20V A/C PERFORMANCE

[Porsray@aol.com]

I havve seen a lot of mail about people asking if their A/C systems are
working
OK.  For the heck of it, I ran the following test yesterday:

Ambient temps:  85 Deg F, about 50% rel. humid., bright sunny in Pittsburgh,
                         late afternoon.  Car parked in sun for approx. 30
minutes 
                         beforehand.
Settings:            System in "AUTO", temp setting = 75 Deg F.  Windows
closed,
                         had sunroof open in "tilt" mode for approx. 5
minutes to purge
                         hot air. 

Results:             After approx. 15 minutes, system seemed to stabilize
(fan 
                         cut back to approx LO or next speed above) with
center duct
                         air temp approx. 36 Deg F. Initially, I got
impression system
                         went to full-bore cooling (max. fan speed and
recirc. door
                         opened to admit just internal air), then backed
down.  This was
                          with car moving above approx. 20 MPH in clear
traffic; at lights,
                          discharge temp climed toward approx. mid-40's.

Hope this helps.  Car is a '90 Coupe Quattro with 119,000 miles; has been 
recharged twice, outside temp sensor replaced once, connector to condenser
fan replaced, otherwise HVAC hasn't been touched.

Ray Calvo (porsray@aol.com)