jmn444
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What makes those tires a risk for delamination?
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I disagree.Rear looks good. Fronts might not last the day. How many heat cycles?.
Who? Me?What makes those tires a risk for delamination?
Ok good, thought you were saying there was an issue. They look fine to me as well. Just making sure I wasn't missing something I should be looking for on my own tires.Who? Me?
Delamination is more of a function of tire pressure and temperature (as well as overall tire condition). Too low a tire pressure is usually the cause of a delamination. That is why you have a warmup lap to get your pressures up.
The tires in question are fine. Again, me personally, I choose to start with a new set of fresh tires on a high speed track.
I'm quoting you, but I know that you know this stuff.....Ok good, thought you were saying there was an issue. They look fine to me as well. Just making sure I wasn't missing something I should be looking for on my own tires.
Yeah but running out of tires midday is a giant waste of money. Id bring 2 new tires for the front if you have them. Its saved my day before. My cup2 have usually heat cycled out before they corded.I disagree.
Those look like normal use cup 2s. He could even use a little more negative camber. Again, it all depends on the track
Thats why I have another set of wheels with tires for that reason. I also i bring extra rotors and pads.Yeah but running out of tires midday is a giant waste of money. Id bring 2 new tires for the front if you have them. Its saved my day before. My cup2 have usually heat cycled out before they corded.
I start with 28 as per the manual, and then adjust after each run as needed. I had to drop some more after the first run as it went up over 36 when hot, but I try to keep them around 35-36 when hot..They got one more day and then inspect again . Looks like they wear fine. What tire pressure you start with?
I am not sure, how do you count "heat cycles" ? I have 4 track days on them and 1 Autocross event, and 5000 total miles or so... They still stick on the track pretty well, I am not a very aggressive driver... Thursday I did New Hampshire Motorsports park with SCCA (track night in America) which is a very technical track, a lot of low speed chicanes, and off camber up and down the hill turns...Rear looks good. Fronts might not last the day. How many heat cycles?.
toe plates and camber/caster gauge... only part that's iffy is the thrust as I haven't strung it to verify rear is in line with front but it drives awesome.
Thanks, and yes; those are the CF stock wheels that came with the car, with stock original tires...I think the rears definitely have another day in them, or more, and they are wearing nicely. Hard to tell from the pics, but the fronts look like they might be getting close to cord. I would run them but just check each session. I'll bet you could coax another day or two out. My fronts have worn a bit more evenly than those (-2.3* camber, CF wheels), but that could be down to driving style also.
FWIW, my experience on the Cup2 for HPDE use is that they slow down about 1 second a lap after a couple heat cycles, then they just settle in around that level until they cord. They didn't progressively slow down more and more through their life. If you're not competing, no point in spending money for fresh tires unless, as Tomster said, you're at a track with particularly high loads liked banked, high-speed corners.