Mark, thank you for your reply.  I considered R134a.  However, after looking
at the Sanden website, comments on the list, and other websites, I made the
choice for Freeze-12.  Since I was not present when conversion was done, I
am not sure of pressure readings.  Also, I am not sure that I am getting the
correct heat transfer across the evaporator coil.  I have found ice on one
of the lines from the compressor even with a hot engine compartment, so I
know that things are working well on that end.  I have not measured temps
out of the rearward facing registers.  Things may be cooler back there.
Main problem is that my van is out in the hot sun all day.  Then I have to
pick up my 2-year old from daycare.  This week, I have been keeping the
windows open during the day.  This gives me faster cool downs.

John Lauterbach
Macon, GA

----- Original Message -----
From: Mark B. Magee <condor2@flash.net>
To: John Lauterbach <jhlauterbach@email.msn.com>
Cc: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 20, 2000 7:34 PM
Subject: Re: A/C performance with Freeze-12

> John, Volks,
> I did the same (equipment changes) and went from R-12 to R134a and on the
day of
> installation it was 92F outside blowing 47F at the front most vent on the
air
> tube. R-134a -truly- is the best gas to sub for R-12. Idling or going down
the
> freeway, it's really cold inside, -really- hot outside.
> It is routinely over 100F daily presently and the Carats interior in the
heat of
> the say is so cold, my wife carries blankets for our 10 month old! And my
two
> young boys complain of the cold! I just freeze 'em out however.
> Regards
> Mark Magee                                90 Carat
> Kemah TX
> John 14:6
>
> John Lauterbach wrote:
>
> > This is for an '84.  Air temp (measured by thermometer in outlet above
> > driver's right eye) is running about 28 Fahrenheit degrees below outside
> > temperature.  Is this about normal?  When I leave for work in the
morning,
> > outside temp is around 75F and outlet temp is in high 40s.  When I leave
> > work, outside temp is near 100.  After driving about 10 miles, outlet
> > temperature is in high 60s.  New A/C compressor, drier, and expansion
valve.
> > Refrigerant load is four (4) twelve (12) ounce cans.
> >
> > John Lauterbach
> > Macon, GA
>
>
>