Results vary, but I start with 34psi cold, with a target of 41psi hot..
..which I verify and tweak each track day by measuring and comparing the temperature of the tire surface at three places across the width the tire: Inside, Center and Outside.
I make a little chart each time for each tire.
You can use an inexpensive IR 'laser' temperature reader, or an expensive needle gauge.
The goal is an even temperature across the width of each tire.
Hotter in center is too high pressure.
Cooler in center is too low pressure.
For the drive home I go with car Mfr's recommendations.
Last edited by 67SATisfaction; 04/11/19 08:08 AM.
65 Satellite hardtop 361/4bbl console 727 2.76
67 Satellite convert 383/2bbl column 727 3.23
67 Lancia Fulvia Sport 1.3 Zagato. Alloy body, 1.3L V4 DOHC 4-spd
67 Lancia Fulvia Rallye 1.3. Alloy panel, 1.3L V4 DOHC 4-spd
71 Alfa Romeo GT Junior 1300 Zagato, 1.3L 4cyl DOHC hemi 5-spd
82 Alfa Romeo GTV6 2.5L SOHC hemi V6 5-spd transaxle
75 Maserati Bora US spec 4.9L DOHC hemi V8 5-spd ZF
77 Maserati Khamsin Euro spec 4.9L DOHC hemi V8 5-spd ZF
07 Aston Martin DB9 6.0L DOHC V12 6spd transaxle
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