Annular boosters on a Tunnel Ram

TT5.9mag said

Has a lot to do with the combination. If you’re on the edge of detonation a little richer can help but it should start out fairly close to stoichiometric at idle and get gradually leaner under “light” acceleration. So 14.3-14.8 idle, 14.5-15.0 light accel, and go pretty rich as load and rpm increase. 12.6-13.2 or so at wot full load.

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I'd say a lot of these cars will not tolerate such lean mixes under part throttle due to cam and fuel distribution.

Also non-emissions idles will be in the 13s.

With hotted up engines, the cam overlap, high idle rpms, etc hard to say what a WBO2 will readout. Seen it jump a half an AFR between in gear and out of gear, and so forth.

That's why more than once I've posted that tune for the goal, and most of those don't need a WBO2.
One thing logged WBO2 is really nice for is seeing if the AFR is stable or drifts at the top end.