[Hersbird]

Originally Posted by racprops

OK I was not correct I do see slightly different numbers:

Both gasoline’s and propane’s energy density is similar at 47.2 and 46.4 megajoules per kilogram.


https://duckduckgo.com/?q=propane+vs...&t=ffab&ia=web

I was remembering gasoline against LNG which is a lot less powerful.

And even less by this chart/report;

https://afdc.energy.gov/files/u/publ...ison_chart.pdf

Propane uses heavy pressurized tanks.

Is harder to find places to refill your tanks.

Costs about the same as gasoline. MPG is also about the same.

It is a cleaner burning fuel.

As for gasoline it is in a liquid and as such highly condensed, and when used in a standard car only 20 to 30% is converted to vapor and used to power the car.

IF we convert it to 100% vapor BEFORE injecting it into a car it is reported in some many places you will receive many times the power per gallon to run your car.

A sample: https://duckduckgo.com/?q=gasoline+e...&t=ffab&ia=web

I cannot say if all of this is true.

I would like to find out, under real testing not shade tree auto rigging.

And I can see that so many systems are either very dangerous and totally unsafe to use.

I believe I know of a system that IF this is true can work safely.

Rich

Propane is easy, what you want to accomplish with gasoline the hard way. The fact that there is not MPG improvement is just proof that there is nothing to gain by pre-vaporising gasoline. I say pre-vaporising because a modern fuel injected high compression motor fully vaporizes the gasoline before it is combusted anyway. It just does it last split second in the combustion chamber. The "waste" of the ice is not in wet fuel not vaporizing, it's just in waste heat. There are many know ways to improve this with things like lean burn, but they lead to higher emissions either in gas or diesel. The EPA has decided that the emissions are worse than the extra feul used. If you did come up with a much better mpg ICE like many of these homebuilt, all you really are doing is sacrificing a ton of power and working outside of EPA regulations the real carmakers can't or if they do face millions in fines like VW. Sure a lean burn 5.2 v8 can get twice the mpg when you choke it down to probably 50 horsepower but if you just put a modern 50 horsepower 800 cc in the same pickup you would get even better mpg and it might not have NOX emissions through the roof.