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Model 3 Temperature Data

Discussion in 'Model 3' started by SageBrush, Jun 18, 2018.

  1. SageBrush

    SageBrush 2018: Drain the Sewer

    Joined:
    May 7, 2015
    Messages:
    6,049
    Location:
    Colorado
    Full sun today, ambient temperature 82F (28C), I took my handy infra-red thermometer gun (love that thing) out for some shooting.
    IR.jpg

    Car is in the sun, mostly directly towards windshield and roof now although towards the side of the car earlier. Windows are 1/3 open, sun shade on windshield
    Skin: 27C
    Concrete driveway shaded by tree: 29C
    Concrete driveway in the sun: 44C
    Front black seat in shade: 40C
    Car roof outside, in direct sunlight: 42C
    Car roof inside: 50C
    Silver metal: 42C
    Sunshade exterior facing: 40C

    Interesting numbers. My guesses ahead of time were poor. It appears that the greenhouse effect is strong ( probably not from the roof) even on a windy day and with windows partly open, and the roof tint is an insulator.
     
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  2. Twiglett

    Twiglett Single pedal driver

    Joined:
    Oct 3, 2014
    Messages:
    1,710
    Location:
    Austin
    yep - the roof is pretty good at blocking the worst of the heat.
    The biggest heat gain culprit is probably that great big windshield that can't be tinted.
     
  3. ℬête Noire

    ℬête Noire Active Member

    Joined:
    Jan 30, 2018
    Messages:
    2,220
    Location:
    TX
    #3 ℬête Noire, Jun 19, 2018
    Last edited: Jun 19, 2018
    <Archer GIF: Can't? Or won't?>

    "5. A clear (un-tinted) UV film is allowed anywhere on the front windshield without a medical exemption being required."

    https://www.dps.texas.gov/rsd/vi/consumerinfo/windowTint.htm

    With a high end film it's mostly NOT the visual tinting that blocking the heat radiation, there's not a lot of difference in heat blocking as you range between 5% and 90%. So you go with as clear as is available (I believe normally 90% nominal) and, as far as I've been able to gather, you're good. You certainly won't be bothered by LEO unless they've looking very, very hard for an excuse to.

    Caveat here is I'm not a lawyer and if it was out of bounds modification you may end up in a bad situation if involved in an accident, so checking with an attorney in the appropriate area (traffic/accident law) isn't a bad thing to do. I'll probably try do that before I commit to it when I take delivery and get my tinting down (wife didn't want her front tinted at all). I won't be surprised if the tint installer says "sign this waiver to CMA" but that wouldn't phase me much.

    P.S. Definitely don't install the cheaper films. Some of those discolor and darken over time, with odd colours. If you also wear polarized lens glasses, it could produce some odd "rainbow" artifacts at some angles so check as appropriate there. I don't have an issue with my Maui Jims on the side windows of wife's current car.
     
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