Track Day Report
Wow. That was enlightening.
The Super Tramp had her first real track day yesterday. The schedule consisted of 3 sessions running CCW in the morning, and 3 sessions running CW in the afternoon. I had no instructor duties, so I could just focus on driving and having a good time. The car did great. The weather ranged from low 40s and cloudy to high 60s and partly cloudy. Other than wanting to extend oars and row to help it out on the straights, the Tramp performed beyond expectations. Its current limitation became immediately obvious: 1.4G means I REALLY need seats and harnesses. The car was capable of more than I could physically manage. I was quite literally holding on for dear life in nearly every corner, and it was exhausting. I am SOOOOO sore today.
Random observations follow. I will probably follow up with more details later.
Brakes
The Carbotech XP10 / XP8 combination worked very well. Reducing the rear compound prevented me from locking up the rears first, like I had done before. The stopping power of these pads matched with the grip in the tires, and I did not really have to think much about threshold braking. I had only 1 brief lock-up event that came during a warm-up lap, when I forgot my tires were not, well, warm yet, and it did not cause any tire damage, as I realized it immediately. The brake ducts worked wonders for keeping things cool. I measured ~280F front pad temps after running 1 cool-down lap at the end of any given session and rolling into the paddock. Hell, the front pads are still painted orange after 6 sessions; they have never made it past 1 session on the RX-8 before. For reference, my front pads on my RX-8 will measure >700F under the same conditions.
Tires
I have run a lot of tires before, but never R888s. I bought these, because TireRack ran a killer sale on them in December, with rim purchase. They have a good amount of grip, provide adequate feedback, and are relatively precise. The amount of wear is about what I expected, and the wear patterns are all more even than I have experienced before, thanks to 949's alignment settings. Time will tell how long they last. I can't really make any direct comparisons to other tires, as I have only driven this car on 360TW tires before.
Suspension
I will post a full review after another track day or two. As previously noted, I have mostly Flyin' Miata parts in my suspension. I took a toolbox with me--expecting to need to make some adjustments. I never needed to. After using the first session to set front and rear rebound according to the Penske method, I found the balance of the car to be so close to perfect as to not warrant any further adjustment. To the extent I could get the car to lose grip, which was very little, all 4 tires would slip together in a predictable way. I have 2 softer adjustment settings available in the front sway bar, should I decide I want a little more rotation in the future. Finding the edge of grip was nearly impossible; I spent most of the day looking for 10/10ths and never really found it. I couldn't stay in my seat well enough the push the car hard enough to find it. I will post actual data later, but I hit 1.4G at least once nearly every lap. The short summary is, the suspension just worked. There was never a time that I found myself wishing it would do more of X or less of Y. It was utterly forgettable, which is a very good thing.
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One other noteworthy bit of suspension information is an observation about bump travel. When I arrived at the track, I reached around the wheels and pulled the bump stops down against the tops of the shocks. The Fox bump stops hug the shock rods tightly and stay put, so you can use them measure bump travel without using zip ties. At the end of the day, I noted their location. The front bump stops had about 3/16" of space between them and the top hats on both sides. So, I never hit the bump stops in the front. That means the 550# front springs at a ride height of 4.75" is enough for this track. The rears had zero clearance, which means I did hit them. I knew that in advance, because I felt it a few times, but it was not abrupt, and did not upset the car. A little more rear spring or a little more positive rake might be worth trying, but any change back there is not a priority, since it was not problematic. FM Fox coilovers come with a number of bump stop spacers. I did not use any of them.
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Radiator and Cooling
There isn't much to say here, considering how cool it was outside. I have not dived deeply into the data yet, but skimming it appears to show I reached a max temp of a little over 200F and leveled off there every session. I still won't know how much actual cooling capacity I have until July, but it looks good so far.
Lap Times
This took me by surprise for some reason. Probably because I did not pay any attention to lap times or data during the day. The car felt really fast. It wasn't. I was almost exactly 3 seconds off my personal best in the RX-8 in both directions. The better power to weight ratio of the 8 is enough to overcome the slightly better cornering ability of the Miata. Of course, 3+ years of experience tracking that car doesn't hurt either. Another possible factor is, it has been roughly 6 months since I have had a full-speed track day due to poor weather. I have to be rusty.
Photos
I didn't take many. Sorry.
Video
I did take as much video as my SD cards would allow. I haven't gone through any of it yet, but I'll look for anything interesting enough to post. In the mean time, I did isolate the one Spinderella moment I had. This was during the 6th session, I was tired, and I wasn't even driving very hard. The only thing I can figure is, I hit some dirt or grass from where other people had run off the track there. The oversteer took me totally by surprise, and I couldn't correct it. Fortunately, there was no damage, although my alignment settings are probably a little off now.
https://youtu.be/UmlUUnn_xbs
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