If vaporizing carburetors made a significant or dramatic difference in fuel economy, then the vehicles/engines that were made to run on propane would have shown similar/dramatic improvements in FE.
they didn't.
Yes, even after accounting for the difference in energy density/BTU's etc, they just didn't.
Could it make some difference in driveability and a slight improvement in FE if all you do is short trips?
...maybe....
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2004 VW TDI PD on bio
want to build 150 mpg diesel streamliner.
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