I may try a spacer to allow the 50cc pump, but my hood clearance is pretty darn close, so I have been doubtful that it would still close, at least with my current air filter. I don't like running too short of a filter with a drop base since the lid gets sort of close to the top of the venturi. At the moment, I still have some hope that the 30cc pump will just be enough.
If you still have a rich dip after going to two black cams, then you might want to try decreasing the squirter size again. Now that the cam is about right sized, you may be able to see more sensitivity to that. You may be right about the PV having an effect on how quickly that extra fuel gets introduced, but I don't have any experience to draw on there.
