[solarguy]

If there were huge, or even moderate gains available by heating the fuel so it would vaporize better, then converting a gasoline engine to run on propane would absolutely show those gains. Propane is as vaporized as a fuel can get. Fuel economy generally does not improve when you perform such a conversion. The exception is if you have an inefficient gasoline fuel delivery system to start with, like dirty injectors, then propane shows some modest gains.

The above discussion refers to gallons of gasoline equivalent propane use, i.e., they accounted for the fact that propane is less energy dense, even in the liquid form.

To me, that says there is not much to gain from heating liquid fuels.

Finest regards,

troy