As a racer, I certainly want the best et out of my combo. Like everyone else I'm sure! To do that, I would need to go to many TnT days at the track to sort little things out and see of they were + or -. But with fuel and costs factored in (probably a minimum of about $125 each outing), and since it's simple to change the number on the window (dial-in), I don't do it.
There's no way to do it on race day as you get 1 time run. Can't make any changes from that or the dial-on gets even messier! I look back on my records from when I raced my Charger in the 80's and early 90's and I would make lots of carb/timing/staging changes each time out. Typically then it was 3-4 time runs. Not so any more!
Now I just work to make the car consistent as I really enjoy the competition aspects as much/more than every last tenth. When we won the Sportsman bracket a week ago, the car ran between 11.07 and 11.10 over the 6 rounds it took. ET's basically followed the temps (except for the one oddball of an 11.12 in there that I have no explanation for).
I'll do changes between outings but generally not the day while at the track. And if you think about it, if I really wanted to go faster, it wouldn't take many TnT events to cost more than new go-fast engine/trans parts would cost. So I'm guilty as charged - I'd buy more parts before going to the TnT to beat on the car with no competition involved! (Plus the boss understands bracket racing all too well and says the shoe polish is a MUCH better value!

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