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R-134a retrofit for OEM stock Dino A/C system: Any Interest ?

Discussion in '206/246' started by synchro, Aug 17, 2019.

  1. synchro

    synchro F1 Veteran

    Feb 14, 2005
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    Hey, been making progress.

    Three generations of Dino 246 evaporator development L to R;
    - Original OEM,
    - OEM with added R-134a fittings (in OEM case, TX valve mounted)
    - New 4 row 16 pass copper with R-134a fittings


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  2. synchro

    synchro F1 Veteran

    Feb 14, 2005
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    #27 synchro, Jun 29, 2020
    Last edited: Jun 29, 2020
    This replaces That around the drier
    Full functionality, 3 fewer sealing surfaces and 2 pressure sensor switches recalibrated for R-134a higher pressures with O-Ring seals at every port and junction. I strive to remove hose bends that disrupt refrigerant flow and add turbulence for straight line hoses that allow refrigerant to travel unimpeded through the system. The compressor has a 40% increase in CFM flow rate and the condensor has a 20% increase in heat exchange surfaces so that extra flow will be wisely used


    PS - I'm ready with all parts/tools to custom fit R-134a systems to Dinos and the first conversion candidate arrives in my garage July 15th for a Full stage 1 replacement.
    Stay tuned for a retrofit to R-134a thread. This should also help DIYs that want to evaluate if this is a task for them.

    Future A/C improvement tasks on the horizon:
    - Stage 2: Air flow rate Improvements
    - Stage 3: Adding A/C flow to existing kick panel vents

    View attachment 2965214
     

    Attached Files:

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  3. Jamie H

    Jamie H Formula 3
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    Aug 28, 2009
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    Very interesting, are you upgrading to the york/tecumseh style compressor? Very nice looking evaporator btw.

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  4. synchro

    synchro F1 Veteran

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    #29 synchro, Jul 2, 2020
    Last edited: Jul 2, 2020
    Yes, Using York for the original exterior form factor identical to OEM. They have the patents from the old York compressor company.

    BUT, my tags say it is a 1972 Aspera Frigo unit :)
    .... and OEM mounted those tags in a very visible place for Concours Judges to see.


    First client "Full install" occurs in 2 weeks, I'll get to check hose lengths and fittings on a second Dino. These cars are hand built so I'm interested to see the variations in install and how it affects selling kits
     

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  5. synchro

    synchro F1 Veteran

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    Only 6 kits remain, then production of the ten commissioned sets will be complete.
     
  6. synchro

    synchro F1 Veteran

    Feb 14, 2005
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    Stage 2 is progressing into prototyping to add a hidden SPAL 400cfm fan to the supply side.

    Here are my parts layout before I install these in Dino 06472, the complete STAGE 1 R134a conversion kit
    NOTE: OEM LABELS have been fabricated and not shown yet
     

    Attached Files:

    Jamie H, GermanDino and pshoejberg like this.
  7. Jamie H

    Jamie H Formula 3
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    Very nice work !! As usual :)

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