450ST CM2250 Help

[BTrain]

(08-16-2020 )JimT Wrote:  That engine has EGR, DPF and SCR. The 870 only has EGR. There are plenty of other internal differences, but I'm not an expert on that. For your application, farm use, you may want to consider getting rid of those systems, depending on your location and laws.

The 2250/2350/X15 all have a fuel pump that goes bad on average of 400,000 miles or equivalent engine hours. Typically you just rebuilt the pump head as a preventative measure for a few hundred $. Anyone with an hour, basic tools and a bench vise can get it done.

I have a 2012 450ST, it pulls 80,000lbs just fine, depending what gearing is in the truck. Keep the RPM over 1500, like the rest of the Cummins engines. The ST stands for Smart Torque, which gives a short term torque boost in the top 2 gears. Pretty sure it's just some software logic that is available on these newer engines. I think most people here turn that off (?). I think mine got bumped up around 525hp. I think it depends on which parts were used inside the engine. Sometimes in these newer engines the programming is all that limits it to a lower HP/Torque.

What kind of miles are on the truck? The need for an overhaul on the newer trucks is typically sooner then the older ones. Largely due to increased abuse from the emissions systems and corporate neglect for proper maintenance. These 2250s had issues with carbon packing and chewed up cams from excess soot in the oil.

Thanks Jim, it has roughly 1.2m kms but only 300,000kms on rebuilt head and some other items as well, paperwork comes with it. So in your opinion is the smart torque turned off? Would you say you have 525hp and 1850 torque? I don’t obviously want to push it to the breaking point but 500hp and 1850 torque across the entire rpm range would be better to me. Truck has 18 speed, 4.10, full lockers, super 40’s etc.