Welcome to the Corvette Forums at the Corvette Action Center!

90-AC Convert R12 to R134

ringleader

Active member
Joined
Aug 12, 2002
Messages
36
Location
los angeles, ca USA
Corvette
1990 Black coupe
:beer Has anybody changed their earlier Vette to R134? If so does it get reasonably cold and have you encountered any other problems? Any input would be appreciated before Thursday 1/11/07. Thanks
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
I have never done a vette but have converted a number of other GM cars, all built in the 80s. They all turned out quite well. I even had an 82 Grand Am that was colder than with the R12. The amount of R134A you put in is critical. You might consider using a diff. orfice such as one for a Ford or the new self adjusting ,which I found at NAPA. There are threads on this from last summer.


Glenn
:w
 

ringleader

Active member
Joined
Aug 12, 2002
Messages
36
Location
los angeles, ca USA
Corvette
1990 Black coupe
Thanks for responding, could you explain using a diff orfice and the self adjusting, and how would I determine what the right amount would be?
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
By weight use 80% of what it calls for on R1. The orfice is int the low pressure line at a connection, usually close to the evaporator. The orfice controls the amount of flow. I am not sure how the self adjusting ones work and never used one but they have been suggested as a very good option.
http://www.corvetteactioncenter.com/forums/showthread.php?t=2397&highlight=R134a

This is a thread that discusses the conversion.

http://www.corvetteactioncenter.com/forums/showthread.php?t=66637&highlight=R134a

another.

Glenn
:w
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Parts/Accessories:

Vetteskins

Advertise with the Corvette Action Center!

Double Your Chances!

Partners

Top Bottom