rpm boy I check tyre temps with a pyrometer as soon as I pull up along with tyre pressure. This gives a good idea as to what part of the tyre is working hardest. Overinflation of a tyre will show the centre of the tyre hotter than the outside. Too big a difference beteen the outside and inside tyre temps is a good indicator that you could run more camber.

As long as traffics not too heavy Racechrono on ya mobile gives good feed back to whats working and whats not.