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Technical Salvage Yard Air Conditioning ? ? ?

Discussion in 'The Hokey Ass Message Board' started by Russ V., Jun 23, 2014.

  1. napalmv8
    Joined: May 18, 2013
    Posts: 39

    napalmv8
    Member

    Underdash evaporator unit seem to be the best solution. But is it possible to use modern AC compressor (designed for r134) with old R12 units?
     
  2. Already answered previously; usually yes.
     
  3. Yes, i have this exact setup in my COE. A 60's underdash evap unit, designed for R-12, with a Sanden compressor and operating with R-134a. Sure the expansion valve in the evap is set for -12 and not 100% optimum for R-134a, but it blows cold just fine. Sure is nice driving across the desert to Bonneville.

    BTW, the compressor can use R-134a instead of R-12, just make sure the oil used is compatible with the refrigerant type. the compressor does not have to be a new R-134a unit.
     
  4. recycling is the way to go! $299 is cheap but not as much fun as adapting old parts kinda like "hot rodding"!:cool:
     
  5. ago
    Joined: Oct 12, 2005
    Posts: 2,199

    ago
    Member
    from pgh. pa.

    You got that right, and the $12 unit from boneyard looks identical to one that Southern air sells.


    Ago
     
  6. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,260

    Gman0046
    Member

    The junk yard is exactly where a Southern Air Unit belongs. Pure garbage including the funky looking control panel. Vintage Air is the ONLY way to go. They've been in business for decades and have great tech support. Does anyone think for one minute that Southern Air manufactures the units they sell? Vintage Air manufactures the units they sell. Nuff said.
     
    Last edited: Jun 26, 2014
    Merlin likes this.
  7. Cosmo49
    Joined: Jan 15, 2007
    Posts: 1,268

    Cosmo49
    Member

    If Vintage Air MAKES the Southern Air units and they are junk, how is Vintage Air the only way to go!?
     
    FlynBrian likes this.
  8. Bigchuck
    Joined: Oct 23, 2007
    Posts: 1,142

    Bigchuck
    Member
    from Austin, TX

    Most of the "drop in" R-12 reeplacement refrigerants contain flamable gas. Which could cause issues if a leak came into contact with a spark, or fire-smoking in a car with a leak.
     
  9. ebfabman
    Joined: Mar 10, 2009
    Posts: 675

    ebfabman

    Vintage air is made up of readily available components. I just repaired a vintage air system that had a leak in the evaporator. When I called vintage air tech, I was told the the unit was not serviceable because it was a sealed unit and it would have to be replaced. I removed the unit, split the case, found the leak, repaired it, and put the unit back together. After the repairs I wanted to replace the expansion valve and receiver/dryer before a final leak check and evacuation. I called vintage air once again and was told they could not help with parts information. A little time on the net provided the OE vehicles that the parts fit. The expansion valve fit Hondas and the dryer fit Acuras. The local auto part had both. After all repairs and proper charge the unit blows 38 degrees from the center vent. This was no less work than repairing a retro fit junk yard system and the junk yard setup would be a LOT less money.
     

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  10. treb11
    Joined: Jan 21, 2006
    Posts: 3,684

    treb11
    ALLIANCE MEMBER

    You know they are two different companies, right?

    posted via smoke signals made with a Mexican blanket
     
  11. mike in tucson
    Joined: Aug 11, 2005
    Posts: 502

    mike in tucson
    Member
    from Tucson

    Back in the early 70's, there were quite a handful of auto air conditioner companies located on Harry Hines Blvd in Dallas. You could buy an "in dash" retrofit unit for something like $160-$190; they were decent units. I used to do driveway installs of these, I was slow since I did unthinkable stuff like really cutting round holes in the firewall for the hoses....the "pro" installers used a pointed 2"x2" wood stake and punched the holes in the firewall. My installation career ended when I agreed to do an install for a girl's 73 Pinto in exchange for sex......I got screwed on that (more ways than one) since it took the entire weekend to install the danged unit. There is NO room under a Pinto dash!
     
  12. jbrittonjr
    Joined: Sep 10, 2009
    Posts: 105

    jbrittonjr
    Member

    In 1986 or so I used a VW rabbit or Jetta HVAC plenum in one of my F-1 cabs. I think the compressor was out of a mid 80's chevrolet and the condenser was from the VW. The A/C hose fittings didn't match but I grafted hoses together with steel pipe and hose clamps. If I had to do it today I'd be looking at similar small cars for donor parts.
     
  13. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,635

    Atwater Mike
    ALLIANCE MEMBER

    I recall those aftermarket units, installed a couple (not more than that! Talk about getting screwed..)
    My shop was full of street roadsters and old time drag cars at the time, and always Porsches.
    A very sly 'Porsche Pilot' (female, and she had all the 'toys') had me do a big service on her 356 SC, came to pick it up, brought a bottle of vintage wine.
    She asked about my 'private office' upstairs, so I locked up and we settled in on my big leather couch.
    We laid out flat, (you know, just to see who was taller...) Later, after cigarettes (I smoked a little back then) she asked if I was going to 'adjust' her bill.
    I said, "Consider it done!" and bounced down the stairs, adding on $50.00 for 'additional services'!

    She was incensed, but I told her I never 'go in the hole for my money'.
    True story. She remained a customer, but the Ball Games were over.
    "For the love of Mike" LOL
     
    Flipper and fourspeedwagon like this.
  14. ago
    Joined: Oct 12, 2005
    Posts: 2,199

    ago
    Member
    from pgh. pa.

    From the above post it seems Vintage Air wants to just sell you a new unit. Auto A/c is not that complicated. around $850 for a new unit, I think junkyard A/C.


    Ago
     
  15. Russ V.
    Joined: Oct 13, 2009
    Posts: 277

    Russ V.
    Member

    Based on some of your great comments, I went out yesterday afternoon and removed the rear reciever/heater/blower unit from a '94 Suburban. This unit is not compact, but is very easy to remove. It has only one duct opening for shooting hot or cold air to the vents in the Suburban overhead. It appears to be well designed, but because the hoses and A/C lines point straight down, does not really lend itself to underdash installation. (Rotating the unit to re-orient the tubes and hoses would not work under the dash.)

    Since I have only parking meter money and an hour invested, there is no waste if I decide to use something else....but, it appears that the Suburban rear unit might work OK in the trunk of my shoebox. Last pic shows the unit sitting in the trunk of my '50 coupe. Stay tuned.

    (And keep the comments, experienced reports coming!!) Would appreciate a wiring diagram for this unit if someone knows this sort of stuff and how it works.

    LATE NOTE: I recieved my Haynes Techbook: Automotive Air Conditioning And Heating.. #10425 this is a great resource for gaining an understanding of the A/C processes, tools, procedures, etc. $20 and free shipping got the job done.
     

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    Last edited: Jun 29, 2014
  16. napalmv8
    Joined: May 18, 2013
    Posts: 39

    napalmv8
    Member

    Btw, is there need to increase engine throttle during idle while AC is ON? And if yes, are there some bolt-on solutions?
     
  17. ago
    Joined: Oct 12, 2005
    Posts: 2,199

    ago
    Member
    from pgh. pa.

    The units out of the conversion van and some roof units out of Suburban I have do not look like that. photos later.


    Ago
     
  18. Oldb
    Joined: Apr 25, 2010
    Posts: 218

    Oldb
    Member

    I had a instructor at a a/c class correct me one time. He said you are not making cold air, but removing heat from the air. I have heard that several times over the years. For what it is worth.

    B
     
  19. ago
    Joined: Oct 12, 2005
    Posts: 2,199

    ago
    Member
    from pgh. pa.

    This is the unit I took out of conversion van! $12

    Ago

    Ago[/QUOTE]
     

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  20. whtbaron
    Joined: Sep 12, 2012
    Posts: 573

    whtbaron
    Member
    from manitoba

    Stay away from the Neon's when you're looking for a compressor. Some of them were built from metal that was too porous for modern refrigerants. Then again, staying away from Neons when junkyard shopping is probably good advice anyway.
     
  21. falconsprint63
    Joined: May 17, 2007
    Posts: 2,359

    falconsprint63
    Member
    from Mayberry

    [/QUOTE]
    I think that's the same one I have.

    Posted using the Full Custom H.A.M.B. App!
     
  22. great idea to trunk mount the unit!
     
  23. daddio211
    Joined: Aug 26, 2008
    Posts: 6,002

    daddio211
    Member

    Ask @da34guy about trunk mounting. He tried it a few years back and it didn't work well at all. Can't remember the specifics, but it ended up being a waste of time and money.

    Posted using the Full Custom H.A.M.B. App!
     
  24. Merlin
    Joined: Apr 9, 2005
    Posts: 2,546

    Merlin
    Member
    from Inman, SC

    They don't Southern air is Chinese made.
     
  25. If Southern Air is made in China then why do the say Made in USA? southern air.jpg
     
  26. GrandPaJohn
    Joined: Aug 10, 2012
    Posts: 4

    GrandPaJohn
    Member

    Has anyone used the A/C from Gem Street Rod?
     
  27. wsdad
    Joined: Dec 31, 2005
    Posts: 1,258

    wsdad
    Member

    Not so with R414b. According to the MSDS sheet, Hot Shot is not flammable:

    Flammable Properties:
    Flash Point: No flash point Flammable Limits in Air (% by volume)
    Flammable Limits in Air (% by volume) LEL: NONE (per ASTM E681)
    Autoignition: 635ºC (1175ºF) UEL: NONE (per ASTM E681)
    Fire and Explosion Hazards:
    Cylinders may rupture under elevated temperatures and/or fire conditions. In concentrations above the recommended
    exposure limit, open flame will vary in size and color. Eliminate the flame or ignition source and ventilate to disperse
    the refrigerant vapors.
    Hot Shot is not flammable at atmospheric pressure and temperatures below 100ºC (212ºF). Hot Shot should not exist
    with air/excess oxygen at elevated pressures and high temperatures. Hot Shot can become combustible with combinations
    of elevated temperatures, pressures, and oxygen, and an ignition source.
    For example: Do not mix Hot Shot with air under pressure for leak detection purposes.
     
  28. stimpy
    Joined: Apr 16, 2006
    Posts: 3,547

    stimpy


    Yes , Gm used a solenoid that attached to the carb that was wired to the compressor circuit when the compressor turned on it pushed out a adjustable piece it looked exactly like the idle stop solenoid but on the front of the carb linkage , the GM BOPC cars had them in the 1970's its called a A/C fast idle servo , but you can buy a kit from Holley or edelbrock that includes the brackets( FAst idle solenoid)
     
  29. stimpy
    Joined: Apr 16, 2006
    Posts: 3,547

    stimpy


    and Pt cruisers as its the same driveline , wife had problems with hers loosing refridgerant all the time till they worked on it at the dealer . ( compressor and hoses were replaced )
     
  30. stimpy
    Joined: Apr 16, 2006
    Posts: 3,547

    stimpy

    was he pulling the air from the trunk or pulling it from the cabin ?? as the trunk would be excessively hot as they are not insulated like the cabin is , also I think I would want to pull the air from the cabin as the trunk could see some Co infiltration from the exhaust
     

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