Does anyone know what a good air to fuel ratio for full throttle is. I am using the GenVII with wideband O2 on a 327 revving to about 7000. I am running 14.2 at idle and was going to dial in the top end to 12.8 A/F. I don't know if that is a good starting point or too rich. The engine has fast burn heads and a comp. ratio of 11:1 and is naturally aspirated. Any help would greatly be appreciated.

 

A good starting point for NA motors would be 13.0 and gradually lean it out to 13.8. Max timing would be around 32-34 on 104 octane. Check for improvements as you lean out gradually. 12.8 is good for supercharged motors.

 

I wouldn't be afraid of more timing with a 327 and 104 gas. Did
you buy the knock module?
Remember you can adjust your timing versus map psi.