Carb tuning, larger accelerator pump nozzle?

Actually IIRC the graph that illustrates thie relationship best is in Obert.
Very funny Geoff that you have now come around to espousing those old books by automotive engineers that you previously dissed as outdated.

Got to say this whole dead thread revival has been entertaining. Dano got his carb figured out months ago and 12many got his question answered a page back. One of the things that was understood in the era of carburation was the importance of introducing the air correctly. That's really what we covered in this thread.