Alright posting some of my trial and error with the AC system.
1999 GMC Suburban 1500 5.7 with rear AC
- Everything replaced, I mean everything
- Sanden style UAC Compressor
- Evaporators front and rear
- Parallel Flow Condenser
- Hoses front to Rear (Auto Cooling Solutions for the Rear)
- Orifice tube Currently installed - Red 0.062
- R152 - Approx. 24 ounces maybe a little more
- HD Clutch
- 11 Blade fan
This is how it currently sits, and by far the coldest, I've been able to get it. It's now comfortable to drive in the TX heat, at least 85-90 right now in the morning. If I try to put more R152 in the low pressure shoots up well over 75-80, I assume this is from the chosen Orifice tube, as High stays roughly steady around 200 or less.
Items to Install
- OEM Condenser Electric fan
- "blanket" for the Accumulator
- Accumulator Pressure switch
I've considered the Smaller pulley Compressor but it makes me wonder if it will do anything as flowing more Refrigerant is going to be limited by the Pressure Devices, Orifice tube and TXV. I know there is a lot of Knowledge here, my background is in Mercedes Benz vehicles, but of course I work on my own stuff.
1999 GMC Suburban 1500 5.7 with rear AC
- Everything replaced, I mean everything
- Sanden style UAC Compressor
- Evaporators front and rear
- Parallel Flow Condenser
- Hoses front to Rear (Auto Cooling Solutions for the Rear)
- Orifice tube Currently installed - Red 0.062
- R152 - Approx. 24 ounces maybe a little more
- HD Clutch
- 11 Blade fan
This is how it currently sits, and by far the coldest, I've been able to get it. It's now comfortable to drive in the TX heat, at least 85-90 right now in the morning. If I try to put more R152 in the low pressure shoots up well over 75-80, I assume this is from the chosen Orifice tube, as High stays roughly steady around 200 or less.
Items to Install
- OEM Condenser Electric fan
- "blanket" for the Accumulator
- Accumulator Pressure switch
I've considered the Smaller pulley Compressor but it makes me wonder if it will do anything as flowing more Refrigerant is going to be limited by the Pressure Devices, Orifice tube and TXV. I know there is a lot of Knowledge here, my background is in Mercedes Benz vehicles, but of course I work on my own stuff.