did I overheat tires?, rubber migration on A7 |
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did I overheat tires?, rubber migration on A7 |
mskala |
Oct 28 2016, 01:04 PM
Post
#21
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None |
I appreciate all the suggestions.
I'm not doing anything but the local PCA autocrosses, and I don't need to go chucking my tires after 30 runs after the 'best' grip is used. On the A6 I was using those for about 10 or 11 events. Some of the time we do 5 to 7 runs per session (half day) rather than 4. Back in the day when I was using the Kumho, it took 3 runs before they were up to best temp for grip, so I had only 1 shot at having a good run before having to wait 3 hours again. On the A6 or A7 it seemed pretty good after 1 run of warming them up. But unless my alignment is suddenly off or something, the A7 grip is worse after 4th run. Since I'm only in it for fun, and I mostly have to compete against myself, I'd be much happier with a slower tire that doesn't fall off, than a faster tire that might be designed for 3 runs before needing cooling. At least with my streetable suspension settings, I never let the car wag too much (and our courses are designed fast, usually over 60mph in a couple spots), it's not easy to avoid spins. And I dislike the water sprayer thing. On tires that heat- cycle out before the tread is gone, why do I want 8 mini-heat-cycles per day instead of 2? |
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