Ford 6.7L 1050 ft lbs TQ at 1,600 rpm, 475 HP at 2,800 rpm

4x4ord wrote:

We own some off road but emission compliant equipment powered by Cat C13s. In our applications the engines are factory rated at 543 Hp. These engines work at over 500 hp all day long. We have a highway tractor with a C15 that produces 550 HP and is designed to produce full power and cruise at 1450 rpm. I think the C15s were available at HP ratings of up to 625 hp. When you take into account the higher rpm of the Powerstroke and compare it to a Cat engine it certainly is within reason to think it could sustain its rated power over a long pull. I wonder what the new Powerstroke will be rated at in the new F750s?

There are different emissions requirements for off road and on road engines. So it is emissions compliant, but for less restrictive off road standards. If it is like most nonroad engine from other manufacturers, it likely has a different turbo than the onroad engines.

And again, your calculations do not include air flow/boost of the turbo and how much it increases its effective displacement. You can't have the same size turbo that is on a C13 and put it on a 6.7L power stroke. Well, you probably could, but it would have a very hard time getting that thing to spool at a reasonable rpm which would make it dang near impossible to drive or tow with especially at higher elevations.