When he states he removed the air filter for less restriction I was expecting

[Qikbbstang]

there was going to be a backfire,  explosion and fire in short order.

https://www.youtube.com/watch?v=58IkmPK6ikc

[fe66comet]

Pretty interesting, I wonder if it could be done in a practically or with alcohol?

[Heo]

  200 M.P.G Yeea right
What he have done is converted it to use
the same system as a Model T updraft carb,
That suck vapor from a gas pudle.
I bet you can get it running on gas vapor.....
and real good if you get the vapor to consist
of about 13 to 1 mix of air and gas
like a normal carb does. But where the fuel
saving comes from i cant imagine

[fe66comet]

Kerosene evaporative engines start on gasoline then switch to a mist of kerosene in regular operation.the evaporator used a thermal plate to turn the fuel to a vapor. A farm tractor could run twice the distance on the same load with a system like that. The issue was gas became cheaper than kerosene so the systems were no longer a feasible option. It does work just it is not practicle for the average person to operate or maintain. The future really lies in hydrogen power in my opinion.