On my turbo 4 cylinder,Multiport fuel injection car...I'd always tune for 14.7 A/F at cruise, light throttle, and 11.7-12.2 A/F @ WOT...with a wideband.
I think that seems about right. It's easier to tune yours than a
carbureted car though! I think 16+ is too high because my plugs
are bright white, and from the old days we would jet that heavier.
