autoevolution
 

L5P Duramax Diesel Output Leaked: 445 Horsepower, 910 Lb-Ft of Torque

In the world of three-quarter and one-ton pickup trucks, torque is the name of the game. For the model year 2017, the Chevrolet Silverado HD and its GMC-branded counterpart are good for 445 horsepower at 2,800 rpm and 910 lb-ft (1,234 Nm) at 1,600 rpm, all thanks to a revised version of the 6.6-liter Duramax V8 diesel mill.
LP5 Duramax Diesel output 14 photos
Photo: TruckTrend / GM Powertrain
2017 L5P Duramax Diesel specifications2017 L5P Duramax Diesel specifications2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 Chevrolet Silverado 2500 HD2017 GMC Sierra Denali 2500 HD with 6.6 Duramax Diesel V82017 GMC Sierra Denali 2500 HD with 6.6 Duramax Diesel V82017 GMC Sierra Denali 2500 HD with 6.6 Duramax Diesel V8
Internally referred to as LP5, the model year 2017 Duramax V8 is a lot more muscly than the model year 2016 powerplant, which offers 397 horsepower at 3,000 rpm and 765 lb-ft (1,037 Nm) at 1,600 rpm. As discovered by TruckTrend, the 2017 Chevrolet Silverado HD and 2017 GMC Sierra HD with the 6.6-liter Duramax V8 have caught up to the 2017 Ford Super Duty’s 6.7-liter Power Stroke V8. The Ford engine is 5 HP down on the GM unit, yet the Power Stroke edges ahead in terms of torque (15 lb-ft / 20 Nm more).

Curiously enough, Ram Truck’s website for the 3500 heavy-duty model lineup still reads “best-in-class diesel torque 900 lb-ft (1,220 Nm)” for the Cummins-developed 6.7-liter turbo diesel inline-six, despite the fact FoMoCo is the new king of the hill and General Motors is second best. A major update for Ram’s HD range is programmed for 2018, one year after the Ram 1500 gets reborn.

As per the leaked information via GM Powertrain, the L5P Duramax V8 is an OHV unit with a bore stroke of 103 x 99 and a compression ratio of 16.0:1. In other words, the B20-Diesel compatible mill hasn’t changed too much from a technical point of view. What has changed, though, is the intake system.

Without regard to the functional hood scoop adorning the Chevrolet Silverado HD and GMC Sierra HD, which provides 60 percent of the air needed by the Duramax engine, General Motors made it official that “the air filter housing also draws 40 percent additional air from a dry location in one of the front fenders.” In other words, the improved Duramax V8 needs lots of air.
If you liked the article, please follow us:  Google News icon Google News Youtube Instagram X (Twitter)
About the author: Mircea Panait
Mircea Panait profile photo

After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well.
Full profile

 

Would you like AUTOEVOLUTION to send you notifications?

You will only receive our top stories