If you're not finding the info on SCCA's site, and you have a smartphone, get Race Monitor from your app store, and spend the $3-$4 for the upgrade, which will give results from prior sessions as well as enabling watching a current session. Find the CoTA US Majors event on the opening page.
Even though SCCA said they weren't timiing P1 yesterday, it was still on there, all groups. Everything from today and tomorrow should be on there as well.