I would debate volumetric efficiency as the reason diesels are more efficient. Turbo diesels and new diesels with egr leave more unburned exhaust in the combustion chamber. We are talking part throttle economy here. You are talking economy at 85+% load. Of course at full load the expansion ratio. It is the expansion ratio, not the compression ratio that contributes to higher efficiency b.t.w. And yes the higher btu's per lb of fuel and the unrestricted intake tract. But again...........we are talking part load efficiency here. Take a look at any 100HP diesel on the Nebraska tests and load it to only 25-50HP. The fuel efficiency will be worse than a decent 50HP gasser in the same application.
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Today's Featured Article - Identifying Tractor Smells - by Curtis Von Fange. We are continuing our series on learning to talk the language of our tractor. Since we can’t actually talk to our tractors, though some of the older sect of farmers might disagree, we use our five physical senses to observe and construe what our iron age friends are trying to tell us. We have already talked about some of the colors the unit might leave as clues to its well-being. Now we are going to use our noses to diagnose particular smells. ELECTRICAL SMELLS
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