Following Sammy's lead, I am doing this with a PLX AF controller. Have the narrow band output going to the inner core wire on the green wire leading to the lambda brain. I have idle right at 14.7 and am at 12.8 - 13.2 or so WOT. When I let off the gas I get the typical exhaust popping and AF in the 17-19 range. Don't know what, if any impact that has. Car fires up and idles very well even on 0 degree days
I have my advance set to 33-35 degrees at 6K RPM's, which I believe translate to the 7-10 degrees at idle mentioned above. I always run at least 91 octane.