I burn a new set of RRs in a weekend. 5 or 6 heat cycles max, after that, they aren't competitive. Usable for practice for heat cycles 7-10.
I burn a new set of RRs in a weekend. 5 or 6 heat cycles max, after that, they aren't competitive. Usable for practice for heat cycles 7-10.
There's an R888R out now. 100 treadwear at ~6/32" tread depth (RR is 4/32" RA is 8/32"). I wonder if a higher treadwear tire will be more consistent across heat cycles?
Toyo/Nitto have a bunch of tires with varying tread depths in the 100 treadwear range, R888R, R888, RA1, and NT01. There's also an RS1 full slick, however it's non-DOT.
https://www.toyotires.com/tires/competition-tires
- Josh
CMC #50
It probably depends on the load the tire sees. Mike's car with full aero likely puts significantly more load on the tires than a CMC car. A few degree temperature increase due to higher load per heat cycle might make them drop off much more dramatically, just a hypothesis. So when comparing across platforms it could be both. Tyler is seeing potential better life on the Miata.
I'm assuming the tires are 'curing' with heat cycles, (i.e. getting harder, would last longer rubberwise but have less grip). Does the length of the heat cycle matter? If you over cook a set by trying to pass Jerry for 10 laps can you use them up in one race by getting the tire temp to 250*F? If you don't get them up to 220* (max recommended temp) is it a partial cycle? Clearly, I don't understand tire design.
- Josh
CMC #50
It was the fast miata guys that introduced me to the phrase "no more than five to be in the top five", so my guess is once Tyler is at full song in a Miata he'll have the same experience.
I am getting comfortable with the notion that the thin to win RA1s weren't actually thin to win, rather that we were just slow.
Al Fernandez
Tire temps drop fast, even one turn to a next they can change pretty dramatically. We had live IR temp probes looking at wheels on our FSAE car for test and tune. Not our car, but same idea: http://sine.ni.com/cs/app/doc/p/id/cs-722#
CMC #50
One way is for him to come out to Mid-Ohio for one of the three races (April, May and August) there this year and hang with the group. He could also contact the regional director Bob Denton. His contact info is in the back of the CMC rule book.
Where in Ohio would this guy be moving to? We have a couple of racers in the north east ohio area.
Spec Corvette is running a Falken street tire with a 200 treadwear rating. Those cars have to weigh 3,200 post race with driver at have around 320 rwhp.
http://www.falkentire.com/tires/pass...is-rt615k-tire
Bryan Leinart
CMC #24
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