Preparing for my first DE, Never done this before Options

[michael7810]

I decided to sign up for DE with the local PCA club. The event will be at the Bondurant 1.1 mile road course. Car is a 72 1911cc driver with Yoko S-Drive 205-55-15s (summer tires) with stock suspension and no sway bars. So my question is besides removing all the junk from my trunk, making sure the battery and other things are secured, and removing the floor mats; what else should I do to prepare? I normally run the tire pressure at 26F and 28R. Thanks for any advise you can provide.

[michael7810]

Notes on tire pressure. My instructor said I want the hot pressure about 34 psi. I started at 27 cold and after the first session it was 32. After a couple more (as I got faster) the hot pressure was over 34. Plus the outside temp was heating up. Several times I had to let out a half to 1 lb after a session. By mid afternoon the pressure was steady at 34 following a session. The next morning the cold pressure was 27 on the left and 25 on the right.

[campbellcj]

Notes on tire pressure. My instructor said I want the hot pressure about 34 psi. I started at 27 cold and after the first session it was 32. After a couple more (as I got faster) the hot pressure was over 34. Plus the outside temp was heating up. Several times I had to let out a half to 1 lb after a session. By mid afternoon the pressure was steady at 34 following a session. The next morning the cold pressure was 27 on the left and 25 on the right.

It's normal for the more heavily-loaded (outside) tires to heat-up more and thus see a greater pressure increase. With my Hoosier R6s I normally expect around a 6-8psi increase depending on the track, the ambient temperatures, and how aggressively I'm driving. So I typically start around 30-32psi cold all around, then equalize to 38-40psi hot all around after the warmup session. Then I'll check/equalize again after the next 1 or 2 sessions, after which I usually don't check or change anything again that day. (If really motivated, I'll take tire temps and fiddle with swaybars or pressures further, but not usually.)

So then when things cool-down again, it'll be normal for the more heavily-loaded (outside) tires to see a bigger drop than the other side and you'll see uneven pressures as you did.