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Homemade A/C, requesting thinkers.

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Old 06-18-2007, 07:26 PM
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Default Re: Homemade A/C, requesting thinkers.

I was told that car A/C systems requires a big BTU system to cool the interior enough, yet fight with the radiant heat from the windows, so i really doubt the small window AC would work lol
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Old 06-18-2007, 07:32 PM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by WTF
seriously my friend was just talking about putting a small window unit in the hatch of his integra, not sticking out but sittin in back and piping the exhaust out, and getting a decent sized inverter to run it, i think he said the smaller ones at walmart only need 500watts and you can get 1000w inverters for under $100

we talked about it for a while and it seems doable to me i was even considering it, i think it could be done for about $200 hmt style

a tiny window unit would make your car ice cold in probly a minute

im in the same boat, theres nothing left of my ac, either side of the firewall i use a spray bottle for now it helps

That is not going to work. A/C systems work by moving energy in the form of heat. The backside of the unit needs to be separated from the front. Energy moves from the front to the back of the unit. Otherwise you are simply recirculating the energy in the car and the temperature inside the car will actually rise because of the efficiency losses.




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Old 06-18-2007, 08:12 PM
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Default Re: Homemade A/C, requesting thinkers.

i figured he was gona make some kind of "mask" for the exhaust/rear of the unit and duct it out the car probly through the vent thing that lets pressure out when you slam your door

some of those units are pretty small, and they kick out enough btu's to cool a room
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Old 06-18-2007, 08:46 PM
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Default Re: Homemade A/C, requesting thinkers.

...turn your car into convertable, that'll help,

The whole A/C unit in your window, would be rediculous, the power it would take to power that damn thing, would be ungodly,

I was 10 seconds away from buying a R/V roof top mount A/C unit for my old crew cab truck. he only wanted 200 $ for it,

the Co2 idea is fine, only, there's no way to re-cool the air after going throu the evap. core, even if you could recycle it, there's no way to rebuild the pressure.

They use r-134A and r-12 for a reason .... honestly you could use propane, in your A/C, and it would work fine, if not better. the only problem is it's unstable as hell, and all it would take is one small leak..and KA-BLEWY goes your system.

i saw an old truck the other day with a metal can thing on the pass. window, that you filled with ice, and while you drive down the road, it pushes air into the ice, and re-directs the air inside.. Couldn't figure out who makes it, or where i could get one, but it was the sweatist thing i ever did see,
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Old 06-18-2007, 09:51 PM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by WTF
i figured he was gona make some kind of "mask" for the exhaust/rear of the unit and duct it out the car probly through the vent thing that lets pressure out when you slam your door

some of those units are pretty small, and they kick out enough btu's to cool a room

Ya, but rooms are insulated very well. Cars are not, plus the sunlight let's in an ungodly amount of energy.

Also, a high wattage inverter is going to be a huge draw on the electrical system. The alternator would most likely be running near 100% and the battery might not get charged enough.


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Old 06-18-2007, 10:35 PM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by 460 turbo truck

i saw an old truck the other day with a metal can thing on the pass. window, that you filled with ice, and while you drive down the road, it pushes air into the ice, and re-directs the air inside.. Couldn't figure out who makes it, or where i could get one, but it was the sweatist thing i ever did see,
its called a swamp cooler
http://cgi.ebay.com/ebaymotors/Therm...22196542QQrdZ1
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Old 06-18-2007, 11:31 PM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by MADMAX

Ya, but rooms are insulated very well. Cars are not, plus the sunlight let's in an ungodly amount of energy.

Also, a high wattage inverter is going to be a huge draw on the electrical system. The alternator would most likely be running near 100% and the battery might not get charged enough.


500w isint ungodly, and if you have a optima or somthin it really wouldnt be that bad on your system

and why the hell wouldnt a box made to cool a large insualted room cool a small uninsulated but sealed cabin off a car? i think it would work way better then normal ac possibly

im sure this stuff could be found cheaper

11"x15"x17" 5000btu cools 150sq ft $99 515w power consumption
http://www.bestbuy.com/site/olspage....=1166840116656

1200w inverter $99
http://www.harborfreight.com/cpi/cta...emnumber=93761



then just HMT some ---- make it happen

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Old 06-19-2007, 01:28 AM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by WTF
500w isint ungodly, and if you have a optima or somthin it really wouldnt be that bad on your system

and why the hell wouldnt a box made to cool a large insualted room cool a small uninsulated but sealed cabin off a car? i think it would work way better then normal ac possibly

im sure this stuff could be found cheaper

11"x15"x17" 5000btu cools 150sq ft $99 515w power consumption
http://www.bestbuy.com/site/olspage....=1166840116656

1200w inverter $99
http://www.harborfreight.com/cpi/cta...emnumber=93761

You don't get it. A larger capacity battery is only going to delay the innevitable. If the alternator is not able to keep up with the current draw and is running 100%, then there will be nothing to charge the battery. If you upgrade from a 5 gallon bucket of ---- to a 50 gallon bucket, and the ---- supply is still 10 gallons per hour of ---- less than the draw, then you will still run out. Get it?


The other issue is that at idle and most likely up to 2-3k rpms, the alternator is not going to be able to supply the needed current to even power the invertor. It will just fault out and not rununtil the available current is reached. Most honda alternators are only 60-80 amps. Not really much left over after the ignition and other stuff.



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Old 06-19-2007, 03:06 AM
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Default Re: Homemade A/C, requesting thinkers.

Just get some mysters from home depot, a fat bucket of ice water and wire that ---- up nig nog. This is HMT, dont over complicate things.
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Old 06-19-2007, 04:02 AM
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Default Re: Homemade A/C, requesting thinkers.

Originally Posted by LSD Motorsports
Just get some mysters from home depot, a fat bucket of ice water and wire that ---- up nig nog. This is HMT, dont over complicate things.
Hook it up like a horse corral? ------- tight! You would probably start a mad jdm trend. Kinda like underglow kits.
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