Check out the Jaguarvision xfforum technical forum. The best out there..
Baron95 wrote:
Does anyone have a recommendation of what cold tire pressures to use on the XF-SC or XFR for track days?
Specifically this is a fast track with three long straights with terminal speeds of 130-150MPH followed by heavy braking and long sweeping sustained turns. Each session will be 25 minutes long.
Options are:
1 – Start with factory street pressures 34/34psi, and assume that pressures will rise appropriately to something a bit harder.
2 – Start lower to prevent too high pressures after heating up.
3 – Start higher to prevent excessive sidewall flexing/folding and control pressure rises.