This is my best timeslip from the event, which I believe is the best time recorded with NEDRA for a 2008 Roadster: 12.982 second 1/4 mile ET at 103.48 mph.
My best 1/4 mile speed by a tiny margin was later that evening: 13.085 second 1/4 mile ET at 103.65.
I've entered the data from all of my time slips here:
Time slip data in Google Docs Spreadsheet
My runs on Friday started with a state of charge around 50% in performance mode, and dropped to about 30%, with Richard and I both taking a bunch of runs and no time charging. My highest speed run Friday was a two-footed start which finally got me into the 100 mph club at 100.07 mph. My best time was on another run, 13.318 second 1/4 mile ET at 99.82 mph. I only tried the two-footed start twice, the first time with a terrible 0.789 reaction time, the second slightly improved at 0.516. I need to practice that some more. While this affects who crosses the 1/4 line first, it doesn't hurt the ET.
Ted Merendino told James that the two-footed start won't hurt the car, despite the terrible sound it makes, but I wasn't confident enough to really push it until I heard that Scotty did it full on, both feet on the floor, getting the best Tesla time by a good margin in James' Sport. I'll definitely be trying that some more Friday.
My times Saturday were better by a huge margin, over 0.3 seconds faster. RichKae had the same experience in my Roadster. So, something made a big difference. At first I attributed this to starting with a higher SOC, 215 ideal miles in performance mode, compared to the 100 down to 50 range we were in on Friday. But then Scotty turned in the best time of the weekend in James' Sport with the SOC down in the range Richard and I were running on Friday. So now my theory is that the battery pack being warm is also a factor. All of my runs on Saturday were with the car recently off the charger and/or on consecutive runs. My last, and worst, time of the night was after the car had been off the charger for at least an hour and also idle after the previous run for over 30 minutes. My time on that run was off by nearly 0.1 seconds from my best time, but that run was my best speed of the weekend. Curious.
On Friday, Richard and I together ran 16 times, so you'd think the battery pack would have been warm for some of those runs. I don't have Richard's times, but I made four runs in the first hour and I think he did two runs in the middle of those, so six runs in one hour, and still we were 0.3 slower than our times on Saturday.
Another difference between the two days is that we started runs as soon as we could, at 7:11 pm, with the sun still beating down on the track. It was especially nasty with the track aligned so that we were driving straight into the sun for those early runs. On Saturday, we waited (and charged) until sundown, then started our runs at 8:47 pm. The charging area was also cool on Saturday, with the Killacycle support RV providing some shade. So, perhaps there's something with getting the battery pack warm from charging, but not cooking the PEM as much.
I'll try to watch both temps more closely next time, but I know I was getting the PEM up to the first yellow bar very briefly, right after a run, on Friday and didn't see that at all on Saturday.
Linear Mode
