134A not less efficient than R12, was RE: HVAC diagram

[David.Ullrich at ferguson.com]

Anybody know the Audi part number AND York part numbers for the compressor on my 1987 Coupe GT? I want to call/write/e-mail York and ask them about their thoughts on conversion from R12 to R134a. I'm beginning to think my mechanic didn't know what he was talking about when he said that the system would cool fine with R134a. I strongly voiced my concerns and of course he came back with the fact that he's done hundreds of conversions and never had a problem and said it would be fine. He also claimed to have called the dealer and asked them. I'm beginning to doubt him, which sucks because he's been really good to me so far...

Dave

1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
1998 VW Passat GLS 1.8T - For Sale CHEAP




-----Original Message-----
From: Dave Pisciotta [mailto:dave_pisciotta at hotmail.com]
Sent: Thursday, April 18, 2002 10:16 AM
To: jonboyer at hotmail.com; David Ullrich - 0018 HQ; quattro at audifans.com
Subject: 134A not less efficient than R12, was RE: HVAC diagram


The following was clipped from www.griffiths.com  I have found it to be a
good resource.

"Is R134a less efficient than R12 ?
R134a is NOT less efficient than R12. Actually R134a is more efficient.
Pound for pound R134a is a more efficient refrigerant than R12. Whether
R134a performs as well as R12 in any given a/c system depends upon system
components and the amount of R134a used. Given two identical vehicles, each
with the same weighted amount of refrigerant, the vehicle with the R134a has
the "capability" to remove more heat (measured in btu's) from the vehicle
than the same type of vehicle using the same amount of R12. The most common
influences which effect the capability of R134a to perform well are the
condenser, the superheat setting of the expansion valve or the amount of
R134a. Condensers designed to release greater amounts of heat help evacuate
the greater amount of heat which R134a removes from the car's interior. And
by "matching" the correct amount of R134a to use in a given vehicle,
correcting the superheat of the expansion valve, you can in the same manner
balance or match the amount of heat drawn out by the evaporator and released
by the condenser. These efforts to "balance" the system can not be realized
if there are problems within the a/c system, such as: poor performing
compressor, dirty condenser or poor air flow through the condenser,
malfunctioning expansion valve, water or air in the system, improperly
operating fresh air or heat input in the climate-air mixing system. "

_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx