Dietrich

Worked on a fleet of T/A Ford L 9000S in the early to mid 70's, all were equipped with Super 250's. NH 250's were still pretty common. We had a Cummins engineer who traveled the country as a trainer. I asked him why Cummins went to all the trouble of making a new engine that had the same power as the old 250? His explanation was that Cummins wanted to develop a higher horse power naturally aspirated engine but said that as development continued, it couldn't meet evolving emission standards.