I know all tires are different but generally speaking what PSI do you run on a twisty circuit, sports car track? I'm not looking for a complicated answers explaining pneumatics, thermal dynamics, formulas and coefficients, although, I would be impressed by your knowledge. I just want to know what P.S.I. YOU RUN ON TWISTY TRACK DAY

 

I’m the mechanic. My wife runs her SRT-6 on track days. We are still learning how to manage tire pressures. What we’ve learned so far is if the hot pressure is under 38 we have sidewall damage. Depending on the track and the heat of the day, we usually start at around 34PSI cold then try to keep them between 40-44 when hot. We run UHP street tires on powder coated factory wheels. A true slick may be different.

Others may have different experiences.

 

Thank You RKCOO, That's very helpful.

 

My experience is best grip is found around 38 to 39 psi hot on the front. But as pointed out, you will kill your tires if your still on stock suspension and camber. I like 36 psi hot in the rear tires. If your using "air" you'll find the pressures increasing about 10 psi if your driving over 80%. DOT racing tires don't change what pressure works best on my car at my tracks. Not knowing how hard your going to push, I like RCK00's 34 psi recommendation.

Les

 

Sounds good, thank you.

 

What I do for autocrossing for street tire classes is take the weight on each end of the car, divide by the load rating of the tire, and multiply but the load rating psi (used to figure 1 gee cornering, if more adjust appropriately.


When I first started doing that (51 psi in front) I found the car cornering faster and was hitting inside pylons.

 

Thanks Padgett

 

38 front
36 rear
Track days and autocrossing. Adjusting from there depending on conditions.

 

Thanks for the input Wedge.