant evolution in North American diesel pick-up truck market and propelled GM's heavy duty diesel pick-up truck market share to over 25 percentage points," said Charles Freese, GM Powertrain executive director, diesel engineering. "The introduction of the improved, 2006 Duramax turbo diesel once again sets a new benchmark to which all others will be measured."
The Duramax 6600's horsepower and torque increase and emissions reduction are enabled by a strengthened iron cylinder block and a lower compression ratio. The lower compression reduces stress on the engine by reducing the peak cylinder firing pressure. This, in turn, allows more fuel to be burned - more fuel means more power - while the lower compression helps reduce NOx emissions. Lower compression also helps reduce noise and vibration, making the all variants of the 6600 a quieter and smoother engine.
A revised variable-geometry turbocharger also enhances the driving experience of the Duramax
1- 2004 Chevy Taho pulling a 5,000 TT. Pulled a local 7% grade at 37mph tops.
2- 2005 Dodge Ram Cummins pulled this same trailer at 74mph up the same grade.
Comparison #2:
1- 2004 Chevy Taho pulling the same trailer averaged 8-10 mpg.
2- 2005 Dodge Ran pulling the same trailer averaged 11-14 mpg.
Comparison #3:
1- 2004 Chevy Taho non-towing gas mileage was 14-18
2- 2005 Dodge Cummins non-towing mileage was 16-21
Last edited by skytop; 08-02-2005 at 03:41 PM.
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