Posted by Janicholson on August 03, 2020 at 16:58:11 from (24.240.46.228):
In Reply to: Gas vs diesel vs LP posted by Chris NW Ind on August 03, 2020 at 16:37:51:
Diesel fuel=139,000BTUs/gallon Gasoline !124,000BTUs/gallon Propane 91330/gallon. Diesel engines have higher compression ratios, and when burning without over fueling in an efficient engine, are the most efficient (not considering fuel costs) Gasoline, though less BTUs, and less compression, and when just below the spark knock threshold in timing, can produce more horse power/cubic inch. (many will argue, but this is not racing.) The propane is at a BTU disadvantage, but can stand a much higher compression ratio than gasoline. When fueled correctly they can be as powerful as gasoline, but much more thursty and considering fuel costs, they come out comparable. This is a generalization, and not going to fit everyone's opinion. Note the diesel in the 450 has less compression than more modern Driect injection style. The gas 450 was designed around what fuel would now be considered 80 or less octane (R+M method) And the propane engine if equipped with an IH propane head, probably still could use a bit of compression. Jim
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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