This post from the 993 section of the Rennlist.com bulletin board explains the setup:
https://rennlist.com/forums/993-forum/11282...-23-2019-a.html
You must sign up on the above thread, be a Rennlist.com member, and show up with an aircooled Porsche, not specifically a 993.
Projected weather for next Tuesday is a high of 70, partly cloudy and 10% chance of rain.