Hugh, I would have to believe the Nebraska tests. I think tractor companies - I know Oliver was - were trying to develop as fuel efficient gas engines as possible during the late 50's and early 60's not knowing yet that diesel would be come the fuel of choice. Also, the non direct injection engines were not as fuel efficient as direct injection. Usually gas tractors are 10 - 13 hp-hrs/gal(us). Diesels as 12-18. So a 560 Cockshutt at almost 18 hp-hrs/gal would be almost twice as efficient as a low compression gas. Also, the later IH's and others diesels did better on fuel with direct inj and higher comp. We also know that IH was a leader in Torque Rise as RPM falls - away ahead of others during this period. Here is a link to a Neb test of the 786 which show much better eff - probably higher compression??. http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2758&context=tractormuseumlit Hugh, I have always enjoyed your posts. Enjoy those IH's!! Neil
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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