The ideal A/F ratio is the one that makes the most power, either on the dyno, or at the drag strip (MPH)...........It can be anywhere from 10.9 to 1 to somewhere in the mid 13's.........and it all boils down to fuel fall out.......How good the fuel distribution of the intake is and how fast the air speed is through the port........

What's your motor build up??? What heads?