I'm getting these numbers with r-134a done with a standard conversion
kit (i.e. just hose fittings, gas, and lubricant).  When my system was
evacuated with R-12, my A/C shop mentioned that he had used
propane/butane (ES-12? Or something like it?) based refrigerants with
good result.  I'm not sure what 406 is but it's probably used for other
industrial applications.

I've done two R-134a conversions now: one on my acura integra, and my
'91 GL.  Both are working great.  And given the $40 dollars in parts and
the labour to evacuate the system, it has really been worth the
changeover, especially in this Washington DC heat.

wade

-----Original Message-----
From: Ron McLean [mailto:ronalanmclean@yahoo.com]
Sent: Sunday, August 11, 2002 9:42 AM
To: Wade Shen; vanagon@GERRY.VANAGON.COM
Subject: Re: A/C Performance in '91 GL

> I'm getting about 32-39 degree differential from
>outside air on fan speed three, and full cold on the
>dial with a bottom out temp of about 40F.

These numbers are quite interesting, but I am not
familiar with the other numbers.

What is:
ES-12?
R-406a?
R-12?

Ron
89 Syncro Westy GL

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