Posted by greenbeanman in Kansas on September 23, 2009 at 12:29:08 from (69.71.122.81):
In Reply to: Re: propane tractors? posted by big jt on September 23, 2009 at 09:37:54:
Good point about the higher compression.
I rebuilt a Chevy 350 as a dual fuel engine and upped the compression to 10.5 to 1. Sure helped the LP performance since it is a higher octane fuel.
When I sold the pickup a few years later the first thing the buyer did was remove all of the LP equipment.
He sure didn't care for the pinging he got with the lower octane of gasoline and seemed to always be tinkering with the timing in order to get away from it.
Once the engine had a higher compression I got somewhat similar fuel economy on both fuels. Before better on gasoline which is proper as it has more BTUs in a gallon.
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