Assuming I don't have work commitments next Monday, I may attend the Apex track day at Mosport last minute. Can someone please remind me what my tire pressure should be for purposes of the track?

 

if you are new to tracking, and car is bone-stock/OE tires, I'd say run them at factory recommended pressures and come in after the first 5 laps and re-adjust them down back to factory pressures.
There is no 'correct' pressure, you will find what works/feels/wears best as you go, typically mid 30's hot pressure is where a sweet spot is though...
Have fun!

 

Thanks. I did two events last year and before the 2nd event, I happened to be at Downtown Porsche and told them I was going to the track the next day and I think they over inflated (low 40's). My instructor reduced the pressure becuase he didn't like how the car was driving. That's why I'm asking. Car is bone stock....

 

In the past I heard people say that tires should run at 42 PSI hot, doesn't matter the type... so some people overinflate due to that rumor and garbage. That means 42 after about 3-5 laps at least of non-pro driving. Over 40 cold would be scary...

With that said, start at manufactures spec... Totally agree with Rob. When you come in, check your pressures... Then ask some people what to do based on your readings. You will hear more theories and suggestions then you have tires...

 

Agree with the above. My added 5 cents........ check them hot after your session (as soon as possible) and at the very least adjust them so that they're all equal (or maybe slightly higher in the back, on my '86 I keep my rear about 1-2psi higher than the front due to the weight in the rear). Try to look at the tire and see how far down the side you are wearing. If not enough, let out some pressure. If too much, inflate a little (you don't want the sidewall rolling over).

Other than ensuring you are wearing the tires nicely, at our level (occasional track with street tires) I don't think a few psi one way or the other will make a huge difference in performance.

 

To keep you safe on track AND more importantly when you are going to go home:


DON'T touch anything. OE pressure. Enjoy. Go Home. Don't let anybody touch your tires.

Vince