Ac help on the conversion

[dcw88]

Hi all I got the factory AC on my 69 satellite. The compressor works still but I want to upgrade to the the r134a gas. Which is the low side and high side on my system. I attached a photo in hope people can assist me

 

[diesel_lv]

Before you do any vacuum or charging, change our the condenser for a parallel flow one designed for 134. Will make a difference.

 

[dcw88]

Before you do any vacuum or charging, change our the condenser for a parallel flow one designed for 134. Will make a difference.

Thanks for that I was wondering where the new connectors as I am confused where the low side and high side goes

 

[Billccm]

I believe high connection is the condenser.

 

[493 Mike]

High side is compressed gas/condensed liquid. Low side is suction after X-valve thru evaporator coil to compressor inlet. Do some research on this conversion, I removed the EPR valve from the compressor and added a thermostat to control the compressor clutch. It must be cycled to control evaporator temperature or freeze up will occur.
Mike

 

[dcw88]

Have I got this right the high side at the front and the low side at the back

 

[493 Mike]

Have I got this right the high side at the front and the low side at the back

View attachment 1660738

Since the compressor reduces the volume of the gas it can be transported in a smaller line than the suction side. Did you forget Boyle's Law from school?
Mike

 

[66/440]

High side = smaller hoses/lines
Low side = larger hoses/lines

To get satisfactory cooling with 134a a multi-pass condenser is highly recommended as mentioned by diesel_lv. 493 Mike also has a good suggestion regarding adding a thermostat. There are quite a few threads regarding AC conversions that have lots of good advice i.e.

Can I ask for some A/C help advice/opinions please...

I recently installed the Classic Auto Air underhood conversion kit : 72 Charger/72-74 Barracuda A/C Performance Upgrade Kit Big Block STAGE-2 My car is a 72 Satellite 400 car with factory A/C but I wanted the Sanden Style compressor and High Efficiency condenser etc... for a few reasons...

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