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Old 07-06-2006, 03:03 PM
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Join Date: Feb 2006
Location: upland,ca
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air conditioning compressor upgrade

A friend just gave me a new Sanden air conditioning compressor. I have a 1970 250c with a 4 speed and an old aftermarket ARA air conditioner. The old york style compressor draws a lot of power and heats up the engine.I am hoping to upgrade the system with the new compressor and need a little help determining if it will work and any other pieces that I need to replace. The current system uses R12 and the new compressor uses R134. How do I tell if the new compressor is the right size? What kind of dryer should I use? What size pulley should I put on the compressor? Do I need to change anything inside the car?

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Old 07-07-2006, 12:01 AM
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Location: Dallas
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Compressors are gas agnostic. If it is an old Sanden it was designed for r12. Stick with R12 its cheap again and the components of the a/c system were sized for r12. 134 is a false economy. You would have to change the fittings if you went 134 too. A properly working R12 setup will work better.

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