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Unread 02-28-2011, 06:52 PM   #1
fedx95
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A/C Conversion R134 to R414 "Hot Shot"

Hey,
I have had no A/C in my XJ after the accident. I have the A/C lines ready to be dropped in, and I was wondering. Theres a bunch of articles for converting old R12 systems to R134 or R414b, which is also known as hot shot, and is similar to R12, except its cheap like r134. I was wondering if I could fill my already R134 system with R414b. I live in Miami, and im perspiring even in the "Winter".

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Unread 02-28-2011, 07:14 PM   #2
fedx95
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and for that matter, that Enviro-Safe 12a, if anyone has used that on their r134 system
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Unread 02-28-2011, 07:26 PM   #3
djb383
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To do the a/c properly, the evap/cond need to be flushed, new dryer and orifice tube installed (both are filters), oil drained from compressor and correct amount of oil (year specific) added back to system. A vacuum must be pulled (to remove air/moisture) and correct amount of freon added (year specific). Best to have a pro pull a vacuum/add freon unless u have a vacuum pump and a/c gauge/manifold and the knowledge to use them.
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Unread 02-28-2011, 07:35 PM   #4
fedx95
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I'm looking more for a response concerning the type of refrigerant used. I could just fill it with R134 but from what I've read, 12a and R414 is better, and they are direct replacements for R12. My question is, is it a direct replacement for R134
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Unread 02-28-2011, 07:49 PM   #5
djb383
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My ? is, unless u have a permit/certificate, where can u get any refrigerant, other than r134a? Thought I saw r414 was only available in Canada, could be wrong, have been before.
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Unread 02-28-2011, 09:17 PM   #6
AZ Jeff
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Your vehicle came filled with R134a. That means all the components were sized to deal with that refrigerant. A PROPERLY WORKING R134a system should be able to cool your XJ, even in Miami. My XJ does just fine here in AZ, where the sun and maximum temperatures are higher than where you live.

Owing to all of the above, I see no reason to deviate from the factory refrigerant and begin experimenting with stuff that may or may not work with the OEM parts.
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Unread 03-01-2011, 07:13 AM   #7
tb007
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I don't quite know how to word this... but if the 414 is closer to the old r12 it will work better (r134a is less efficient than r12, it's also more prone to leakage because of the size of the molecule)... but there should be no reason to switch if the ac is working properly... unless you just want to fudge around with it, which i can understand.
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Unread 03-01-2011, 07:57 AM   #8
Rmart30
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FREEZONE is discussed in a lot of forums as a replacement for 134 and is supposed to be about 30% more efficient

I have never used it myself but it does sound tempting to try......link below

http://befreetech.com/envirosafe.htm
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Unread 03-01-2011, 10:04 AM   #9
djb383
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Tumors on testicles! Yikes! Did a partial a/c overhaul last summer on our XJ, 34F at the center vents using R134a.
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Unread 03-01-2011, 10:08 AM   #10
djb383
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Quote:
Originally Posted by AZ Jeff View Post
........My XJ does just fine here in AZ, where the sun and maximum temperatures are higher than where you live.......
.......but your's is a dry heat, the OP's heat comes with high tide 24/7/365.
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Unread 03-01-2011, 03:41 PM   #11
fedx95
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humidity is like, 70% on a good day now. When summer comes round, im screwed. high 90s with like 100% humidity sucks
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Unread 03-01-2011, 04:56 PM   #12
djb383
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I lived on the Gulf Coast, south of Houston for 25 years........u reeeaaalllyyy need a good a/c system. Sorry, I can't help any with regard to those other types of refrigerants.....just don't know anything about 'em, where to get 'em. Are those other refrigerants only available on the Internet?

I've read/heard the stories about R134a not being as efficient as R12 BUT, several years ago, I converted a '90 Chevy P/U from R12 to R134a and it would freeze your butt off, after the conversion. I did have a professional pull a vacuum and charge the system, after I did the conversion. Again, after overhauling the XJ a/c this past June, we see 34F at the center vents (R134a).
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Unread 03-01-2011, 05:22 PM   #13
fedx95
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http://www.es-refrigerants.com/produ...rant&Trying=ON

$6 for 6oz of the 12a. I have not sourced out R414 yet. They say it's a direct replacement, so, I might just go for it, unless anyone else has tried it and had bad experiences
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Unread 03-01-2011, 06:05 PM   #14
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Hey man, sorry for the Off Topic, but where in Miami are you? I am also in Miami (Doral).

As for the A/C, I know what you mean about the humidity here in Miami. Mine cools nicely, but on hot days I have to move the lever all the way to setting 4 and move all the vents towards me.
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Unread 03-01-2011, 07:10 PM   #15
djb383
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Quote:
Originally Posted by fedx95 View Post
http://www.es-refrigerants.com/produ...rant&Trying=ON

$6 for 6oz of the 12a. I have not sourced out R414 yet. They say it's a direct replacement, so, I might just go for it, unless anyone else has tried it and had bad experiences
Are u set up with the vacuum pump and manifold/gauges?
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