Track day at Thunderhill East on Saturday. Conditions were pretty tough as it was over 100F the whole day and very smoky from some nearby fires. This was my first time running the east course (3 miles), I've only run the 5 mile east/west combo before, which omits a section of the east course.
I ran in the Novice group, as such the first two sessions were lead-follow and quite boring. Thankfully I will be in point-by group from here on out. There were 5 sessions for the day but I only ran 4, as I had about a 2.5 hour gap between session 4 & 5 and temperatures were approaching 110F.
Session 3 went pretty much as well as I could hope for. I was the first car out and didn't see a single person in my mirror until the last lap of the session. The only issue I had was with heat. Starting on lap three I felt a little heat soak, and my oil temps had reached 265. I backed off and ran around 80% for the rest of the session, trying to keep oil temps below 260. With the temperatures today I'm not sure if a bigger intercooler or oil cooler would've helped too much. On previous track days when it was 70-80F I had no heat soak or oil temp issues.
Session 4 was similarly good but I was in an M3 sandwich the whole time. I went out first but pointed by an E92 M3 after the first lap. He got caught behind an F80 M4 coming out of the pits late and I quickly caught both. The F80 M4 pointed the E92 M3 by but not me. Then, the F80 M4 proceeded to pass the E92 M3 on the front straight, only to have both of us catch him after the first two corners. In this time, ANOTHER white F80 M3 had caught up and was now waiting behind us. After a lap at good pace I was pushing to keep up when I got the white smoke of doom coming out of the twistiest section of the course. My oil temps were again surging north of 265F so I decided to back off and point the white M3 behind me by. The rest of the session was at 80% just managing temps. Good fun though. You can see the white smoke at about 50s in the below video:
Overall it was a good day, I thought the car held up pretty well despite the tough temperatures, and I was happy with my preparedness in getting out on course first so I could get some quality laps in. Tracking again in a month at Laguna Seca and hoping to put down some good times. Below is my best lap from the day.
Unfortunately the way home was a bit rough. I hit a nail on I-5 and got a flat tire for the second time in two months. As it was my front left tire, I had to swap the spare onto the back left and put the back left tire on the front in order to clear the brakes. Was like 110F out while I was doing this and felt like I was going to pass out. At least I had all my tools with me from the track.
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Next up is 40k service this week. I've always ordered the newest revision (BL) of the PCV valve to try and remedy the oil surge issue. Should have that installed before next track day.