You can step up to 290-300 injectors only if you turn up ur fuel pressure. While i love the 6cta 8. 3 motor, i would suggest that anyone who is interested stick with the nhc-250-powered. · i have m816 with the trusty 250 cummins. · track active storms heres the latest advisory from the national hurricane center as of 8 a. m. How can i find out how old this is and when it was made? · be ready for hurricane season. Make sure you have multiple ways of receiving forecasts and alerts, and know what to do before, during, and after a storm. · a disturbance is expected to stall late this week over florida and currently has a low chance for tropical or subtropical development. You add more stress on the camshaft when you turn up the rail pressure. They did make small cams in the 400hp range though. Take action today to be better prepared for when the worst happens. Understand your risk from hurricanes, and begin pre-season preparations now. Switch to a #15 or 17 plunger/fuel button. · the nhc 250 does not have piston coolers, so you will not be able to run it hard. · nhc250 valve injector overhead adjusting many of my fellow haspin rally attendees know that my m818 was quite smokey and running a little rough. May the forum gods have mercy on me, searching on tapatalk is a pita! I got the new o-rings but i need to know the torque specs for the injectors. · cons – parts availability, starts better than the nhc-250 in cold weather but still needs a sniff of ether ive had both nhc-250-powered trucks (m929a1, m928a1, m932) and 6cta 8. 3-powered trucks (m936a2, m932a2 and now two m925a2s). · does anyone have the actual cummins service manual for the nhc 250, not the tm. I got all of them off except 1. · nhc active tropical cyclonesnhc active tropical cyclones What is the national hurricane center tracking in the tropics? · if you swap over to a civilian nhc-250 alternator mount (cheap at truck salvage yard), which will likely be a j-180 short (4 between double ears), it should also give you a lot more options for lower cost and more reliable civilian stuff. I have a few bad injector o-rings since i am getting fuel into the oil. · i am in the process of replacing all the belts on my 5 ton with a cummins nhc 250 engine. · hey, what are the recommended parts / tips / tricks when removing, cleaning, and re-installing the clogged fuel injectors on an nhc-250? I have the manuals on cd and all i can find is torque specs for the heads then the rocker arm towers. . · on idaho motor pools web site (where i have been shopping, cause its close to my place) it says nhc 250 cummins on all the 5-ton trucks (dump trucks, tractor rigs, and wreckers), all the listings for the m35a2s just say turbo diesel. So, after killing lots of bugs and sending a few prius drivers in the other direction, i decided it was time to address the problem. Any guidance/tips from those who have done it would be greatly appreciated! The belt from the crank to the waterpump has no adjustment and i cant figure out how this comes off/on. · my 5 ton m927 has a cummins engine serial: