[camcojb]

Air/fuel ratio? If you're talking about idle a/f, most of my large roller cam EFI setups liked low to mid 13's a/f at idle, very unhappy trying to lean them out to 14.7:1 like a milder combo would use. I just give them what they want, in my case the richer a/f at idle made more vacuum and the engine was a lot happier sounding. Don't get hung up on making them lean out to a certain number.