6.7 Cummins vs 6.6 Duramax
As someone who knows next to nothing about Diesel engines, I am trying to figure out the strengths and weaknesses of these to. Any opinions would be appreciated.
Forum Discussion
ShinerBock wrote:4x4ord wrote:
This bit about natuaral torque coming from a longer stroke is bs. If the displacement remains the same that longer stroke is going to dictate a smaller bore. Torque is a reflection of the amount of heat energy released from the fuel during a power stroke. So it is a function of cylinder volume and volumetric efficiency.
Edit: besides the above the Powerstroke has a longer stroke than the Cummins...... does this mean the Powerstroke pulls like a freight train compared to a Cummins.:)
Torque = force x distance. Longer stroke = longer distance. If two engines are generating the same force to the top of that piston, but one has longer rod turning the crank, then it will have more torque.
Also, the 4.88 inch stroke of the Cummins is much longer than the 4.25 inches of the Powerstroke, and both are longer than the 4.06 inches of the Duramax.
Correction, the Duramax has a 3.89 inch stroke, not a 4.06 inch stroke.
