if you take the nose off the bottom of the plate, you will be pouring the fuel in at low RPM's.
go above the protrusion and take out some meat there. the more rise you give your notch the slower it will fuel as RPM's come up. if you take a huge hole out with very little upward slope, you bring on fuel faster and at lower RPM's. the deeper you go into the plate the more fuel. dont go over 12MM deep or your plate wont stop the rack at all.