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I run at Laguna all the time. My vehicle is slightly heavier than your ZL1, but the advice is still valid. Our cars weigh more than a true race car and tend to generate heat faster and hold it longer especially in the front. You want to maximize the contact patch without overheating the tire. If you air it down, you want to watch for sidewall flex and tire rollover.
If you run PS4S, they are a street tire and can overheat if overinflated. However, they have a relatively soft sidewall so I tend to run more pressure in those:
Front 32/Rear 30 with the goal of building 6psi with the warm up lap and
Hot being at 38/36. Bleed down if you’re at 39 psi.
I run RE71RS but I imagine it’s similar to the Goodyear Supercar 3’s, which as a 200tw tire has a much stiffer sidewall. As a competition tire, they can handle a bit more abuse before overheating. My sweet spot with them have been
Front 30/Rear 30. My hot pressure goal is somewhere around 35 hot and I’ll air down for that. Make sure you have a good quality tire gauge and check it as soon as you get into the pits.
If you find that you are losing traction out of turn 11 or feel a little loose in turn 2, lower the rear a little bit. The left front will get hammered a bit in turn 5/6, corkscrew and turn 9 so keep an eye on it and that’s why you might have heard to run higher pressure. Other than that, have a great time.
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