+ Reply to Thread
Results 1 to 8 of 8

Thread: Help with tire temps

  1. #1
    Senior Member TYP85's Avatar
    Join Date
    May 2007
    Location
    Woodland Hils, CA.
    Posts
    169
    Liked
    48 times

    Default Help with tire temps

    Fontana, roval, ambient temps about 78

    Proxes "RR" 225/50-15'son 6ul 15x8

    I kept dropping the pressure as ambient and brake temps went up to keep the fronts at ~39-40psi hot, rears ~35-37 hot

    2700lb. car w/driver- front wheels drive

    Temps taken with Longacre pyrometer

    L Front

    out mid inside
    138 150 153


    R Front

    out mid inside
    144 153 156


    L rear
    out mid inside
    114 129 130

    L rear
    out mid inside
    133 140 140
    Attached Images

  2. #2
    Member
    Join Date
    Apr 2016
    Location
    Sydney, Australia
    Posts
    42
    Liked
    35 times

    Default

    What camber are you running? We have 5 degrees front, 3 degrees rear, and find that the outside of the fronts has cooled down by the time the car is back in the pits. So I tend to look at the middle and inside, to figure out if the pressures are right (your fronts might be a little low), and the tyres are getting to the manufacturer's recommended heat range.

  3. #3
    Senior Member TYP85's Avatar
    Join Date
    May 2007
    Location
    Woodland Hils, CA.
    Posts
    169
    Liked
    48 times

    Default

    Quote Originally Posted by Sprinkles View Post
    What camber are you running? We have 5 degrees front, 3 degrees rear, and find that the outside of the fronts has cooled down by the time the car is back in the pits. So I tend to look at the middle and inside, to figure out if the pressures are right (your fronts might be a little low), and the tyres are getting to the manufacturer's recommended heat range.
    About 3.2 in front, 2.0 in back on a solid axle, so no dynamic change.
    I noticed the left side tire temps climed more than the right, strange considering the long banked right turn on the oval...

  4. #4
    Senior Member bellwilliam's Avatar
    Join Date
    May 2007
    Location
    La Verne, California, United States
    Posts
    7,597
    Liked
    2246 times

    Default

    your tire temp looks too low to do a pyro reading.
    ACS exit is after the long front straight, followed by a quick left / right (don't do much) at T3, then 180 left hander (heats up right side tire only), then a long straight, then exit. If you do drive the long pit road back to garage, your tires are already cooled.
    Supermiata S1, SuperMiata S2, Supermiata S3
    13 Tesla, ma: no engine !!
    17 GT350 !!
    08 M3 - Carmax warranty !!
    96 NSX
    06 EVO MR
    15 Mini Cooper S

  5. #5
    Senior Member TYP85's Avatar
    Join Date
    May 2007
    Location
    Woodland Hils, CA.
    Posts
    169
    Liked
    48 times

    Default

    Quote Originally Posted by bellwilliam View Post
    your tire temp looks too low to do a pyro reading.
    ACS exit is after the long front straight, followed by a quick left / right (don't do much) at T3, then 180 left hander (heats up right side tire only), then a long straight, then exit. If you do drive the long pit road back to garage, your tires are already cooled.
    Yes, cool down lap then the long drive back to the garage.......

    BTW, tire pic is of rt front after 5 sessions and driving home 80mi, car was understeering a little...

  6. #6
    "Shoe"
    Join Date
    May 2008
    Posts
    1,763
    Liked
    515 times

    Default

    PROBE type pyrometer? Sticking it in all the way? (Preferably at a 45* angle)

  7. #7
    Senior Member TYP85's Avatar
    Join Date
    May 2007
    Location
    Woodland Hils, CA.
    Posts
    169
    Liked
    48 times

    Default

    Quote Originally Posted by Stuntman View Post
    PROBE type pyrometer? Sticking it in all the way? (Preferably at a 45* angle)
    Temps taken with Longacre pyrometer "probe"

  8. #8
    Member
    Join Date
    Aug 2007
    Posts
    54
    Liked
    4 times

    Default

    Quote Originally Posted by bellwilliam View Post
    your tire temp looks too low to do a pyro reading.
    ACS exit is after the long front straight, followed by a quick left / right (don't do much) at T3, then 180 left hander (heats up right side tire only), then a long straight, then exit. If you do drive the long pit road back to garage, your tires are already cooled.
    +1, to get an accurate temp reading, you need to come in hot, and really need a "crew" to take a quick reading, temps can quickly drop 30 deg by the time you get unbuckled.
    Emilio has a great tire temp how to somewhere on the 949 site I believe.

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts