OK, I just tried it, once again, tyre blowout on lap 5. I closely watched the tyre temperatures this time. The rear tyres were fine and stable, slowly reaching about 60 or so. The right front tire, was around 65 or 70, but fluctuating rapidly. The left front tyre was about 85, even more wildly fluctuating. I must be locking the front tyres, especially the left one, and as the wheel rotates the hot spots are showing up very, very briefly (so briefly that I can't read their temperatures, but they must be higher than 100).
My next experiment will be to race about 5 laps, and then slow down to a crawl, and see if I can capture the temperatures of those hot spots.
So my next question is, how do I avoid locking up the front tyres? I know you might say to drive more conservatively, or take corners more slowly, but I think I'm doing that, and if I go any more slower, I'm seriously going to be a road hazard, and my times will be way too slow.
Can someone please post a default race_s setup? There's a small possibility I may have inadvertently overwritten it, I'm not sure.