In the Cummins the M11 and 855 came before the ISX/ISM engines. Even tho the sizes are similar that's about the only thing that is. The ISX is all new with dual overhead cams and a single head. They are a more complex engine but have proven themselves to be as good or better than the older engines, altho less easy for a novice to work on. My old truck had an ISX set at 435 hp from the factory. I had a diesel guy turn it up to about 600 hp at one point, but had to turn it back down to 550 hp because it would heat up since I hadn't changed the turbo and injectors. When I sold it it had just less than 1 million miles and used no oil and had no major work done. It did need a turbo at the time tho which was $3500.00 from Cummins, but about $1750.00 aftermarket.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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