Torque rating for 8.3 Cummins

The Cummins 6CTA specs at sea level.


RPM: 800 1000 1200 1400 1600 1800
H.P.: 76 - 136 - 201 - 230 - 248 - 255
Ft #: 499- 713- 880- 863- 813- 745

But the Cummins C8.3 diesel engines are available up to 350 horsepower with 1050 lb.-ft of torque. It depends on how they were rated, or spec'ed when ordered.

It depends on the specific model of the 8.3 engine.

6C8.3 is Naturally aspirated
6CT8.3 is Turbocharged
6CTA8.3 is Aftercooled
C8.3 is Charge air cooled (intercooled).

I would much prefer the C8.3 to the later ISC or ISL. In my opinion, the newer engines have a major flaw - a computer controlled fuel system that like to throw out all kinds of codes. They run great without the computer and are easy to work on. Plus they get better fuel mileage than the computer operated engines. But it is no speed demon going down the highway or climbing hills. But she sure is a good dependable engine without that new fangled computer stuff. The non-computerized 8.3 engine will get you there and back as well and better than the newer ISC and will do it using less fuel.

Thanks for the info, I'll check the plate.

Actually there's a plate on the drivers side of the timing cover that gives the eng s/n, HP and Torque ratings among other things. It's a black and silver metal label that's mounted vertically.

With the engine serial number, call Cummins tomorrow: 800 343-7357.

With the VIN perhaps that can be looked up.

If its rated at 300HP...its 850. The 330 HP versions are rated at 950 and the 350 HP versions are rated at 1050

It will be about 850 I suspect - or at least that's what my buddy's 2000 8.3 is.