I think I said before, under W.O.T. you should shoot for 10.8 or so A/F ratio. This should be a pretty safe A/F ratio especially since you have no way of cooling your intake charge.
If you can get a bit closer to the 14's A/F ratio @ cruise, it will get better fuel mileage.
Under medium acceleration (no boost) you should shoot for roughly 12:s-13.s A/F ratio, 14:0 A/F ratio is too lean for medium acceleration.
You never want to be in the 14's or higher like 15 under medium acceleration in boost.
If you see your A/F ratios going lean like 14:0 or so when in boost I assume, this is too lean, I believe you should shoot for in the 10.8- 12.3 range or so when in boost, not in the 13's or 14's & definately not in the 15's
