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Re: Natural Gas E-250
To the best of my knowledge, the cars here in CA that are equipped for NPG and LPG are identical shortblocks. Heads, compression ratios, cams, etc. Some of them have the same intakes, its just that the fuel system and engine management systems are different.
Evil Result, although you're right about propane having different octane, there is some other property about its combustion (golly I'm racking my brain here) that makes it require about the same compression as gasoline. Anyone chime in? I'll bet SaabJohann knows...
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