"Running on gas vapors got me 400MPG" really?....

[ELS]

Unfortunetly a real engine doesnt go by simple maths.

To the surprise of many, all engines obey the laws of physics. Where do you think my data is wrong?

A carburator has actually an advantage over fuel injection, ...

A carb has two advantages over fuel injection:
it is simple, and it is cheap. They can run well in lawn mowers at a single speed. They do not run well across a wide rpm band.

Every serious engine designer has incorporated fuel injection over carbs (includiing an old lady like NASCAR).

TF is you're problem really? Do you live just to find someone to piss off all the time?
I try to explain things in a way anyone can understand them, yet you just shut your eyes and mindlessly write something against everything I write

You know, it's no sin to agree on something for once.

[David Redszus]

A carburator has actually an advantage over fuel injection, ...

A carb has two advantages over fuel injection:
it is simple, and it is cheap. They can run well in lawn mowers at a single speed. They do not run well across a wide rpm band.

Every serious engine designer has incorporated fuel injection over carbs (includiing an old lady like NASCAR).

TF is you're problem really? Do you live just to find someone to piss off all the time?
I try to explain things in a way anyone can understand them, yet you just shut your eyes and mindlessly write something against everything I write

You know, it's no sin to agree on something for once.

My, my, do we ever have our panties in a bunch today. Well, better pissed off than pissed on.
Mindlessly? Yeah. After fifty years of fuel injection tuning, I guess it does become a no brainer.

Please. A debate based on facts is healthy. An argument based on ignorance is stupid.
Ignorance can be cured; stupid is forever.

[ELS]

Please. A debate based on facts is healthy. An argument based on ignorance is stupid.
Ignorance can be cured; stupid is forever.

Oh the irony

[1980RS]

400 MPG?

[Tuner]

Please. A debate based on facts is healthy. An argument based on ignorance is stupid.
Ignorance can be cured; stupid is forever.

It is unfortunate that when casting pearls some fall in a dark corner of the pen.

[Tartilla]

has anyone tried this and what was the dissapoitment?
I presume it could help a bit, since the fuel sprayed from a carb may not fully evaporate and certainly wont fully mix with the air.
but its obvious to me that 400mpg is not possible... so what is it really?

It's called LP-Gas, 20 to 30 mpg.

Great point LP is already gas form, and engines built for LP higher anti-knock capacity make up some lost energy as a fuel vs gasoline.

Gas/USG 120xxx BTU
Propane/USG 91xxx BTU

It's about 30+% efficient, with all the losses and radiated heat from the combustion. Harvest the heat better, and you can make it more efficient. But 400mpg...is just ludicrous. 120k BTU of energy would likely not even support the vehicle rolling and air resistance for 400miles.

A 50 - 75mpg engine...sure. Probably possible, but limited size vehicle and drag etc.

[ELS]

has anyone tried this and what was the dissapoitment?
I presume it could help a bit, since the fuel sprayed from a carb may not fully evaporate and certainly wont fully mix with the air.
but its obvious to me that 400mpg is not possible... so what is it really?

It's called LP-Gas, 20 to 30 mpg.

Great point LP is already gas form, and engines built for LP higher anti-knock capacity make up some lost energy as a fuel vs gasoline.

Gas/USG 120xxx BTU
Propane/USG 91xxx BTU

It's about 30+% efficient, with all the losses and radiated heat from the combustion. Harvest the heat better, and you can make it more efficient. But 400mpg...is just ludicrous. 120k BTU of energy would likely not even support the vehicle rolling and air resistance for 400miles.

A 50 - 75mpg engine...sure. Probably possible, but limited size vehicle and drag etc.

You can't run an engine from BTU's alone, you need an expansion medium. For gasoline this is the nitrogen left over from the air, CO2, and the most efficient of the 3 - water.

[Tom68]

OMG, add water injection to LPG then.

[David Redszus]

400 MPG?

A 1959 Opel Olympia Rekord, (3 door station wagon), modified by Shell engineers, set a fuel economy
record of 367 MPG at a test track at Wood River, IL in 1973.

That same car is now for sale for $425,000. It might take a while to break even with fuel cost savings.

And, yes it had a seat. One.

[HQM383]

400 MPG?

A 1959 Opel Olympia Rekord, (3 door station wagon), modified by Shell engineers, set a fuel economy
record of 367 MPG at a test track at Wood River, IL in 1973.

That same car is now for sale for $425,000. It might take a while to break even with fuel cost savings.

And, yes it had a seat. One.

Wasn’t too hard to find

http://www.opel-p1.nl/custom/testcar/Shell%20Opel.htm

[BLSTIC]

You don't want a variable opening injector. Modern (port) injectors have a single pintle and a spray head that has the multiple holes, all you'll achieve with a partially open injector is lower pressure across the spray head/cap (which has never achieved anything positive for spray patterns). What you want (without having a 12 pintle injector) is faster opening and closing injector for full pressure across the spray head in less time.

400mpg is technically easy. You can do it with a carbed Briggs and Stratton engine in a velomobile (enclosed recumbent tricycle). It seats one and uses the Briggs to pulse the "car" up to speed then shuts off and rolls. Average speed is low and safety is not a thing.

If you had a modern tech 50cc 4 stroke powering a series hybrid you could probably get a 2 seat city version happening. Still not gonna be safe though.

[chimpvalet]

Safer for aging parkades than a fleet of modern SUV battle tanks though!

[BLSTIC]

Absolutely. Cars around town suck for public health. Trucks, SUVs, and "trucks" are far worse.

If I were to start the system again I'd make heavy vehicle licences necessary for everything over some size and weight limit (bonus weight allowance for EVs benders of technical necessity). Not that you need a reason to own one, but more "hey your slaughtermobile is objectively more dangerous, prove you can drive it safely"