POA valve or Eliminator?

Discussion in 'The Big Chill' started by Flint Rex, Aug 28, 2019.

  1. Flint Rex

    Flint Rex Member

    I'm converting my 70 Wildcat to R143. I can either have my stock Frigidaire POA valve re adjusted for R134, or put in a POA valve eliminator with pressure switch that turns it into a cycling compressor system like more modern cars. I seem to remember someone telling me that the A6 compressors don't respond well to a lot of cycling. Any thoughts? Anyone have any experience after converting?
     
  2. 455monte

    455monte Well-Known Member

    I recalibrated my poa on my 67 and used 134a
    Car blows 37 degrees.
    Ive also heard that a6 compressors were not designed to cycle.
     
  3. Golden Oldie 65

    Golden Oldie 65 Well-Known Member

    Yup, I tried one of those cycling switches on mine. Junk.
     
  4. Dr. Roger

    Dr. Roger Stock enthusiast

    X3. Shouldn't use a cycle switch with an A6. Updating the POA is $250 compared to the $100 POA eliminator kit, but you need to use a modern compressor with the cycle switch.
     
  5. Flint Rex

    Flint Rex Member

    Thank you all for sharing your experiences! I'll go with the POA rebuild. Did any of you use the original hoses, or have them redone with barrier hose?
     
  6. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Has anyone had a good experience with the POA update kit from Old Air? I bought one but haven't installed it yet.
    Flint Rex, I plan to use standard barrier hose so I can re use my original fittings.
    I rebuilt my A6 compressor and plan to use it too.
     
  7. 455monte

    455monte Well-Known Member

    Everything on mine is original gm except the expansion valve and all new orings.
    I do believe the hoses weep over a long period of time a small amount of 134 freon .
    But for 5 bucks a can at wally it gets 1 can approx every 1.5 years
    Just easier than going back and changing all the hoses
     
  8. Dr. Roger

    Dr. Roger Stock enthusiast

    Yep, the word on the streets is the r134a leaks through the old r12 hoses and requires occasional recharging. No problem since the stuff is cheaper than beer. Often, you end up having to replace one or more hoses due to their age and cracks/damage. If you have to replace any, you might as well get 134a hoses.
     
  9. Dr. Roger

    Dr. Roger Stock enthusiast

    I think the POA update kit is the same as the POA eliminator. It just cycles the compressor on and off to keep the system from freezing up. It will work with an A6, but the A6 really wasn't designed to shift on and off all the time, so the compressor's lifespan will likely be reduced.
     
  10. telriv

    telriv Well-Known Member

    Not so much the compressor but the clutch which is easily replaced.
     
  11. pbr400

    pbr400 68GS400

    I know the A6 was used until about 1980 (had a ‘78 Caddy and ‘79 Pontiac with it); didn’t those systems cycle? I know they didn’t have POAs.
    Patrick
     
  12. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Yes. Jaguar used them in the 80's as well.
     
  13. BennyK81

    BennyK81 Well-Known Member

    My 79 Fleetwood had an A6 and it did cycle.

    And yes it died on the german autobahn going about 70mph
     
  14. richopp

    richopp Well-Known Member

    POA is the way to go. My '66 was the year BEFORE the POA design was available. Talked to a local shop owner who worked for Harrison back then and he told me the POA cars were MUCH better than other ways of doing it. Also told me that back then they begged them not to destroy the machine/tooling that made the diaphragms, but they did. He feels today's repros are not as strong as the originals, FYI.

    Cheers!
     
  15. jamyers

    jamyers 2 gallons of fun

    POA all the way!!! If your POA works with R12, you can recalibrate it yourself with an air compressor and a hex wrench. Specific instructions are over at www.ackits.com's forums (or were several years ago they were...)
     

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