AFR leaner than 12,5:1 question

[raddy]

Hi all

I would like to ask if AFR 12.5:1 with WI is really ideal target or it is possible to go even leaner with positive-power increase (and no negative-no critical EGT) effects? Im speaking about area of 13:1 to 13.5:1, with no presence of knock.

some interesting link:
http://www.myo-p.com/Dyno%20Test%20-...0Injection.pdf