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Thread: How hot is too hot?

  1. #1
    Constant Bitrate
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    How hot is too hot?

    I'm just getting ready to install the car computer in my wife's car. I was testing everything on the bench and left it running for about an hour. I just happened to notice that it was very hot, so I put two thermocouples on it and on top of the case, I measured 113 F and just inside the case under the motherboard I measured 143 F!

    That is not good. This computer will go in a car in Florida where it is already very hot when you first get in the car. Plus this is a bench test. When it is installed in the dash, it will be in cramped quarters and therefore hold the heat even better. I'm pretty sure I don't have room to put a fan in the dash and even if I did, I don't know where the air would flow to.

    I made the case out of the old radio. It has lots of ventilation holes, the back is completely open and the front is about 95% covered by the touchscreen.

    The board is a Phylon and only has a small fan on the CPU.

    What do the rest of you guys do, who mount their car computers in the radio hole?

    You can see the build on my website at www.ozone1000.com

  2. #2
    Variable Bitrate dMand's Avatar
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    hi, click on my car puter install below to learn about temps, and in dash pc install, see heat remedies that I've implemented into my build.

    best wishes and happy new year!

    ~David

  3. #3
    Maximum Bitrate Woofnstuff's Avatar
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    get a 4 or 5cm fan, and suck some air out of the case

    you will need to drill / make intake holes too, more intake holes less wind noise

    and depending on the speed of the fan running it off the 5V rail of the pc might be better, if that give you enough airflow.
    ill find a pic of my case...

    thats my case, its has 2 sides open, with a grill on them and fans on one side..
    [media]http://www.mp3car.com/vbulletin/attachments/show-off-your-project/51966d1223408158-1994-nissan-bluebird-dscf1767_resize.jpg[/media]

    nice install dmand

  4. #4
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    if you have the ability, i would say underclock and undervolt your cpu if possible, and same for video, be it igp or gpu, but ya like others said you will need some kind of fans at least, though undervolting will help in reducing the heat amount

  5. #5
    Variable Bitrate dMand's Avatar
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    Thumbs up

    Quote Originally Posted by Woofnstuff View Post
    nice install dmand
    Thanks woofnstuff I really enjoy the hardware and fabrication side of the this hobby.

  6. #6
    Constant Bitrate
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    I'm checking to see where I might put a small fan, now. I'll report back if I find out anything interesting.

  7. #7
    FLAC WuNgUn's Avatar
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    Water cool that sucka!!


  8. #8
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    Water cooling will not help when the ambient temperature is high, it can only cool to that temp

    and if the ambient temp isnt high, then you probably just need regular fans and good copper heat sinks

    water cooling IMO will only help if your putting out a lot of heat, and are doing something with O/C and a hardcore video card, then it can help, but for standard cooling you dont need to go with water

  9. #9
    Variable Bitrate dMand's Avatar
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    Quote Originally Posted by WuNgUn View Post
    Water cool that sucka!!

    While that contraption looks h3lla cool, running four 120mm fans will pull approximately two amps, or 50-75 watts with the pump on. That's a bit excessive to be a practical cooling solution in a vehicle.

    I'd put that radiator in front of the vehicle's radiator just to see how it stacks up with the car running, and check the temps for improvement. It would use less voltage from the battery, thereby giving your pc additional run time.

    Although the difference may be marginal, it means extended run time nevertheless.

    A second battery will only strain the alternator if it's not a high output design. The more amps you pull, the longer it takes the alternator to charge the batteries back to its original fully charged state.

  10. #10
    FLAC WuNgUn's Avatar
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    The 2 rad fans are controlled by the mainboard...they run at 35% (1100rpm) most of the time (Speedfan)...
    The other 2 fans will be controlled manually using Fusion Brain...maybe on startup only and/or blistering hot days...

    Drutort: Are you telling me AIR cooling can cool below ambient but water cooling can not??

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