Idle Mixture has very little to do with best power.
Totally different circuits.
You should have left the idle screws where they were when you were at 14.6 or maybe as low as 14.2 on the idle air fuel ratio.
Easiest way to the the proper air/fuel settings on the center carb is to send the center carb to Dick Boneske (who does a LOT of work on Tri-Power set-ups) and have him set it up for best power and mid range.
If you do not understand the given circuits and how to manage them PROPERLY you are wasting your time. He could also send you jets for the front and rear car for the max power parts of the HP curve.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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