[BLSTIC]

Thread Revival!

Looking at this thing, it functions purely as a vaporisation aid. The restrictor part of it has nothing positive for economy and is an all-round negative, but necessary for the product to work

What it does is that via the restriction it creates massive airspeed, this would tend to rip apart any droplets of fuel as they accelerate (and elongate) with the air to go through the tiny holes. On the other side, once through, you would get huge turbulence as the now super-high-speed air mixes with air that is hardly moving (being hidden behind the plate and not the holes), this further breaks down and evaporates the fuel. This turbulent zone would not last long (because of the small spacing between the holes) and you would then have uniform airflow with much more vaporized fuel than earlier. You will probably also have a more uniform spread of rich/lean areas because that's the nature of restrictions, some air flows to the next restriction rather than through the first one. It's why air cleaners that have some tiny restriction can improve airflow through carbs by making it uniform.

However I would say that the effect is to improve the horrible vaporisation of, say, webbers, rather than an all-encompassing magic carb gadget. I would doubt its ability to improve, say, an SU that had been modified for improved fuel shear or anything with a stepped annular discharge booster venturi on a small diameter primary venturi (both situations already have ultra-high airspeed and good distribution at the fuel discharge point, and both have been noted to generate a 'fog' rather than any visible droplets)