Quote:
Originally Posted by Redd
Great thread! Here's a tough one for everyone here - I'm looking for a 200tw tire that I can take to the occasional trackday and also daily in wet weather.
I'm currently using Yokohama Advan AD08R but it's an old compound and I'd like a tire which can give me a bit more grip on track. The problem I've had with finding a replacement is that the AD08R is one of those great at nothing, but good at everything tires. Good grip, good steering feel, handles heat cycles well, wears well, usable down to the wear markers, decently low noise levels, usable in the wet and hydroplanes straight.
Know any other tires that fit that description? I don't need it to set hero laps, just need it to survive the occasional trackday without turning into a brick after some heat. I was considering the Dunlop Direzza Z3 but they don't have the sizes I need in my country.
Hankook RS4 is popular here but having driven RS2 in the past, they were super noisy and had sharp grip drop-off after 50%. Is the RS4 better in that respect?
Any suggestions will be welcome.
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What about the factory camaro tire? Goodyear super car3? Not the 3R but the 3.
Quote:
Originally Posted by DrFerry
Quote:
Originally Posted by derbo
What is considered operating temperature?
1 heat cycle as I understand it is cool > operating temperature > cool.
Based on that understanding:
1 heat cycle = 1 session track day, 1 session cool.
1 heat cycle = back to back 2 sessions in trackday.
Is that correct to think this way?
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And
Quote:
Originally Posted by tsk94
I would consider a heat cycle essentially on a per session basis. Where you bring the tire up to operating temp and it cools down (not necessarily down to ambient temp).
1 session = 1 heat cycle
The only time it wouldn't apply I suppose is when you go out for a session and almost immediately go back out for another.
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derbo Operating temperature and a heat cycle are related, but not the same thing.
tsk94 defined one heat cycle perfectly above i.e. from the ambient condition bringing the tire up to the operating temperature range (zone) its tread compound(s) and other rubber components were designed to operate within - once - and then allowing the tire to thoroughly cool down to ambient temperature. So one on track session equals one heat cycle IF the tire is exercised hard enough to get it hot enough to "come-in" i.e. into its tread compound's peak grip temperature regime. Sorry for all the words.
A tire's rubber compound(s) - especially its tread - are designed (compounded) to perform at peak grip depending upon the environment it's being used in. Example: a winter tire is designed to be supple and provide grip well below freezing in ice and snow, but that same winter tire doesn't do well at a race track during hot laps because the rubber compound in the tread isn't designed to operate at high ambient and hot operating temperatures (it will tear and wear like cheese). The topic of rubber compound operating temperature is discussed in the .pdf file attached - should you need more detailed information (starting on page 8).
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Appreciate the extra words! It confirms my understanding of a heat cycle. I think we were on the same page, where a full heat cycle involves both starting from ambient, reaching operating temp of the tire, then cooling back down to ambient. I didn't see the pdf attached. I'll check back this thread when I'm not on my phone if I missed it due to the mobile app. Thanks guys!