[Owen Pyrah]

Thanks Owen.
Yeah, 25-27 psi warm, that's where I am now.
It's not a general level that applies in any situation (car, track, compound), though, right ?

There's something I don't understand here:
why would the end goal be "warm tyre pressure" rather than "warm tyre temperature" ? Wouldn't temperature be the prime factor for grip ?

That level should apply to most GT3 cars. You're right, it is affected by the car' weight, acceleration (rom braking, throttle and turning) and tyre construction (side walls and casing mainly I think). But most GT3 cars are a similar weight and performance so they should be all similar.

End goal is maximising contact patch and keeping the tyres the shape they were designed to be. Yes, when they warm up they get more sticky but the optimum temperature range is often about 10-25*C while the optimum hot pressure range is often only 1 or 2 psi. You will feel a difference of 1 psi in your driving more easily than you will feel a difference of 10*C.

If tyres get too hot they wear much quicker and get greasy. If tyres don't get hot enough they don't provide quite as much traction but really the difference between 40*C and 80*C won't be too great.

I tried to find a good resource on tyre pressures but this is the best I could do:
https://motorsportessentials.co.uk/blogs...-pressures