134a conversion, High and Low pressure readings

[Kneale Brownson]

Or you can buy a kit to convert R-12 fittings to the R-134 for under $20.

At 10:21 AM 7/12/2005 -0700, Patrick Austin wrote:
>Eric
>
>Harbor freight has the R134 guages on
>sale for $49.00.
>
>Pat
>Kirkland, WA
>
>-----Original Message-----
>From: quattro-bounces+tm2=zipcon.net at audifans.com
>[mailto:quattro-bounces+tm2=zipcon.net at audifans.com]On Behalf Of
>Huppert, Eric
>Sent: Tuesday, July 12, 2005 8:31 AM
>To: 'quattro at audifans.com'
>Subject: 134a conversion, High and Low pressure readings
>
>
>Gentlemen,
>
>Difficult patient: 90 Audi 200TQ
>
>After numerous issues with the AC system I'm getting fairly close to cold
>air, versus cooler air!
>
>Of course I only have R12 gauges, and have had fairly little luck finding a
>134 pressure chart similar to the R12 charts which were relatively common
>back when I was turning a wrench for a living. And my vacuum pump will only
>pull about 28", which I know isn't really enough...
>
>System calls for 1000 grams R12. All the info I've found on 12 to 134
>conversion states start with 70-80% 134. Charged with two cans, apx 680g and
>high side is over 250lbs (above idle) Ambient temperature was apx 85F...
>Press seems high? Vent temp was around 50F.... As for low pressure, need to
>get 134 adapter to hook up to low port!
>
>Thoughts, guesstimates on apx hi/low pressure figures????
>
>Thanks, Eric
>
>
>
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