Your RX7 uses a block type TXV, so the low side switch can keep things from operating when it it either too cold outside, or the system is severely undercharged. Both of those conditions can keep oil from returning to the compressor. An adjustable low pressure switch will do what you want. You can s...

Yes. you should add a high pressure cutout to the clutch circuit. Blowing the relief valve is something to avoid, and the switch does that. Since you are plumbing fresh anyway, it is not a big job. Supercool has always been good product Here is a PAG test I did years ago... https://www.autoacforum.c...

I strongly recommend you pull the compressor to do any control valve swap. Cleanliness is very important at that point. You want to clean the road grime off of the case around the valve assembly before you start. Once you pull the snap ring, clean thigs again before you pull the valve out. Dropping ...

Bear in mind that A19 has never actually fixed an A/C system himself. He has a lot of opinions about things he has never actually touched.

I have used lots of BVA 100 over the years as well. Including use in R4 compressors here in the desert. And the wing cell compressors as well...

The vehicle the compressor came from has a 2 wire plug. Inside the clutch is a diode ACROSS the coil windings. Wired properly, it shunts the reverse current from the magnetic field in the clutch when power is removed. If you ground the wrong wire from the clutch, the first time you energize it - you...

Too much oil (or a really tight compressor) could cause a high torque issue at startup - which would cause the belt tension to go sky high & bang the tensioner stop.

If the clutch itself is actually making a banging noise, it is not right. So yes, swap it out before it does something worse.

Yeah, you will need to host the photo someplace else to post it on here. I have seen some ludicrous FMIC installations over the years here - with posters wondering why the A/C no longer works. With any sort of changes to the heat exchanger stack, it is always good to make sure the fan is pulling air...

If you are putting in a huge intercooler, you will need to be sure that the condenser airflow is not compromised. Using a larger condenser is a good plan, because of the increased air temperature at the face. Plenty of choices out there. CTS Cadillac condenser has been a good swap for me a few times...

I don't think I would charge an empty, unknown system. I would be inclined to pull the compressor & see if it has any oil in it. I know it is an E series, and a pain to work on. Perhaps pull the accumulator & check it for oil? Some of those vans had scroll compressors, others had the FS10 pi...

Just another kid with a sanden catalog , Tim. Interesting that one vendor caused the Original Poster so much trouble though. Supplied an inadequate compressor for a car that big, AND a "custom" defective evaporator. And the only way the OP got the the bottom of it was coming here - for free.