Gotcha. I log every single pass but I'm very data driven. I can spend 30 seconds looking at my log when I get back to the pits and know exactly why something happened, or didn't happen, even down to prep being a variable. Seems daunting at first, but eventually it's like seeing the woman in the red dress when staring at the Matrix code
I played with tire pressure on my ET Street Rs in Michigan. Instead of lowering, I raised them and the car picked up 3mph. I was shocked it was that much.
OK, on my fuel change out I can clearly see the car ET's better after the 5:58 run. And the et got a little better as the DA dropped. So right off the bat you could say the fuel was bad. But that would be an sssumption because the fuels were not the same. New was Methanol blend and original was Ethanol. So maybe the car liked the Methanol better. But, one of my biggest concerns was the MPH was all over the place. You can clearly see in the first 4 runs the MPH was defying logic. So I would say the fuel was in fact not good. After the change out the MPH was more realistic by far.
Now on your tire pressure did you do an actual test and verify, or are you assuming. So, 3 runs at 17 PSI and 3 runs at 22 PSI and then 3 more runs at 17 PSI? Or maybe from now on you have been running 22 PSI and your MPH is consistently 3 MPH faster?
I will say this again, me running 22 PSi does NOT make my car any faster if it does not hook. And does that 22 PSI actually help the ET? Because it could be OTHER things changing your indicated MPH on the time slip. Like the car now has more rake. The Demons are notorious for this. The MPH in the quarter mile will defy logic many times. I could do 9.58 at Houston and it might be 141 MPH or it might be 138 MPH or it might be 136 MPH. Some try to say it is the PCM regulating the power on the top end. I think it is something else.
I would say that at 22 PSI my ability to hook would be VERY unreliable. In fact I am not sure if I have EVER hooked at that pressure. Maybe it is my driving style or my pressure gauge.
Logic and common sense would tell me that running higher pressure will help the whole run be faster. The 60 because the tire wraps up less and the rest of the way because of rolling resistance.
As long as the whole track is race prepped. Higher pressure could cause wheel spin on the gear shifts and even just driving down track.