I plan to run a PDX (track day) in August on a set of V710's. I am looking for a good starting point for cold tire pressures.

Thanks

 

cold i run 30/30.... then after about 10 laps when i pull off, im up at 36 or so all around..... good grip, not twitchy at all, and just bites

 

What is your suspension set up?
What is your camber front and rear?
What is your alignment?
What is your track experience?

If you have stock suspension, camber and alignment then you will burn through any tire faster on the track and tend to wear out the outer front tires through fast turns.

For autocross and using 205/50-15 V710s I run 34 psi in the fronts and 30 psi in the rears. For the track you can go up a little depending on your style of driving, the temperature, course surface conditions, etc. maybe 2 psi more front and rear.

You can use a tire pyrometer to check temperatures across the tire as soon as you finish the first session. Higher temperature in the center only means the psi is too high. Higher psi on both edges means psi is too low. Uneven temp from one side to another can be lack of negative camber.

Give alex@tirerack.com a call if you have more questions.