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Technical Vintage air problem

Discussion in 'The Hokey Ass Message Board' started by Marlar, Aug 13, 2019.

  1. Marlar
    Joined: Jul 9, 2019
    Posts: 5

    Marlar

    Hi all, I’m new here. I am looking for some ideas on what could be going on with my new vintage air system. Was working well for a week . Yesterday the engine died couple times, realized when compressor kicks on it kills the engine. I replaced the compressor with same problem. Also the blower is not blowing correctly. Only blows on one speed with the switch turned off. It is a 1962 bel air with ramjet 350 and gm R4 pancake type compressor. Any ideas are welcomed! Thanks
     
  2. olscrounger
    Joined: Feb 23, 2008
    Posts: 3,418

    olscrounger
    ALLIANCE MEMBER

    When it dies is the compressor locked up? Too much refrigerant? Sometimes the blower will go on low when the switch goes from normal to off-go up again on blower then off. Do you have a trinary switch installed? Without and too much refrigerant it will lock up.
     
  3. gimpyshotrods
    Joined: May 20, 2009
    Posts: 15,986

    gimpyshotrods
    Member

    Anything in there to bump up the idle, when the compressor kicks on?
     
  4. TrailerTrashToo
    Joined: Jun 20, 2018
    Posts: 325

    TrailerTrashToo
    Member

    olscrounger is correct on the trinary switch. Have you checked the running pressures with guages? If you do not know the high side and low side pressures, everything is a guess.

    >> "Only blows on one speed with the switch turned off." What switch, the binary switch, the fan speed switch or the function select switch (OFF/HEAT/COOL/DEFROST)? Maybe give us some more information, i.e. is this a cool only unit, or heat/cool or heat/cool/defrost?
     
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  5. Marlar
    Joined: Jul 9, 2019
    Posts: 5

    Marlar

    After it kills the engine you can start back up and runs fine until it cycles back on then kill it again. The compressor seems fine not locked up.

    I believe it is a binary switch as it only has two leads going to it.

    I charged it with 1.8 lbs per the instructions.

    I raised rpm and still stumbled badly.

    I will get some gauges on it today and report back .
     
  6. flatheadpete
    Joined: Oct 29, 2003
    Posts: 9,365

    flatheadpete
    Member
    from Burton, MI

  7. Hnstray
    Joined: Aug 23, 2009
    Posts: 10,419

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    Please do not take offense at the following comment. When you say the “compressor seems fine, not locked up”.......what are you basing that on? If you mean the compressor belt pulley turns by hand that can be the case even if the compressor is locked internally. The reason being, the belt pulley is attached to the clutch......which is likely not engaged when you are turning the compressor by hand.

    Ray
     
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  8. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 22,403

    Jalopy Joker
    Member

  9. Marlar
    Joined: Jul 9, 2019
    Posts: 5

    Marlar

    The pressures with it running with ac on is 23 on low side, 270 on high side

    With compressor off I can turn by hand and make it compress not just turning the belt pulley. It only kills the engine about half the time when engaging. When is bogs down but keeps running, the clutch is engaged and ac working.
     
  10. saltflats
    Joined: Aug 14, 2007
    Posts: 9,283

    saltflats
    Member
    from Missouri

    How hot is it outside with these pressures?
     
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  11. Marlar
    Joined: Jul 9, 2019
    Posts: 5

    Marlar

  12. saltflats
    Joined: Aug 14, 2007
    Posts: 9,283

    saltflats
    Member
    from Missouri

    Sounds like it could use more cooling for the condenser.
     
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  13. sunbeam
    Joined: Oct 22, 2010
    Posts: 4,047

    sunbeam
    Member

    Did a vintage air in a 61 chevy used the unit that used the orginal controls went through several computers before they got it right.
     
  14. Marlar
    Joined: Jul 9, 2019
    Posts: 5

    Marlar

    This is the second computer...
     
  15. TrailerTrashToo
    Joined: Jun 20, 2018
    Posts: 325

    TrailerTrashToo
    Member

    Correct.
    2019 07 08 Final assembly.jpg
    I simply ran out of space. There are 2 Summit 8" fans on the condenser. The large vertical coil spring is for the hood (flips forward) - not visible in this picture is the ghetto fabrication needed to move the coil spring (needed to make room for the electric fans). The cold air intake, for the carb, is on the left side of the picture. In front of the coil spring is the #6 hose going from the condenser to the receiver/dryer.

    EDIT: This is an example of 10 pounds of stuff in a 3.5 pound sack...
     
  16. Joe H
    Joined: Feb 10, 2008
    Posts: 734

    Joe H
    Member

    Pull the fans back away from the condenser and add a shroud from fans to condensers. You are only cooling about 60% of the condenser, everything around them is getting no air flow when not moving. High side pressure is to high for 83 degrees outside temp. Try cooling the condenser with water while watching the gauges, if the high side comes way down and you get decent cooling, air flow is the problem. Look at Vintage Air's remote mount condenser, you will see how the shroud and fan should be mounted. 03143-VUC.jpg
     
  17. AngleDrive
    Joined: Mar 9, 2006
    Posts: 637

    AngleDrive
    ALLIANCE MEMBER
    from Florida

    How about more horsepower:D.....................couldn't resist.
     
  18. I had a problems with my Vintage Air and I keep chasing my tail, then it occurred to me go to the horses mouth. HRP

    Technical support: tech@vintageair.com
     
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  19. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 7,372

    mgtstumpy
    Member

    AC idle solenoid increrases RPM when AC compressor is engaged, specifically at idle AC idle solenoid to increase RPM.JPG
     
    Hnstray likes this.
  20. OLDSMAN
    Joined: Jul 20, 2006
    Posts: 1,758

    OLDSMAN
    Member

    Yes contact vintage air’s tech department. They are very knowledgeable and will help you out
     
    firstinsteele likes this.

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