The problem with the current accelerator pump design is air entrapment. Whoever though no leak jet is a good idea, has no idea what is actually going on inside the fuel pump chamber.
Fuel in the float bowl, being tossed around from bumps and jumps, not to mention vibration turns into a froth. The accelerator pump located below the float bowl, receives all its fuel supply from this frothy mix of air and gas, because the pump chamber is not design to expel the entrapped air pocket that naturally accumulates, a dampened pulse is produced, similar to air in the brake lines. We all know how well hydraulic brakes work with air in the lines. The stock pump chamber has one fuel outlet hole located low in the pump chambers vertical wall, air having a tendency to rise to the top of the fuel chamber, has a difficult time being expelled. The stock pump chamber actually splits the fuel outlet hole into two holes, this is another point of concern, the air pocket will eventually build to the point that it is partially expelled, now just imagine for a moment, the outlet hole is slit into two holes, the expelled air has two ways to go, one way is back to the float bowl through the leak jet orifice, no problem, the other way is right through the brass nozzle into the venturi. The brass nozzle is a fuel ONLY device not an air nozzle, belching air through this nozzle will cause a severe bog.
My thinking was to reposition a hole at the highest point in the pump chamber, this would expel the entrapped air pocket much more efficiently, than I relocated the fuel outlet hole low in the pump chamber vertical wall, insuring that is remains a fuel only port. Now every time the pump diaphragm is activated, it automatically purges the air bubble out the top hole and back to the float bowl, now the brass fuel nozzle can remain a fuel only orifice.
That is a brief overview of my fuel pump design, the pump is only one of the five improvement built into the R&D Power Bowl.
great info Dean. What are the other 4 improvements the Powerbowl will provide?