Quote:
Originally Posted by cdrptrks
This is key. If you want to be able to do 20-30+ minute sessions without the tires overheating badly I would vote for 3R or slicks. Super 200 tires can do a few fast laps which is ideal for Time Trials on a track you know welll but they won't last anywhere near a 20 minute session on heavy cars without overheating from what I've heard/read. For example people spray RT660 and A052 tires with cold water between autocross runs that last less than a minute to cool them down.
Even Supercar 3 tires benefit from cooldown laps during a 20+ minute session if you're driving at a fast pace.
RT660 tires are listed as having a similar warm up, heat tolerance, and pace to Supercar 3 tires here but I think the warm up is actually much better on RT660 considering how it is popular for Autox but nobody at SCCA AutoX Nationals last year was using Goodyear street tires and considering how much trouble I have had warming Supercar 3 tires up the times I have autocrossed with them: https://grassrootsmotorsports.com/ar...-buyers-guide/
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That chart is spot on... good stuff