Holley 650 ultra double pumper

Yup......well, it can't bog and blow black smoke too. Bogging = lean; Black smoke = rich. Now if you set there and snap the throttle open and closed when the car is running in "Park", you WILL see black smoke from those big ol' accelerator pumps doing their thing, but that's just what's gonna happen. That's not a real world driving condition, revving it while it's sitting there.