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At the heart of any heavy-duty truck is its engine. The specifications for the engine typically include displacement, horsepower, and torque ratings. Most heavy-duty trucks feature diesel engines due to their superior fuel efficiency and torque output. Engine displacements for heavy-duty trucks generally range from 10 to 15 liters, providing horsepower levels that can exceed 600 HP and torque ratings often around 2000 lb-ft. This power allows for optimal performance even when hauling substantial loads.


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One of the most fascinating aspects of engine cams is their cam profile, which defines the shape and motion of the cam lobes. The cam profile directly influences how quickly and how far the valves open and close. A cam profile with a more aggressive shape will allow the valves to open wider and stay open longer, resulting in improved intake and exhaust flow at higher RPMs. This enhancement can lead to significant increases in power output.


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