Looking for help building a Gas Vapor system

[teoman]

1L of LPG is 0.51kg
1L of gasoline is 0.75kg

They both are 46.4MJ /kg.

[teoman]

Originally Posted by racprops

Sorry high pressure and high temps will not work on a stock car... might as well convert to a electric motor...

I am talking about a stand alone add on vapor system, one that will work on say 5 PSI and deliver pure vapor to the engine heated by electric heaters on demand, and will not hold any vapor. The gas is flash vaporize as needed.

That is what i was getting at, you heat a tiny amount of fuel, and with the injector once you inject it, it will flash vaporize.

If you keep the heat long enough, you can split the molecular chains ending up with a gas that does not go back to liquid once it cools down.

[racprops]

Originally Posted by teoman

Not with vapor but with mixed fuel they had already done that and were claiming %50 efficiency.

Not sure what your saying...they MIXED gasoline WITH Diesel and got better mileage??

Rich

[tf4624]

thats a no no lol

[teoman]

Dual fuel system, using both at the same time. Independent injectors if i remember correctly.

[racprops]

Originally Posted by teoman

Dual fuel system, using both at the same time. Independent injectors if i remember correctly.

OK BUT I am looking a normal gas injector system AND a vapor system and considering using diesel as the fuel for the vapor.

I read somewhere that diesel made better vapor and with less junk and with lower temps to convert it to 100% vapor, but at the time I considered it out of the question and did not look into it.

Now a dual tank for each system is looking better.

So trying to find out about diesel again.

Rich

[oil pan 4]

Originally Posted by racprops

OK so why does a gasoline motor lose so much HP on Propane??

AND MPG as well??

All engineering calculations are done in units of mass. Don't get hung up on volume.
For get about MPG and worry about pounds of fuel per mile.

Horsepower should be irrelevant if you are going for maximum fuel economy.

[racprops]

At this point they seem about equal:

As of 2010, the density of petroleum diesel is about 0.832 kg/L (6.943 lb/US gal), about 11.6% more than ethanol-free petrol (gasoline), which has a density of about 0.745 kg/L (6.217 lb/US gal). About 86.1% of the fuel mass is carbon, and when burned, it offers a net heating value of 43.1 MJ/kg as opposed to 43.2 MJ/kg for gasoline. However, due to the higher density, diesel offers a higher volumetric energy density at 35.86 MJ/L (128,700 BTU/US gal) vs. 32.18 MJ/L (115,500 BTU/US gal) for gasoline, some 11% higher, which should be considered when comparing the fuel efficiency by volume. The CO2 emissions from diesel are 73.25 g/MJ, just slightly lower than for gasoline at 73.38 g/MJ.[23] Diesel is generally simpler to refine from petroleum than gasoline, and contains hydrocarbons having a boiling point in the range of 180–360 °C (360–680 °F). The price of diesel traditionally rises during colder months as demand for heating oil rises, which is refined in much the same way. Because of recent changes in fuel quality regulations, additional refining is required to remove sulfur, which contributes to a sometimes higher cost. In many parts of the United States and throughout the United Kingdom and Australia,[24] diesel may be priced higher than petrol.

And:

Diesel engines are lean burn engines,[31] burning the fuel in more air than is needed for the chemical reaction. They thus use less fuel than rich burn spark ignition engines which use a stoichiometric air-fuel ratio (just enough air to react with the fuel). As Professor Harvey of the University of Toronto notes, "due to the absence of throttling [constant amount of air admitted, per unit fuel, with no user-determined variation], and the high compression ratio and lean fuel mixture, diesel engines are substantially more efficient than spark-ignited engines", generally; Harvey cites the side-by-side comparisons of Schipper et al. and the estimates of >20% lower fuel use and (given differences in energy content between fuel types) >15% lower energy use.[32] Gas turbine and some other types of internal combustion engines, and external combustion engine, both can also be designed to take diesel fuel.

and more:

Chemical composition
Diesel does not mix with water.

Petroleum-derived diesel is composed of about 75% saturated hydrocarbons (primarily paraffins including n, iso, and cycloparaffins), and 25% aromatic hydrocarbons (including naphthalenes and alkylbenzenes).[54] The average chemical formula for common diesel fuel is C12H23, ranging approximately from C10H20 to C15H28.[55]
Chemical properties
Further information: Diesel exhaust and Gel point (petroleum)

Most diesel fuels freeze at common winter temperatures, while the temperatures greatly vary.[56] Petrodiesel typically freezes around temperatures of −8.1 °C (17.5 °F), whereas biodiesel freezes between temperatures of 2° to 15 °C (35° to 60 °F).[56] The viscosity of diesel noticeably increases as the temperature decreases, changing it into a gel at temperatures of −19 °C (−2.2 °F) to −15 °C (5 °F), that cannot flow in fuel systems. Conventional diesel fuels vaporise at temperatures between 149 °C and 371 °C.

Conventional diesel flash points vary between 52 and 96 °C, which makes it safer than petrol and unsuitable for spark-ignition engines.[57] Unlike petrol, the flash point of a diesel fuel has no relation to its performance in an engine nor to its auto ignition qualities.

BUT I cannot find the temp needed to convert it to 100% vapor and rater diesel has much less additives.

Rich

[racprops]

Originally Posted by oil pan 4

All engineering calculations are done in units of mass. Don't get hung up on volume.
For get about MPG and worry about pounds of fuel per mile.

Horsepower should be irrelevant if you are going for maximum fuel economy.

OK My gauges read GPH..so at idle my car uses around .50 GPH, at speed it is pulling around 3 GPH...

IF I can get it to only use the .50 GPH at speed...

[oil pan 4]

That's increasing fuel efficiency by 6 times.
Even if you went all electric you would at least double efficiency, possibly increase energy efficiency up to 3 times or maybe even 4 times the original.
I think increasing fuel efficiency of the original engine and vehicle by 50% to doubling it would be more reasonable.