The part-throttle was rich on all of them, not lean, and really out of normal range in at least one case.
And not just a little rich either........some were way way rich with light loads simulating highway driving.
Under those conditions, the main circuit is already flowing plenty of fuel,........and you're not going to lean out the mixture by 3.5 points by tweaking an air bleed.
All the carbs had a tendency to richen up throughout the run(both the turbines and O2 agreed).......some worse than others.
