Something that should be cool. Somebody tried to use the arrows from a crossbow in such a device, which speeds can be achieved?

I don't see why it shouldn't work on a larger scale if you can get the mix right; effectively it's a primitive (and not very tunable) carburettor. That kind of setup is probably going to give an over-rich mix for petrol, you'd really want something like methanol, I'd think, along with a reed valve ...

but all it is, good design, tried someone to repeat it?

Hello, I am writing through an interpreter, because I do not know English well.
I would like to know if someone tried to make the dispenser as in this video https://yadi.sk/i/aQy5KJ3Kzm68U