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Thread: How hot is too hot?

  1. #11
    Constant Bitrate
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    dMand- Ok, I've read your whole post now, in some detail and I'd like to congratulate you on your attention to the install.

    Here are some comments and questions:

    First there is a small error at the beginning. You mention it was freezing outside at 32c and that the computer was at 22c and you were wondering why it was 10 degrees cooler. The answer is that 0c is freezing, so it was actually 22c hotter than ambient.

    Second, I don't totally understand the install. You say that the plate you made acts as an air vent, but then you cover it with the airbag cover (or do you leave that off most of the time?). You also mention that it is vented elsewhere, but don't mention where. Also, isn't the fan on the passenger side of the door covered by the door when it shuts?

    Your install would not work for me, because I do not want to remove the airbag. Plus, I use my glove box and don't want to give up that space. Nor do I wish to mount the LCD on the passenger door.

    Don't get me wrong, this is a really cool install, it's just not for me, and the original question regarded whether or not I needed cooling and if so, did I just choose the wrong components or something, because I knew that other people had essentially double DIN computers in their dashboards and I was wondering how they kept them cool. I have limited space in the dash for fans.

    Also, I was under the impression that larger "home" monitors don't use 12V DC. I thought they were 17 VDC or something like that. Can you elaborate. Also, if it is that big, it is probably not sunlight readable, so do you get a lot of glare, because in my other car, I was thinking about using a normal monitor as well. You can get a lot larger size for a lot less money if you don't go with one of these tiny screens.

    Thanks for the info and great install!

  2. #12
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    Quote Originally Posted by WuNgUn View Post
    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??
    no i mean neither can, but water cooling can pull more heat, but in that guys case and in 90% of people who do carPC's they dont make that much heat to start with and only good copper HS with fan is enough (and some fans to move the hot air some other place if possible)

    only peltier and refrigeration can cool below ambient

    and both take a lot of energy to run, and peltier can take 2x what it cools and you still have to cool the hot side lol

  3. #13
    FLAC WuNgUn's Avatar
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    Yeah, a peltier would be certain overkill in a carpc...lol
    You'd need a second OPUS 320 just for the cooling system!

    I've been careful in designing my setup...the pump and the two 'case' fans are powered from a distribution terminal, not the PSU...as is the CCFL lighting. I plan on controlling all of this with a Fusion.
    However, as an overall power consumption standpoint, I'd not be any good at going to the drive-in theater!

  4. #14
    Variable Bitrate dMand's Avatar
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    "First there is a small error at the beginning. You mention it was freezing outside at 32c and that the computer was at 22c and you were wondering why it was 10 degrees cooler. The answer is that 0c is freezing, so it was actually 22c hotter than ambient."

    Kudos profozone! Thanks for answering my question. I'll have to go over that paragraph once more.

    "Second, I don't totally understand the install. You say that the plate you made acts as an air vent, but then you cover it with the airbag cover (or do you leave that off most of the time?). You also mention that it is vented elsewhere, but don't mention where. Also, isn't the fan on the passenger side of the door covered by the door when it shuts?"

    Of course, the cover is removed when the pc is running. I put the cover on when I leave the vehicle.

    Very sharp! I failed to indicate that
    the 30mm fan is an exhaust fan after it was added yesterday.


    "Also, isn't the fan on the passenger side of the door covered by the door when it shuts?"

    Negative, there's a decent gap 1/4" wide by 29" long, for the fan to pull air with the door closed.


    "Your install would not work for me, because I do not want to remove the airbag. Plus, I use my glove box and don't want to give up that space. Nor do I wish to mount the LCD on the passenger door."

    The decision where you want to mount those items, is, of course, yours. Make sure you weld it in place, or hide it good.

    "Don't get me wrong, this is a really cool install, it's just not for me, and the original question regarded whether or not I needed cooling and if so, did I just choose the wrong components or something, because I knew that other people had essentially double DIN computers in their dashboards and I was wondering how they kept them cool. I have limited space in the dash for fans."

    I have not seen pictures of your build yet, so I can't address your dilemma. Yes, you would need some sort of cooling apparatus living in a hot environment. As a side note, you'd get more replies if you posted pictures of the install here.

    "Also, I was under the impression that larger "home" monitors don't use 12V DC. I thought they were 17 VDC or something like that. Can you elaborate. Also, if it is that big, it is probably not sunlight readable, so do you get a lot of glare, because in my other car, I was thinking about using a normal monitor as well. You can get a lot larger size for a lot less money if you don't go with one of these tiny screens."

    I don't have issues with the sun, or glare. My music play list is loaded before I leave the garage, then I turn off the monitor. Everything thereafter is controlled via remote control (play/pause/rewind/fwd/power off/phone dialing/hibernate/sleep... etc).

    Powered back up, the music plays where it left off. The monitor is not needed in those situations.


    Home monitors come in an array of input voltages. With proper research and development, any home LCD can be used in today's automobile, regardless of power input. Where there's a will, there's a way.

    You're right, you can get more bang for your dollar by taking your time while window shopping, and choosing your parts wisely.

  5. #15
    Constant Bitrate
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    Thanks. That answers a lot of questions.

    I'm too lazy to put pics up, but you can see the whole thing on my website at:
    www.ozone1000.com

    You have to go to Cars>Solara>CarPC.

  6. #16
    Variable Bitrate dMand's Avatar
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    Thumbs up

    aaah, I see, i'll have a look.

    Thank you too, for bringing those issues to my attention. I've re edited my carpc post once more.

  7. #17
    Variable Bitrate dMand's Avatar
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    Thumbs up

    Quote Originally Posted by WuNgUn View Post
    Yeah, a peltier would be certain overkill in a carpc...lol
    You'd need a second OPUS 320 just for the cooling system!

    I've been careful in designing my setup...the pump and the two 'case' fans are powered from a distribution terminal, not the PSU...as is the CCFL lighting. I plan on controlling all of this with a Fusion.
    However, as an overall power consumption standpoint, I'd not be any good at going to the drive-in theater!

    I must commend you on the craftsmanship, it's a very neat design. I nearly fell out of my chair when I first seen it.

  8. #18
    Variable Bitrate dMand's Avatar
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    Thumbs up

    Quote Originally Posted by drutort View Post
    no i mean neither can, but water cooling can pull more heat, but in that guys case and in 90% of people who do carPC's they dont make that much heat to start with and only good copper HS with fan is enough (and some fans to move the hot air some other place if possible)

    only peltier and refrigeration can cool below ambient

    and both take a lot of energy to run, and peltier can take 2x what it cools and you still have to cool the hot side lol
    Very true with the peltier design and the reefer deelio

    Have you ever seen those Camel Snus chill boxes that gas stations, and vendors have behind the counter?
    I got a chance to tear one open. It actually cools the tobacco canisters via peltier effect.

    I thought of putting a carpc inside. But, after much careful scrutinizing, I came to the conclusion that it wouldn't be able to hold up to cooling a car pc. And just as you stated, one would still have to work on cooling the peltier mechanism. lol That in itself would be a chore.

  9. #19
    Who am I? HiJackZX1's Avatar
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    I am very anal about my system being cooled. I have two 80mm fans blowing air through the front, at a slight angle that blows across the MoBo, processor and retarded passive heatsink for the GPU. Originally I put a fan on the GPU but at times it seemed to run hotter with it on. So I took it off. The CPU then has a fan tied directly to the 12v rail so its at high speed all the time. The MoBo did a bad job at controlling it. Because my case is a long narrow case, I have 2 fans at the back also that blows the air out. So basically there is no way to build up heat. On max load the CPU runs at 35 degrees. The GPU runs a bit hotter at 43 degrees max load.

    Here is a pic with the case off.


    Nirwana Project, the Android/Win 7 hybrid system!

    1X Ainol Novo Flame Tab
    4X MK808b
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