Good god, I was worried up until this post.
I had recently messed with my Scangauge pro II and set it to monitor the AFR's, it reads 14.7~ after sitting idle for awhile.

 

14.7 at idle is perfect.

If you're NA ... in WOT it should be 12's to low 13's once the ECU move to OL.
HOWEVER You'll like find (depending on mods) that you'll drop below 11 in WOT.

I've also seen 14-15, yes 14-15 in WOT with someone using the Cobb AP Stage 1 map that had a MS CAI installed.

Why did you bump such an old thread?
Did you have something else to ask?