5 votes



I haven't tried this, so you are on your

Red Neck


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It does work

Though I doubt a lawn mower on a vapor tank could cut much grass, it will idle. A car engine will too, provided its an older style, pre direct cylinder fuel injection. The newer computers don't work as well with pre vaporized fuel.

The fuel system of any engine is basically a high velocity vaporizer (inefficient by design, IMO).
In the late 70's, when fuel prices skyrocketed, relatively, there were cars that got 60 MPH highway mileage (it really did get that). 40 years later, there are computer controlled, direct injected, hybrid gas/electric cars that sport 50 MPG.

I really doubt a truck on a vapor canister only would get out of it's own way, but a different vaporizer design is always worth a look. If it could be used to increase the efficiency a little, it might be worth it.

Just open the box and see

Cyril's picture



These sparsely distributed folks toying around with these ideas deserve it, imo.

"Cyril" pronounced "see real". I code stuff.


"To study and not think is a waste. To think and not study is dangerous." -- Confucius

Cyril's picture

This isn't new seemingly

This is legit experimenting by various individuals who got interested in it anew in the 90s, although it was known to work (somehow) as early as the 30s, so that doesn't seem to be anything really new.

You can even find specialized websites and forums about it :


I don't think it's so much about a big conspiracy from car manufacturers or the oil industry to hide it as much as, likely, still a lack of enough data and/or engineering on the performance one can hope for with it - e.g., what happens to the torque power, also? etc. Notice they do it with today's engines' design, which, in the basic principles, came long ago to do the mix air + gas AFTER the air intake + cleanup, and in a controlled chamber environment, not outside. That's distinct basic assumptions and design choices, to begin with, and one has to keep that in mind, not to compare apples to oranges.

But I might be wrong just as well, also (re: the conspiracy)

Engines running with it do sound to be forced to be lower in their RPMs, anyway, which certainly also contributes to lower significantly the gas consumption, btw - at the expense of the torque power, for instance, etc.

It's all about tradeoffs when you have to deal with the laws of thermodynamics, you know! ;)

So, imo, it's also very possible that it hasn't been studied enough (for whatever reasons) and/or got enough investment efforts to industrialize it.

But, better late than never, after all. Thank you again WWW ;)

"Cyril" pronounced "see real". I code stuff.


"To study and not think is a waste. To think and not study is dangerous." -- Confucius