So I thought I followed up, but apparently only on the other forum... here's the latest:
First day on them at Limerock (they were essentially brand new)
Short summary: not a track tire at my level. Grip was decent, but the feel was not confidence inspiring. Significant flex in the sidewall under hard cornering and it got very floaty going into corners. The best times I could pull were low 1.05's, which is about 0.5 seconds off the best I saw with the Sumitomos. I'm gonna run them again this morning since my R1's are toast after an hour long session yesterday evening.
Wear was good though. And I'm gonna play with pressures more today to see if I can eek out a few more tenths
Second day at Limerock
Friday update from the track. Tires are better today. Nearly a second quicker today than yesterday. Thinking they got heat cycled yesterday and today are a little more grippy. The feel is better today too. I did play with tire pressures as well and I think I found the happy place.
Final track review:
I decided to run the G2's again at Limerock today as the weather forecast was questionable. Turned out I got 3 dry sessions before the rain moved in, so I got about an hour of seat time and ~75 more track miles on the tires today.
Wear: Minimal wear after putting on about 125 total track miles at Limerock. This particular track is brutal on the drivers front tire, and I rotated the wheels after about 50 miles to keep wear even. That said, the tires held up very well with minimal wear, as I'd expect with a 320 treadwear tire. There is a very small amount of chunking on the left front tire, nowhere else though. I pushed them about as hard as I could today
Subjective review: Once I dialed in pressures (my best results came with the hot tire pressure at around 38), the floaty-ness that I noted yesterday was quite a bit better, and the tires really did not grease up at all, despite me driving the car hard. With the square setup, the car was quite neutral on these and I could induce great rotation with lift throttle, as you will be able to hear in the video below, especially through Big Bend (turn 1) and the left hander into the right hander (turns 2 and 3). When the rear stepped out, it was very controlled and the tires give just enough audio feedback to warn as the limit was reached. The sidewall is definitely more flexible/soft than the R888's or BFG R1's, but that's very much expected. The tires worked really well at the track today though! And on the ride home, they are very comfy riding along all surfaces. Lastly, the skies opened up on my drive home, so I finally got some drive time in very wet conditions. Only brought it up to about 75 mph, but zero indications of hydroplaning, and the grip accelerating was perfectly reasonable. I tossed on my R888's right afterwards to support tomorrow's track day and took them to get take out - difference is very noticable. The R888's break away MUCH sooner. I don't have any lap data in the wet, as I'm a track brat and pretty much only go out when it's dry now
The data: So lap times and data are the most telling! I got Limerock times down to 1.04.7 today, which is exactly 0.11 seconds slower than the Sumitomo HTR ZIII's when I ran them. Worth noting, they were 275 rear and 255 front compared with the 265 square setup I have now. Minor difference, but worth noting. I will say though, they HOWLED and got greasy. The Nitto's take the track heat better so far. I prefer them thus far. As far as braking performance, they were able to pull about 0.9 lineal g's from the quick data review I saw. The highest cornering forces I saw were about 1.2 g's in the uphill compression zone, and about 1.1 in the "normal" corners. This is on par with the Sumi's and the OEM Pirelli's. For reference, I pull 1.4 in the uphill on R1's and 1.2 in "normal" corners. Doesn't sound like much, but it's good for about 2.5 seconds faster lap times at Limerock. But those are dedicated track tires!
Anyways, here is some video footage from today on the Nitto's
Anyways, here is some video footage from today on the Nitto's
https://youtu.be/AsMV9rhLnCE
And for reference, here are some laps on the Sumi's.
https://www.youtube.com/watch?v=x7VLKU1Wn8k
Lastly, here is a lap on BFG R1's
https://www.youtube.com/watch?v=-Uzy4s2qnIo