I learn a long time ago that there are many different tire pressure gauges that are off, don't read the same as other gauges read differently, by as much as 3.0 lbs. between three gauges made by the same good brand gauge on the same tire at the same time
My message is use only your gauge (and never loaned it out ) and test the pressure at the track in 1.0 lb. increments to get the best 60 ft. and reaction times. Once you get close then try using 1/4 lb. changes
I haven't ran radials in a long time so what I use to used is probably not useful now I ran M/T ET Street 315x60x15 Radials, they liked 18.0 lbs. on my gauge
My old pump gas Duster weighed 3450 Lbs. with me in it and ran mid to high 1.40 60 ft. with a lot of .010 and quicker lights, occasionally going red with .49 something red lights
Test, test and test some more until your happy