What puzzles me is if the problem is too much fuel or the falling out of the fuel due to the lack of velocity, then why is more fuel going to help this? Would making this hole larger decrease the signal (less vacuum) and thereby cause it to run leaner. I just want to understand how the modification will improve the performance of the engine. I'm alot more familiar with air bleeds, emulsion circuits and boosters in larger carburetors but a lot of the theory is the same.