 Swamp (?) A/C cooling idea - would it work and for how long? |
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| perrysan |
 Nov 30 2022, 02:03 PM
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Rob Perry  Group: Members Posts: 29 Joined: 3-November 10 From: Roanoke, VA USA Member No.: 12,353 Region Association: MidAtlantic Region  |
Years ago at a swap meet I picked up the under-dash AC unit for my 914, and the stubby center console to go along with it. I ended up putting it in storage because I but didn't want to sacrifice the horsepower to the A/C compressor,. For me most drives are spirited but generally 30 minutes to an hour.
This got me thinking about an alternative approach that would involve placing a medium sized chest cooler in the frunk (large enough to hold a couple bags of ice or chill pack equivalents) and plumbing the lines from the under dash unit to the frunk into cooler, adding a boat sump pump tied to the A/C blower fan, and using a chilled water approach to getting coolant to the under dash unit. My question to the group is has anyone tried this and would ~40 quarts of icy water provide much cooling for very long? I know I should just bite the bullet and get the classic auto air upgraded compressor... |
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| Steve |
Nov 30 2022, 02:37 PM
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914 Guru Group: Members Posts: 5,857 Joined: 14-June 03 From: Laguna Niguel, CA Member No.: 822 Region Association: Southern California 
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Been done many times, but usually an ice chest with a fan in front of the passenger seat. Does work until the ice melts. Modern rotary compressors do not use much hp, so I wouldn’t waste my time with ice.
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| Jamie |
Nov 30 2022, 02:52 PM
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#3
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Senior Member Group: Members Posts: 1,102 Joined: 13-October 04 From: Georgetown,KY Member No.: 2,939 Region Association: South East States
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QUOTE(Steve @ Nov 30 2022, 12:37 PM)  Been done many times, but usually an ice chest with a fan in front of the passenger seat. Does work until the ice melts. Modern rotary compressors do not use much hp, so I wouldn’t waste my time with ice. And you would be adding water vapor to an all ready to rust vehicle! (IMG:style_emoticons/default/shades.gif) |
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| perrysan |
Nov 30 2022, 04:59 PM
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#4
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Rob Perry Group: Members Posts: 29 Joined: 3-November 10 From: Roanoke, VA USA Member No.: 12,353 Region Association: MidAtlantic Region |
QUOTE(Jamie @ Nov 30 2022, 03:52 PM) QUOTE(Steve @ Nov 30 2022, 12:37 PM) Been done many times, but usually an ice chest with a fan in front of the passenger seat. Does work until the ice melts. Modern rotary compressors do not use much hp, so I wouldn’t waste my time with ice. And you would be adding water vapor to an all ready to rust vehicle! (IMG:style_emoticons/default/shades.gif) Just to clarify what I'm proposing would be a semi-closed system - the chilled water would flow from the ice chest to the under dash A/C unit and back. You would only open it up to refill ice or drain the water out. But to your point I should revisit a rotary compressor solution. Thanks! -Perrysan |
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| friethmiller |
Nov 30 2022, 05:26 PM
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#5
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Senior Member Group: Members Posts: 874 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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I installed the Classic Auto Air kit into my '74 914. I did modify mine to mount the compressor on top of the engine, though. I can confirm that the hp loss from a modern compressor is minimal. When it's 100+ degrees down here in August, it's super nice having the A/C cranking away - cooling you down. With that said, installing it took many hours. However, I did have help from others here on the forum - namely dlee6204. If interested check out his A/C thread:
http://www.914world.com/bbs2/index.php?sho...192917&st=0 |
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