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The problem with propane is that it has FAR fewer BTU/unit than diesel fuel (approx. 60% as much), and it uses oxygen that would otherwise combine with diesel and produce more heat (energy.) In a turbocharged engine oxygen availability isn't an issue, and what propane does there is cause almost all the injected diesel fuel to burn. Typically only about 80-85% of the diesel fuel injected burns, propane injection pushes that to 95% or better.
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Phil
1988 F350, NA 7.3l, 5-speed, crew cab, 4.10 SRW. Miles: over 450K. Being taken off the road within the next month or so to deal with advanced rust. May just do a resto/rebuild to better my bodywork & paint skills.
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