RE: Help! R134 is the pits (hope you're not too sick of this topic!)

["Fry, Larry" <LEF@chem-tronics.com>]

Curt-  I do know this: R134 isn't nearly as effective as the old R12 and
systems designed for 134 have much more capacity.  Simply replacing R12 with
R134 will reduce the capacity of your R12 system.  That said, my '87
recently had its system recharged with R134, and on a six-hour run from
Arizona to San Diego in 106 degree heat with AC on, the coolant temp gage
never went completely above the light.  Just about, but not completely.  The
AC output was....well, it was adequate.

I read, several years ago, that a modern automobile AC system designed for
R134 would, if charged with R12, be adequate for a small house.  

Larry  sandiego16V

-----Original Message-----
From: Curt Voss [mailto:curtv@eudoramail.com]
Sent: Wednesday, October 03, 2001 10:45 AM
To: scirocco-l@scirocco.org
Subject: Help! R134 is the pits (hope you're not too sick of this
topic!)


Once again with the R134 stuff... I'm sorry if this topic is getting old. I
converted two cars last weekend: an '86, and an '82 that I swapped an '86
a/c system into. I drove the '82 to work on Monday and the '86 on Tuesday.
It got up to about 100 degrees each day, and in the afternoon both of them
were running really hot cruising down the freeway at 65 mph in 5th gear with
the a/c on. Not hot enough to activate temp lights but enough to ping when I
stepped on the gas.  The a/c's were barely cooling, I'd guess the output
from the vents was around 70-80 degrees. almost useless. Turn the a/c off,
and temp gauges dropped to normal in a few minutes. This morning I drove the
'82 in with the a/c on all the way - darn near froze myself and had no
overheating problems whatsoever. So it appears that I can only use the a/c
as long when I don't need it... :D

Seems like I've seen a number of posts from people who have converted and
have been happy with it... can anyone think of anything I might have done
wrong that would cause this? In the '82 I replaced all the seals, compressor
oil, and receiver/dryer; for the '86 I used the Autozone kit with the
oil/o-ring conditioner that you don't have to open the system to do. I
charged both up in my driveway with the cheapo Autozone kit. The low- and
high-side system pressures in the '82 were in high end of the ranges listed
on the generic spec sheet that came with the kit. I could only check the low
side on the '86, it was also in the high end of the range. I didn't pay much
attention to the amount of refrigerant I used since I was measuring the
pressure with a gauge, but best I recall I used about 2-1/2 cans in each.

Help! Or is R134 just not feasible when it hits 100?

---
'86 Scirocco 8V, soon to be sold
'82 Scirocco 1.8 8v - the daily driver
'81 Caddy
'78 Rabbit 1.7L rustbucket in semi-retirement
'86 Celica GTS
'02 PT Cruiser - the wife's boat


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