Great video! I'm about to buy all the parts you listed. Is there anything you need to do the the AC compressor itself? Some of the forums seem to suggest that some parts of it need retrofitting. Also, do you have a link for the o-ring kit you used?
@@homer4163 all you need to do for the compressor is drain as much as the old fluid as possible (out of the ports). You can flip it around, spin the center of the pulley, and take some time to get it out. After that, add some PAG oil into the suction port. It’ll probably hold around 4oz. When you install the compressor onto the engine, spin the center of the pulley to move some of the oil through the lines so it’s easier for the compressor to start for the first time
What size was your belt before you and sold your AC compressor from your crankshaft to your power steering pump pulley if you could please let me know that would be very appreciated thank you
@@twistiepillowzjr.9751 I’m not sure of the size, but if you look up serpentine belt on O’Reilly’s or Autozone, it’ll actually tell you “with AC and power steering” or “power steering”
Where do the connections go from the box? The wires that you showed us that was near the box and what do they connect to ? I’m trying to add ac to my miata, but my car never came with ac.
@@paulregener7016 honestly, it’s too hot for the AC to catch up. Especially if you’re not moving. The soft top lets in a lot of heat and feels like the AC isn’t doing much. That’s pretty normal in these cars
@@FloGarage I want to find a solution! I will find it and make sure everybody who ever owns these cars will finally have the coldest AC on the block. First solution I heard so far is to ditch the inefficient compressor from the NA-NB Models and build an adapter for the NC compressor. I heard the more efficient compressor changes the car completely. But I don’t have a “spare” Miata to test this.
@@VinzLopez-t3m there are some things to overcome if you want to use r-12. It’s very expensive to get because it’s not legal. You will need some way to charge the system, like a machine or gauge manifold with a vacuum pump that is for r-12. It’s a lot of work and money to keep your system R12. If you have the Freon and equipment already, go for it. Make sure your system doesn’t leak though
If i'm not mistaken, the pressure switch needs to be changed when switching from r12 to r134a. The pressure switch from 94'-97' model miatas already run r134a. If you buy the pressure switch off rockauto from those years, you will need the connector for that switch which is different from cars with a switch running r12. The connector can be found on various mazda's years 93'-96' ish and a slew of other cars, look up the part number for the new switch and read the list of compatible vehicles in order to find a car that has it. I found mine on a 96' mazda mpv van at the junk yard. From here you will just have to cut the old connector off and crimp on the new one.
Most complete and clear video on the subject i have seen so far, thanks man.
Thanks man, I have a 90 with a honda v6, but I'll be retrofitting my miata AC system to the v6 so this will help me get my bearings.
@@jv6miata heck yeah! I wish you luck!
Just curious what you're doing at 12:25. Are you doing something with the relay, or just connecting the pressure switch?
Just connecting the relay and switch to the harness and mounting the relay
Great video! I'm about to buy all the parts you listed. Is there anything you need to do the the AC compressor itself? Some of the forums seem to suggest that some parts of it need retrofitting. Also, do you have a link for the o-ring kit you used?
@@homer4163 all you need to do for the compressor is drain as much as the old fluid as possible (out of the ports). You can flip it around, spin the center of the pulley, and take some time to get it out. After that, add some PAG oil into the suction port. It’ll probably hold around 4oz. When you install the compressor onto the engine, spin the center of the pulley to move some of the oil through the lines so it’s easier for the compressor to start for the first time
@@FloGarage Thanks! So you think PAG 46 oil, or will Ester oil work as well?
PAG 46
@@FloGarage Did you have to add any additional oil to the system, or just the 4oz to the compressor?
@@homer4163 you have to add another 4oz to the system. I believe it’s 8 total. I would double check online the oil capacity
Very cool
Great video man!
What soft/hard lines did you use and which compressor?
@@dylandao4213 I used the lines that came stock with the car (R-12), and the compressor came from a donor car
@@FloGarage dope, appreciate it man!
What size was your belt before you and sold your AC compressor from your crankshaft to your power steering pump pulley if you could please let me know that would be very appreciated thank you
@@twistiepillowzjr.9751 I’m not sure of the size, but if you look up serpentine belt on O’Reilly’s or Autozone, it’ll actually tell you “with AC and power steering” or “power steering”
Where do the connections go from the box? The wires that you showed us that was near the box and what do they connect to ? I’m trying to add ac to my miata, but my car never came with ac.
Can you tell me the time of the video so I can see what you’re talking about?
Those wires go to what looks to be an evaporator temperature sensor. It attaches to the fins of the evaporator
Quick question bro! How cold does your Miata AC get in stand still traffic 100 degree + day?
@@paulregener7016 honestly, it’s too hot for the AC to catch up. Especially if you’re not moving. The soft top lets in a lot of heat and feels like the AC isn’t doing much. That’s pretty normal in these cars
@@FloGarage I want to find a solution! I will find it and make sure everybody who ever owns these cars will finally have the coldest AC on the block.
First solution I heard so far is to ditch the inefficient compressor from the NA-NB Models and build an adapter for the NC compressor. I heard the more efficient compressor changes the car completely. But I don’t have a “spare” Miata to test this.
@@paulregener7016 I wish you luck!! A hard top might help too!
I have 1992 Miata, do I just buy R12 Freon to recharge the AC?
@@VinzLopez-t3m there are some things to overcome if you want to use r-12. It’s very expensive to get because it’s not legal. You will need some way to charge the system, like a machine or gauge manifold with a vacuum pump that is for r-12. It’s a lot of work and money to keep your system R12. If you have the Freon and equipment already, go for it. Make sure your system doesn’t leak though
Nice
Why did you replace the pressure switch? Is it specific to R134a or is it because the connector is different?
@@homer4163 no reason other than it’s old. Just some preventative maintenance
If i'm not mistaken, the pressure switch needs to be changed when switching from r12 to r134a. The pressure switch from 94'-97' model miatas already run r134a. If you buy the pressure switch off rockauto from those years, you will need the connector for that switch which is different from cars with a switch running r12. The connector can be found on various mazda's years 93'-96' ish and a slew of other cars, look up the part number for the new switch and read the list of compatible vehicles in order to find a car that has it. I found mine on a 96' mazda mpv van at the junk yard. From here you will just have to cut the old connector off and crimp on the new one.
10:12
🚗