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

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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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

 

Very interesting, are you upgrading to the york/tecumseh style compressor? Very nice looking evaporator btw.

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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

 

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

 

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

 

Very nice work !! As usual

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Reproduction tags are finished.
Only Aspera Frigo tagged compressors are permitted
These are mounted front and top, so are somewhat visible in concours events

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Viewed from the other side


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Yes, if your client wants to re-use an old evaporator that will work also. You can modify an old evaporator by cutting the flare fitting off and brazing on a new R-134a fitting.
It is not new or clean like our remanufactured ones, but I tried it before I finally had new ones produced
Here is that prototype in front of an original

Also including TAV 39/40 for your viewing of complete system

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hello, thank you for your answer. How much does a new made one cost?
Do you have other parts we need?
we have the console and knobs for the interior, thats all we have at this point.
also need the dash piece with 3 blower holes, the non ac car has 2

Ludo

 

Sounds like your customer is open to used parts.
I have two used OEM evaporators from 1973, these are the prototypes and I no longer need them. Both are made from Copper. One with the original Flare fittings and one with flare fittings cut off then R-134a fittings brazed on. Both have rust on their side mounting plates, have not been flushed and have various fins bent/missing/soiled. Any interest in these?

Look behind the brake boooster, you may already have the 3 hole dash vent attach plate.
All Dinos that I have seen have 3 airflow vents under the dash with three tubes to attach the 80mm duct hose.
It is the dash that only has two or three holes.

Sorry, I have not even thought about individual parts pricing. I am a private party that wanted new and working A/C in Dino 05702 but got caught up having to buy tooling and pay to have parts made in a production run.

You may want to wait....
In December I am scheduling fabrication time for my new evaporator housing to pair with the new evaporator. It will fit in the OEM location exactly but will have a new fan on tyhe supply side with a max output of 400CFM to force air across the evaporator and is driven by 3 speed individual relays with auto re-setting circuit breaker protection.
The new supply fan is placed in concert with the OEM exhaust fan to solve four serious deficiencies in the OEM system:
- Overcoming the static pressure of the evaporator
- provides Fibonacci smooth scroll air delivery to full width of the evaporator face
- Increases total airflow by 40% at all 5 outlets
- removes three 90 degree bends in the ducting pathwork and their flow loss

 

Scott, I think I need one set
Now is the time for installation, dear 03724 something of originality for once, yay...
Wrote you a pm.

Regards, Alberto

 

Hello is your message for me? Ludo

 

Scott, Just sent it.

Regards, Alberto

 

Hello Ludo,

We have an extra dash piece with 3 blower holes.
Please pm so we can talk more about it.

Regards, Alberto

 

COVID has caused shortages and some crazy price increases.
Thermal eXpansion Valves (TXV) have tripled in cost, when you can find them.

 

Hello is the kit available now? does it include the blowermotor?
Wat is included in the kit?
Ludo - Netherlands