Tyre Pressures

[Nogg]

Hi all,

Doing a track day at Oulton tomorrow and was wondering what tyre pressure people would suggest to start off with.

Car is a Mk1 AW11B running Yokohama A539 195/50x15 otherwise a stock motor. Forcast is for patchy rain.

Thanks
Nige

[Century Motorsport]

Best thing to do is to go out as is (make sure they are all the same to start with) then once you've had a decent run and got them up to temp come in and measure them.

A good start would be to aim at about 2bar hot ... you'll find that the outside 2 will rise more then the inside so you may need to let more air out of some than others.

You don't want to overheat them , even road tyres will go off and you'll be amazed at how much the grip drops away when they get too warm.

Keep checking this after each session - you'll find the harder you push it (or the dryer it is) the more the tyres will go up.

[Nogg]

Well, I started with 26psi and after a few laps in the dry came in and they'd gone up to 33 ! Dropped
back to 28 and they seemed to work well. For road tyres

[Jim Galbally]

after some experience i now tend to take out about "10 seconds worth" of air before i go out for the first time, then after a warmup session bring them down further to reccomended temp then after a proper session check again and adjust.

then just keep an eye on them during the day

oh, and REMEMEMBER TO PUMP THEM BACK UP ON THE DRIVE HOME!!! lol

[Tomiam]

Buy a digital tyre pressure gauge if you dont already have one. No point messing about guessing and its not as though they are expensive.

I set mine up to 27 front, 28.5 rear and do a session. Then check them again, adjust to what I feel is right. For me thats 32 front and 33 rear.

Your tyre pressures will also change a small amount across the day. I dont keep re-adjusting them over and over. Unless its gone from cold rainy day to blazing hot sunshine or suchlike.