Best AFR for consistency

The guys I race with generally go on the lean side, in their experience the leaner side of the range tends not to "chase the air" as much as carbs running on the rich side, and yields a narrower range of times. Several of them dial based on measured weather changes, a few have their own weather stations and at least one takes real time readings which are then displayed on a screen along with predicted E.T. to dial.

I installed an a/f gauge in my car years ago, tuning has aimed at high-12s at WOT and I haven't changed jets in several years in either my TQ or Mighty Demon. When we raced in Denver back in 2014 I drove the car there with the TQ as it would have been easy to lean it out driving up in altitude if needed. Approaching via I76 I saw the a/f ratio get richer but it wasn't a significant change that day. Home track is at 950' altitude.

I race in Sportsman class with a limit of 12.0 in the quarter mile, 7.50 in the eighth, I know racers who tune to get as close as possible to those numbers to have a better chance of surviving dual red light launches. Other than those going to the lean side of tuning I don't know of any particular tricks they use to stay consistent. The nature of tricks, I suppose!

Have recently taken steps toward data recording my A/F numbers. Hoping to find a relationship between performance and whatever level of detail I can get from the electronics. Dialing based on weather seems pretty linear, at least the most common tool racers use to predict the next round's run, based on past performance.