Qjet idle rich.

[Kevin Panzino]

Also ensure the secondary blades are fully closed and the hanger allows the secondary rods to seat down in the taper. Many times when a carb is converted to "non-progressive" secondary opening, if the linkage isnt just right, the secondaries will stay cracked open, and just pull the air valve open a bit at idle, lifting the secondary rods out of the tapered seat section and it will pull fuel from the secondary tubes and be crazy rich.