I suggest you try tightening the air door spring one turn and see if that helps. You may have to do this a few times. We usually set our race carbs with 5 to 5 1/2 turns. You may also check to see how far the air door opens. We set ours between .850 and .915, We then jet based on how far it opens. The larger the opening the leaner the carb is.

Raul