Heat wave here in So. Cal... Ouch. I had to aim my fan at my cable modem just to read this board; it drops my connection when it gets too hot!

My 300TD was converted to r134a at the end of last summer... The AC didn't work at all for years before that, and it wasn't very hot in October so the conversion seemed fine to me. And it is... if you're sitting in the front seats, and the temperature doesn't get above 85.

Yesterday and today made me decide I need to do something to improve the AC - either convert back to r12 or do some kind of upgrade (or both).

Searching the board, I found plenty of references to r134 -> r12 (re)conversions. I also found lots of talk on upgrades (bigger compressors, parallel flow condensers, better fans) but nothing apparently concrete on that subject (nothing from anyone that's actually tried it).

Parallel flow condensers and a better fan sounds like a worthwhile upgrade. Leathermang was talking about doing it in this thread:
Increasing Air Conditioner Reserve Capacity ?

Does anyone know how that went? Can you use a parallel flow condenser with an r12 system (it sounds like they're just meant for r134, but I hope that's not true; it would be nice to have the advantages of both!).

Anyone have any thoughts/comments/advice on this matter?

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'81 300TD Wagon 355k (Miss Diesel)
'83 300SD 180k
'84 500SEL 190k (Parting it out)