Especially if the air in the tire contains water (not nitrogen filled) you can gain about 2PSI a pass for the first 2-3 passes.
I don't run less than 20PSI in a pickup. I have driven lower, and do not consider it safe in a heavy truck.
Thanks Pat, I knew you'd have an answer. Anything past this is not directed at you, you understand. I'm just trying to keep something important from getting clouded with speculation. So many times threads go that way.
I've been at the track & have yet to see anybody get out after a burnout & check. Check pressure before staging lanes, then burnout & then make a pass then check...yes. BUT you get a small increase on the track & from the track depending on surface temperature.
That's what my 33 + years in the sport taught me also
Maybe I was not the best driver but 2 psi? I never really felt a difference on the big end BUT we could measure performance gains in our 60's from that. I don't remember EVER radioing back & saying if you don't get 2 more psi in it I'm gonna wad it up.
I agree with you on the heavy truck psi for sure