fuel supply question

[struckinc]

i was curious if my thinking is on the right track. i am upgrading my ka fuel system with sr (370cc) injectors. i am also changing to the walbro 255 fuel pump. my question was instead of changing the tune in the ecu if i raise the fuel pressure and my stock tune keeps firing the injectors at stock duty cycle then i should be able to compensate for the extra fuel i need to keep the afr where it needs to be, correct? and where do yall think the air/fuel ratio should be on a medium built na/ka? i was thinking timing around 14 deg and afr around 12.5-13:1. does that sound about right?