do some research or read a book please before you post mis-information.
I recommend “how to tune and modify engine management systems”
that is all.
*after re-reading your post i see you put to mid 13’s,
13.5ish-14.5 is where you should be under load on a stock KA, at WOT the a/fs should dif slightly richer and then come back leaner as the o2 feeds back info to the computer.
Low load should be 15.1-mid 16’s. perhaps higher, i’ve seen sr’s as high as 17:1 under low load/rpm.