A/C basics
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
A/C basics
I've read just about everything I can find here about C3 A/C systems. The equipment in my 77 works at the moment (sort of), but I'm planning to upgrade the compressor with a Sanden unit, change out the evaporator and condenser with newer parts, and convert to R134a. I've done repairs on a few other autmotive A/C systems in the past without problems, and I have the equipment to do all the work, but the variety of A/C systems used in the C3s has me more than a bit confused.
My 77 shop manual says that the EEVIR system with the POA valve was still used on the 77 Corvettes. Should I rip it all out and convert to the later cycling clutch-type system? What evaporator and condenser to I need to work best with R134a? What fittings do I need to get the Sanden compressor working with the rest of my equipment? Am I going to lose my mind?
Anyone who knows these systems and the upgrades involved, please help me out here.
My 77 shop manual says that the EEVIR system with the POA valve was still used on the 77 Corvettes. Should I rip it all out and convert to the later cycling clutch-type system? What evaporator and condenser to I need to work best with R134a? What fittings do I need to get the Sanden compressor working with the rest of my equipment? Am I going to lose my mind?
Anyone who knows these systems and the upgrades involved, please help me out here.
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
I simply purchased replacement parts for my system, replaced my O-Rings with the green ones, and modified a hose so I can fill with Ester oil and R-134a.
If you want to do the conversion with a kit then Eckler's has what you need.
Here's a page with the VIR Eliminator kit:
http://www.ecklers.com/product.asp?p...dept%5Fid=1183
If you want to do the conversion with a kit then Eckler's has what you need.
Here's a page with the VIR Eliminator kit:
http://www.ecklers.com/product.asp?p...dept%5Fid=1183
Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
The TXV is a better system it has a broader control range. They will out perform an orifice system. Although I have herd good things about the variable orifice tube. The TXV systems do have their down falls like plugging and sticking.
Neal
Neal
Racer
Joined: Aug 2000
Posts: 364
Likes: 3
From: Van Wert Ohio
For what it's worth,I just finished the Sanden conversion on my '79 which is orfice tube system. I used the stock evap and condensor and purchased the compressor and bracket from Hot Rod Air. I replaced the accumulator and orfice tube and purchased custom hoses. It turned out terrific. It's really cold and the Sanden is quiet and doesn't take much power. I really recommend the Sanden.
Check the Hot Rod Air website and you might also call Hot Rod Air for some advice if you plan on using their stuff. I talked to Wayne and he knows this stuff in and out.
Good Luck!
Check the Hot Rod Air website and you might also call Hot Rod Air for some advice if you plan on using their stuff. I talked to Wayne and he knows this stuff in and out.
Good Luck!
