GM’s Latest Heavy Duty Trucks Confirmed With 445 HP, 910 LB-FT

The General Motors Powertrain website has revealed that that the firm’s latest range of heavy duty trucks have significantly more grunt than the outgoing models.

The website briefly showed that the 2017 Chevrolet Silverado and Sierra models powered by GM’s new 6.6-liter turbodiesel V8 engine pump out 445 hp and 910 lb-ft of torque. Those figures represent a significant jump over the 397 hp and 765 lb-ft offered up by the current models and putting GM within touching distance of the 925 lb-ft torque figure of Ford’s new Super Duty line-up.

Truck Trend
says that the automaker has achieved such power and torque gains through the L5P engine’s all-new two-path intake system, helping to provide the V8 with additional air to breath. A key part of the new air intake is the fitment of a large scoop on the bonnet of the Silverado and Sierra models, providing a ram-air affect at speed.

This new scoop utilizes an air/water separator to ensure that only combustion-friendly dry air is used by the engine. Once this air has entered the combustion chamber, it funnels its way to the filter housing to create a velocity charge that results in large water droplets due to the humid air. These droplets are then flung onto the outside wall of the housing before any collected water is drained through a unique valve.


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