Looking for help building a Gas Vapor system

[racprops]

Originally Posted by oil pan 4

1lb of propane = about 20,000 btu
1lb of gasoline = about 20,000 btu

Tell us again how propane doesn't have enough BTUs?
I think you are just just affraid of testing it.

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

[oil pan 4]

There's abut the same difference between e10 versus e0 gasoline as there is propane versus gasoline.
Sounds like you want to go from a hypothesis straight to a finished product on the first try. Yeah it don't work like that.

[racprops]

Originally Posted by oil pan 4

There's abut the same difference between e10 versus e0 gasoline as there is propane versus gasoline.
Sounds like you want to go from a hypothesis straight to a finished product on the first try. Yeah it don't work like that.

OH I have a couple of designs.

One is said to work, but it is not something that can be manufactured and has a fixed flow rate, which means the fast you go the better the MPG get...up to a limit.

The other is my best idea, so there are a couple of starting points.

And I have a number of design notes, like when the car is turned off it just shuts off the fuel feed and the car will run until it burns off all vapor and then shut down.

And should anything fail it will automatic turn on the stock system.

And there are more ideas.

Rich

[freebeard]

The mantra that built Silicon Valley was "Fail early. Fail often".

[racprops]

Originally Posted by freebeard

The mantra that built Silicon Valley was "Fail early. Fail often".

I am a firm believer in Murphy's Laws, thus as many safe guard and plan Bs as possible.

Rich

[freebeard]

Understood. It's a recasting of 'the perfect is the enemy of the just-good-enough.

The Unix fortune cookie on Slashdot today is "When the weight of the paperwork equals the weight of the plane, the plane will fly. -- Donald Douglas"

[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.

[cRiPpLe_rOoStEr]

Originally Posted by racprops

Propane uses heavy pressurized tanks.

Is harder to find places to refill your tanks.

It's CNG that uses heavy tanks, meant to withstand higher pressures than the propane tanks. And even though it's neither appropriate or legal, I have already seen many cars converted to propane using home LPG bottles.

[Hersbird]

Originally Posted by cRiPpLe_rOoStEr

It's CNG that uses heavy tanks, meant to withstand higher pressures than the propane tanks. And even though it's neither appropriate or legal, I have already seen many cars converted to propane using home LPG bottles.

There is and RV dealer here that will fill up to 20 gallons at a time for $1/gal all summer long as well.

[aerohead]

I have a 'pamphlet' from Lindsey Publications which contains the designs for a dozen gasoline vapor carburetors, including the 'famous' 'FISH' and 'POGUE' designs.
If you have some money to totally waste, this is the chance of a lifetime to totally waste some.
Search the back of Popular Science or such for the ad.