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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