[urq] [s-cars] Good news for R12 A/C people

[Cody Forbes]

Well over $100.

-Cody Forbes (mobile)

On Jul 9, 2013, at 12:22 PM, Dave Brown <hoog23 at aol.com> wrote:

> H'mm   Is a 30lb tank of r12 still worth anything?
> 
> Thanks,
> 
> Dave
> 
> 
> 
> -----Original Message-----
> From: djdawson2 <djdawson2 at aol.com>
> To: urq <urq at audifans.com>; s-car-list <s-car-list at audifans.com>
> Sent: Sun, Jul 7, 2013 10:45 pm
> Subject: [s-cars] Good news for R12 A/C people
> 
> 
> 
> 
> 
> Always been a quandary what to do with R12 cars as the refrigerant becomes less 
> available and more expensive.
> 
> I've never been a fan of converting R12 systems to R134... the pressure set 
> points on the R12 system compressors and the phase change points for the R134 
> refrigerant are not optimally compatible, leading to less than great performance 
> overall.  On top of that you have to go through the exercise and expense of 
> changing out all your o-rings and attempting to purge all of the system's 
> non-compatible oil, sometimes hoses, etc...
> 
> In the past, a drop-in replacement has been a product called Autofrost, also 
> known as R406A.  I've used this product over the years, and it performed quite 
> well.  Additionally, it could be used to top off a low charge situation without 
> removing the old R12.
> 
> I recently depleted my remaining supply of the R406A, and when I attempted to 
> order another cylinder, I found that it was no longer available.  The supplier 
> advised that I try RS24, also known as R426A.
> 
> I had just received my cylinder of RS24 when a fellow lister (Justin Riley) 
> needed some help with the A/C in his freshly renovated '85 urq.  He had just 
> replaced his receiver/dryer and compressor.  We evacuated his system for about 
> an hour, and then charged it with the RS24.  Very quickly we were seeing vent 
> temps in the 33-37 degree range, depending on engine speed (a little more speed 
> = colder).
> 
> Bottom line - impressive, and a viable alternative to those with R12 cars.
> 
> You can read up on RS24 - but here are some highlights:
> 
> - You can NOT top off a low R12 system with the RS24.  It must be completely 
> evacuated and recharged.  Very strongly recommended that you replace the 
> receiver/dryer when doing this
> - You do not have to worry about oil compatibility
> 
> You can go here  http://www.rscool.com/RS-24.html ; to see the product charts, 
> MSDS, etc..  Also available is a pressure chart which shows performance side by 
> side of R12, R134, and RS24... clearly indicating why the RS24 is a far superior 
> solution to converting to R134.
> 
> Anyway... thought this might be interesting to folks like me - with a garage 
> full of R12 cars.
> 
> Dave
> 
> 
> 
> 
> 
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