Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: Dingmaster]
#1518017
10/16/13 12:47 PM
10/16/13 12:47 PM
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Joined: Feb 2005
Posts: 174 Creedmoor, NC, USA
74Charger
member
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member
Joined: Feb 2005
Posts: 174
Creedmoor, NC, USA
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I considered it, but did not do it. Instead i took my old EPR valve apoart, cleaned it, and got it working as it should. Manual says they are not serviceable. My previous experience with 134-A conversion was a result in capacity loss, so I was less than impressed with conversion results. My question for Classic Air would be, "Can an old-style RV-2 compressor clutch tolerate the cycling presented by the line t-stat?" In the original configuration the EPR valve prevented the evaporator pressure from getting too low. This is the purpose of the t-stat Classic Air sells. EPR valves are no longer available from the dealer in my area, and I have a reliable and knowledgeable MOPAR parts contact. If you do the 134-A conversion, I hope you are satisfied.
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: Dingmaster]
#1518020
10/16/13 02:32 PM
10/16/13 02:32 PM
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Joined: Jan 2003
Posts: 3,719 Space Station #5
471Magnum
master
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master
Joined: Jan 2003
Posts: 3,719
Space Station #5
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EPR should be removed and a thermostatic cycling switch installed.
That being said, RV2 compressors really weren't designed to have their clutch cycled.
Installing a Sanden-type compressor is really the best way to go.
-Jim
I can fix it... my old man is a television repairman. He's got the ultimate set of tools... I can fix it.
Currently Mopar-less
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: 471Magnum]
#1518021
10/16/13 03:17 PM
10/16/13 03:17 PM
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Joined: Apr 2007
Posts: 2,936 Calgary, Alberta Canada
a12rag
master
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master
Joined: Apr 2007
Posts: 2,936
Calgary, Alberta Canada
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On my 70 Sport Satellite, I got Classic Air to redo my lines and provide a new evaporator and heater core. I used a local shop to vacuum test and then fill the system. I asked them about the EPR valve, and they said, no, it should be ok. After getting the car back from them, on some of the hottest days we had (close to 35deg C = 90deg F), the system worked flawlessly - freezer cold !!!
As was posted before, a B body ac/heater unit takes a lot to rebuild and get back into the car. It was much easier to install, while the complete dash was out of the car !!! . . . pretty much figure I have 50 hours in that unit under the dash !!! . . .
Good luck with your car . . .
Cheers,
Mark
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: 471Magnum]
#1518022
10/16/13 03:40 PM
10/16/13 03:40 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Quote:
EPR should be removed and a thermostatic cycling switch installed.
That being said, RV2 compressors really weren't designed to have their clutch cycled.
Installing a Sanden-type compressor is really the best way to go.
A cycling AC thermo clutch switch....that makes sense without the EPR valve. I agree about the old Mopar RV2 comp as it takes a small V/8 to run the thing. They would really drag the idle down on my old 318 Scamp as it had no idle solenoid on that model and they would not help the gas milage. Newer style comp much better. Ron
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: 383man]
#1518023
10/16/13 06:24 PM
10/16/13 06:24 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Got an AC license so I'll keep R12 in my 65 Cuda. Never was impressed with the R134 conversion in my 87 Diplomat, yeah the outlet temps read 38ish but it never seemed to cool down like the R12 did.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: Supercuda]
#1518024
10/18/13 10:14 AM
10/18/13 10:14 AM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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Quote:
Got an AC license so I'll keep R12 in my 65 Cuda. Never was impressed with the R134 conversion in my 87 Diplomat, yeah the outlet temps read 38ish but it never seemed to cool down like the R12 did.
Spoiler alert: Thread theft in progress. What about putting new style compressor onto system and retaining R-12? Is that possibile? I have a horde of R-12. I am calling Classic today to ask them but I would appreicate any feedback from here. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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Re: Anyone convert A/C to R134 by deleting EPR valve?
[Re: 62maxwgn]
#1518026
10/18/13 05:58 PM
10/18/13 05:58 PM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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Quote:
R12 in this,just change compressor oil,no problems,and don't let Classic Air rip you off for a cycling switch !!
http://www.bpeusa.com/BPEac_cycling_switch.asp
I like that better. Keeps the double pulley.
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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