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freeze 12

any of you guys used this stuff as a R12 replacement. I know a lot of you don't have A/C but its pretty tough in Phoenix with out it.
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Old 10-07-2011, 06:14 AM
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1991 c2 turbo black black

austin texas just has 90+ days over 100

envirosafe industrial - 2 cans + A/C vacuum + hard wired the condenser fan to be on high

my A/C rocked all summer

39 degrees if starting from shade or on Hwy

Hot car still takes a while to cool BUT the A/C blows cold right off

envirosafe is flammable But then ...so is Gas
Old 10-07-2011, 07:11 AM
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Using similar for years 10+. Works great. Installed it in over 50 cars. Never a problem.
I use redtek or duracool. Walmart sells it.
No problems.
Old 10-07-2011, 07:35 AM
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you can buy real r12 on ebay after taking a 15min online certification class or informing the seller you are buying it for resale.

http://www.epatest.com/
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Old 10-07-2011, 07:45 AM
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i got some freeze 12 today from a friend who has a repair shop. the supplier said they are no longer making it. i met a guy in line that goes to mexico and buys r12 buy the case for cheap but i guess its not legal in the us? i am going to charge the system tomorrow and i will post my results.
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Old 10-07-2011, 07:05 PM
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well i replaced all the lines this week and pumped it up with freeze 12. it works good. the temp got down to 56 sitting in my garage. outside temp was in the mid 80's. i don't have a compressor to vacuum out the system so i have just bled off maybe 1 can to try and get as much as air out as possible.
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Old 10-08-2011, 07:04 PM
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auto zone has A/C vacuum & manifold gauge set
leave credit card deposit and get it back when you return the set
Old 10-09-2011, 04:26 AM
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i tried oreillys yesterday with no luck, if you guys think its of value to vacuum it down i can hit auto zone today.
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Old 10-09-2011, 06:42 AM
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Well,
Most R12 sub do not need a Vacuum. But i still do it. Chech with the manufactures for the reason or a suggestion. If you get around 56 with no air going through the A/C system i would think you are good to go.
Old 10-09-2011, 07:21 AM
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ran down to auto zone and picked up one, vacuuming as i type, i will post results to see if it gets colder
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Old 10-09-2011, 11:59 AM
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so, we charged it up, high side pressure was way to high, almost 300. it now is only cooling down to 65 at idle. took it for a drive and as soon as we start going it stops cooling? it just blows warm
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Old 10-09-2011, 01:01 PM
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so i need a experts help. We increased the RPM to 2000 and the high side drops so we put more freeze 12 in. right now we have about 18oz in there. i know that is a lot less then whats is to be in there but the at 2000 rpm the high side was up to 275. so the weird part is when i drive it after i am at about 3000rpm the air blows warm, if i bring the rpm back down it cools down again? what are missing here? i am thinking that maybe the higher pressure may be a result of the lines that i had custom made are smaller in diameter then the stock ones. not a huge difference but noticeably smaller
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Old 10-09-2011, 02:15 PM
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oh and the outside temp is about 85, and i can get the thing down to 58 not moving.
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Old 10-09-2011, 03:03 PM
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This is probably too simple to be your problem (higher RPM blowing warm) but is it possible that the compressor belt is slipping at 3K and beyond?
Old 10-09-2011, 03:19 PM
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thats a good thought, its not making any noises and its pretty tight, but i will check that. one thing is strange. we charged it the first time at idle, got the temp down to like 56. drove it and as soon as i hit anything above 2K it went hot. re read some posts and some POrsche instructions and it said to charge at 2K RPM. the higher the RPM the lower the pressure on the high side. we got another maybe 4 oz in it until the high side was around 275? then drove it and we thought we had it solved until i hit 3K rpm. then just blows hot? one other thing i had to do was pull out most all of that nasty insulation that is in the smugglers box around the valve. could that be causing me a issue? or maybe the valve that is in there is stuck? Very frustrating! again though we have maybe half of the recommended freon in it! so maybe we need more? but the pressure seems to high!
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Old 10-09-2011, 06:54 PM
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18 0z's is not very much. you need to find out if the compressor is cutting off while driving or sitting still. if you have a low pressure switch, that will turn off the comp if the low side is too low. there should also be a temp sensor that has a bulb that goes into the evaporator, if that is not working properly, that may give you some problems, but you need to figure out if the comp is on or off and if off, why.
also when charging, it is good to idle up a bit, also turn the AC fan on hi and recirculate. you also need airflow over the condensors. when i charge my brothers, i put a box fan on the rear deck lid, you could also put one in front.
i never saw where you posted the low side, what is it?
911's will usually have higher high sides, especially sitting still.

all systems need to have a vacuum pulled before charging. for one thing, it will make the pressures higher, and its not just a matter of air, its moisture. when you pull a vacuum, the vacuum boils off moisture in the system, that is also why there is a dryer, to help get rid of moisture.

feeze12 is just a blend of several other refridgerants, surprisingly enough, 134a is one of them, i think the highest content, but dont hold me to it, its been a while since i looked all that up.

i had to look it up.
75% 134a and 25% 142b, about.
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Last edited by T77911S; 10-11-2011 at 07:52 AM..
Old 10-11-2011, 07:48 AM
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