I would tune it to make you happy I like and use from 1/4 turn to 1 full turn on most of my motors with big cams idling at or under 1000 RPM, I do open the idle bleeds up to help lean the idle circuit down also I like to see from 14.5 to 15.8 AFR on my wide ban, that does make it cold blooded to start when cold but so what Lean is mean Now if I can get the part throttle near 14.0 or above I'll be good Another thing to use on tuning the idle circiut is to stand at the rear or side of the car where the exhaust exits and smell it, if it is rich you will smell it, if it is not rich it won't stink as bad, even with good smelling race gas One other last thing, if you can start the car cold and it idles right away your probally on the rich side on the idle circiut