Hello again. A friend of mine has a service truck with a mechanical 8.3 Cummins mated to an allison automatic. I am guessing it weighs about 15-18,000lbs. It governs out at about 65 mph. I am almost positive it has the p7100 pump. How is the best way to go about giving it more power. Would you recommend sliding the fuel plate (forward I think), grinding on the fuel plate, buying a fuel plate, or some other means? Would a fuel plate work from a 5.9 cummins, probably not? I am guessing the factory hp is on the low end, maybe 225, and I can check. He wants to keep it simple, and I don't think he will need a pyrometer as it is an automatic, doesn't pull trailers, and doesn't want to bomb it. Thanks for the advice. Eddie

 

this thread would probably work for you better in the big rig section