AC Compressor Upgrade
11-04-2018, 07:43 AM
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Car: '16 Camaro SS, '88 IROC
Engine: 6.2 Gen V
Transmission: 6 spd TR6060
AC Compressor Upgrade
I am upgrading my AC to a Sanden compressor and I was wondering where would I install the high pressure cycle switch. The stock location was on the back of the compressor. Would I tee it into the high side output line? If so, what fittings would I use and what switch would work?
Terry
Terry
11-04-2018, 12:47 PM
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Car: Yes
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Re: AC Compressor Upgrade
The HP sw isn't really a "cycle" thing. Strictly an over-pressure safety cutoff.
Most systems don't have one. In fact not even all of the ones in these cars do. I wouldn't worry too much about shadetree-engineering one in if there's not already a built-in spot for it.
Most systems don't have one. In fact not even all of the ones in these cars do. I wouldn't worry too much about shadetree-engineering one in if there's not already a built-in spot for it.
11-04-2018, 11:28 PM
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Re: AC Compressor Upgrade
My wife's 1987 uses a high pressure cutout switch but my 1985 just uses a high pressure valve that dumps excess pressure down to safe levels. I bought a sanden style and haven't installed it yet but it appears to have a high pressure valve built in already.
11-05-2018, 07:30 AM
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Car: '16 Camaro SS, '88 IROC
Engine: 6.2 Gen V
Transmission: 6 spd TR6060
Re: AC Compressor Upgrade
I don't think there is any high pressure switch built into my compressor, Sanden SD7. There is only one wire coming out from the clutch. I did figure out what I will do. I found a fitting that includes a binary switch that controls low and high pressure. It installs on the high side. The wire looks like it will plug right into a Sanden compressor.
Last edited by TJQIROC; 11-05-2018 at 07:33 AM.
11-05-2018, 07:34 AM
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Car: '16 Camaro SS, '88 IROC
Engine: 6.2 Gen V
Transmission: 6 spd TR6060
Re: AC Compressor Upgrade
I tried to attach a picture but it didn't work. I found this on both this site and ebay.
https://coldhose.com/switches/oring-...d-pigtail.html
https://coldhose.com/switches/oring-...d-pigtail.html
11-10-2018, 01:09 PM
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Re: AC Compressor Upgrade
Sofakindom already gave you the answer you need. The switch on the back of the R4
compressor is a OVER pressure switch. It opens its contact if the A/C line pressure
exceeds a certain (dangerous high) PSI. It has nothing to do with the A/C clutch cycling,
The actual pressure cycling switch is located on the dryer (big silver can outside the blower box).
The Sanden compresser just has a high pressure relief valve,
no switch needed. No extra wiring/engineering involved or needed.
The now defunct plug just needs a jumper in to make the system work again.
compressor is a OVER pressure switch. It opens its contact if the A/C line pressure
exceeds a certain (dangerous high) PSI. It has nothing to do with the A/C clutch cycling,
The actual pressure cycling switch is located on the dryer (big silver can outside the blower box).
The Sanden compresser just has a high pressure relief valve,
no switch needed. No extra wiring/engineering involved or needed.
The now defunct plug just needs a jumper in to make the system work again.
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