Ambient temp at which street tires are better than r-compound?
11-02-2010, 07:31 PM
#1
Instructor
Thread Starter
Member Since: Oct 2008
Location: Eastchester NY
Posts: 133
Likes: 0
Received 0 Likes
on
0 Posts
Ambient temp at which street tires are better than r-compound?
Got a track day this month. I can run hoosier a6s, kuhmo v710s or street tires. At what outside temperature are you better off to run street tires?
11-02-2010, 08:20 PM
#4
Team Owner
Member Since: Sep 2000
Location: Far NW 'burbs of Chicago
Posts: 23,940
Received 2,051 Likes
on
1,362 Posts
St. Jude Donor '13
Not a real answer to your question, but just general info:
As per my experience and the guy at Goodyear who designed them, my Z51 Supercar tires lose out to the Goodyear All-Seasons at about 50'F for street use.
As per my experience and the guy at Goodyear who designed them, my Z51 Supercar tires lose out to the Goodyear All-Seasons at about 50'F for street use.
11-02-2010, 09:26 PM
#5
Melting Slicks
Member Since: Jun 2002
Location: Charleston South Carolina
Posts: 3,070
Likes: 0
Received 4 Likes
on
4 Posts
Once you start running the tires will heat up and the R's will always win, except in heavy rain or snow but I don't run them under 50 degrees because I just don't find it fun.
Last edited by TedDBere; 11-03-2010 at 01:14 PM.
11-03-2010, 12:41 AM
#7
Racer
Member Since: Sep 2009
Location: Denver CO
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
11-03-2010, 12:14 PM
#9
Race Director
on a side note, this video clip is World Challenge 2002.... on T1S STREET tires (non R). It was sub-freezing temps, light snow earlier that morning. Those tires sucked everywhere, but at least you could race on them in the cold weather.
Looking back, this video seems slow, but this was before close-ratio transmission, auto-shifting, etc. Other than cam/heads and a lightweight clutch, the drivetrain was basically OEM.
http://www.youtube.com/watch?v=FgBs6pfQw0k
Looking back, this video seems slow, but this was before close-ratio transmission, auto-shifting, etc. Other than cam/heads and a lightweight clutch, the drivetrain was basically OEM.
http://www.youtube.com/watch?v=FgBs6pfQw0k
11-04-2010, 10:55 PM
#10
Racer
Member Since: May 2008
Posts: 470
Likes: 0
Received 0 Likes
on
0 Posts
Thinking out loud here...
I have heard (and believe) that the reason wets destroy themselves on dry track is that the grooving permits much tread squirm, which leads to high hysteresis losses in the rubber which leads to excessive temperature, and the material fails.
Correct? If so then one way to get more temperature into an r-comp might be to groove it somewhat.
I have heard (and believe) that the reason wets destroy themselves on dry track is that the grooving permits much tread squirm, which leads to high hysteresis losses in the rubber which leads to excessive temperature, and the material fails.
Correct? If so then one way to get more temperature into an r-comp might be to groove it somewhat.
11-05-2010, 01:37 AM
#11
Tech Contributor
Member Since: Oct 1999
Location: Charlotte, NC (formerly Endicott, NY)
Posts: 40,096
Received 8,929 Likes
on
5,333 Posts
The problem isn't getting traction it's ruining the tires. If you are using them in near freezing temps the rubber compound can be damaged before the tires get warm. Kumho's have this warning as do several other brands. On the other hand Toyos and Nittos are able to be operated in temps above 15 degrees.
Bill
Bill
Last edited by Bill Dearborn; 11-05-2010 at 01:40 AM.
11-05-2010, 03:19 AM
#12
i have ran NT-01s when ambient temp was 27 degrees at the start of the first session (warmed up to mid/high 40s as the day progressed)
A little slippery at first, but not undriveable once you start warming them up
A little slippery at first, but not undriveable once you start warming them up
