I knew an inventor in Pheonix who built just such a mechanical vaporizer,
which markedly improved mileage and performance. Just a metal tube divided
into about six sections with a turbine blade in each. All on a central
shaft, driven by a fan belt. The gas laid in the bottom and was wipped into
a vapor which migrated progressively through a hole in the top of each
partition, before being sucked into the carb. His lab was emptied by a
semi-trailer and he disappeared.
Another angle. Water and gas can be mixed into a stable emulsion when
placed between thinly spaced (high power) ultrasonic transducers. It
explodes violently upon ignition.
The above information is to be used only at your own risk.
Peter Nielsen