carb tuning for running the dial in?

just curious to see what methods some of you other bracket racers use for tuning your carb to run consistent ET's?

I have always been from the camp that runs the carb a litttle lean. my thinking has always been that when the lower DA of evening time comes that the carb that is already starving for fuel is not going to pick up much. better air, but not enough gas to take advantage and speed up a lot.

however, I took the new car to its first bracket race the other day and was just a tad to the rich side. my EGT was showing 1245 degrees. instead of me leaning it to around my usual 1375 degrees I let it be. the car ran three 6.87's flat out, and a 6.882 just stabbing the brakes at the finish line. it did this over a 5 hour period. the DA had went up and came back down a total of 500 feet over this time. not a lot but enough to make a car move.

just wonder now if it would have all of a sudden picked up 2 or 3 out of the blue when the sun went down. didn't make it that far because of a red light, but have wondered ever since.

any feed back?