250cc engine. 10 inch diameter gasifier. Height is 30 inches of charcoal above nozzle. How long will this run under load before refill?
I too had oiled foam motocross filter in mind for gasifier air inlet. That is what I use for my mixing air filter on the MGB.
I intend to use a cyclone followed by two vertical 4 inch X 30 inch PVC cylinders in series for the main gas filter. First one filled with stainless steel scouring pads and a piece of oiled open cell foam at the top exit. The second filled with polyester batting or wool sock. I may add a final safety filter just in case someone isn’t careful with these main filters.