ac change over
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
ac change over
i seen a 134a change over kit at napa .it has the 134a charge and a fluid that makes the oil that is in there compatible with new 134a . plus the new valves .anyone try this kit .
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
"...and I used a 90° fitting on the VIR..."
Duh! I used to be a ultra-cold refrigeration technician and designer, so why didn't I think of that?! It'll make things so much easier! Thanks!
I charge my system (1977 EEVIR) with R409a. It's compatable with the existing oil (for R-12--both use POE)--dump the R-12, pull a vacuum, and add the R409a. I've been using it for 3 years.
I have glass tops and (yesterday for instance) I had 42F air coming out of the vents--it was 85F outside and in the direct, midday sun. Needless to say, the cabin temperature was frosty.
[
Duh! I used to be a ultra-cold refrigeration technician and designer, so why didn't I think of that?! It'll make things so much easier! Thanks!
I charge my system (1977 EEVIR) with R409a. It's compatable with the existing oil (for R-12--both use POE)--dump the R-12, pull a vacuum, and add the R409a. I've been using it for 3 years.
I have glass tops and (yesterday for instance) I had 42F air coming out of the vents--it was 85F outside and in the direct, midday sun. Needless to say, the cabin temperature was frosty.
[
Last edited by PhotoVette1; Apr 22, 2005 at 08:14 AM.
Drifting
Joined: Jul 2004
Posts: 1,360
Likes: 0
From: COVINGTON LA
I am currently an industrial refrigeration mechanic, and I work for myself. I work on Ammonia systems, Natural gas, all the Halocarbons and Florocarbons (Freon). I converted mine to Hot Shot which is 409B I think but I would check that there are so many it's hard to keep track, I have a chart in my truck but it's not here. It worked great, before it barley cooled and I have a brand new compressor, accumulator, orafice tube, evaporator, and spal fans. Now it will freeze your nu*s off. 
I forgot to mention it is a direct drop in, no oil change, orafice change, just evacuate system and charge with Hot Shot, be sure and turn the drum or can upside down to charge liquid, it is a teranary blend and if you charge gas you may not get the right chemical compositon. When charging liquid, barely crack your gauges like 10 to 15 psi above the operating suction pressure, you don't want to slug the compressor with liquid.
I forgot to mention it is a direct drop in, no oil change, orafice change, just evacuate system and charge with Hot Shot, be sure and turn the drum or can upside down to charge liquid, it is a teranary blend and if you charge gas you may not get the right chemical compositon. When charging liquid, barely crack your gauges like 10 to 15 psi above the operating suction pressure, you don't want to slug the compressor with liquid.
Last edited by ICEMAN59; Apr 22, 2005 at 09:07 AM.
Pro
Joined: Sep 2003
Posts: 511
Likes: 4
From: Phoenix AZ
Originally Posted by PhotoVette1
Hot Shot is R414b. It works extremely well with oriface type, but not so well in the VIR type of system--I tried both.
What would be needed to change from 134a to R414b?
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Racer
Joined: Apr 2001
Posts: 309
Likes: 5
From: La Crosse,WI,USA
Vir?
What is the difference between a VIR and an Orfice? I am thinking of installing a factory air box in mine with a newer style Compressor? What sort of advise do you guys have as I am starting from scratch. I have a 1975 unit to put in my 71 W/O Factory Air. I was going to get one of the new serpertine belts set ups from Summit that includes an A/C compressor.
Any advise?
Thanks,
Charlie
Any advise?
Thanks,
Charlie