73 stingray with high AC pressure

Friendly format provided to inquire about automotive a/c systems.
Archived Forum

Moderators: bohica2xo, Tim, Dougflas, HECAT

Cgregerson
Posts: 2
Joined: Mon Feb 19, 2018 8:55 pm

73 stingray with high AC pressure

Postby Cgregerson » Mon Feb 19, 2018 9:05 pm

I have a 73 stingray and just replaced the condenser, VIR, and compressor with all new parts. Charged the system with R134 and the pressures are running very high around 400 for the high side and low pressure is running around 50. Any ideas of what may be causing this high pressure?
User avatar
Tim
Site Admin
Posts: 226
Joined: Tue Apr 12, 2016 2:19 pm
Location: Scottsdale, Arizona
Contact:

Re: 73 stingray with high AC pressure

Postby Tim » Mon Feb 19, 2018 10:03 pm

Poor condenser performance.
------------------------------
Please support ACKITS.com for your Auto A/C Parts and Tool needs.
P:602-233-0090
Cgregerson
Posts: 2
Joined: Mon Feb 19, 2018 8:55 pm

Re: 73 stingray with high AC pressure

Postby Cgregerson » Tue Feb 20, 2018 8:38 am

Tim wrote:Poor condenser performance.

Can you explain, what would cause the poor performance.
User avatar
Tim
Site Admin
Posts: 226
Joined: Tue Apr 12, 2016 2:19 pm
Location: Scottsdale, Arizona
Contact:

Re: 73 stingray with high AC pressure

Postby Tim » Tue Feb 20, 2018 9:13 am

Tube & Fin condensers will not handle the heat load of R134a refrigerant. An upgrade to a parallel flow condenser will help. Finding a direct drop for your vehicle will be difficult.
------------------------------
Please support ACKITS.com for your Auto A/C Parts and Tool needs.
P:602-233-0090
User avatar
bohica2xo
Posts: 517
Joined: Wed May 11, 2016 4:12 pm
Location: Las Vegas, NV

Re: 73 stingray with high AC pressure

Postby bohica2xo » Thu Feb 22, 2018 8:44 am

Converting a Corvette to 134a is a fools errand.

R12 is still available. Some cars just need to stay that way, and the Corvette is the best example.
User avatar
Tim
Site Admin
Posts: 226
Joined: Tue Apr 12, 2016 2:19 pm
Location: Scottsdale, Arizona
Contact:

Re: 73 stingray with high AC pressure

Postby Tim » Thu Feb 22, 2018 9:04 am

bohica2xo wrote:Converting a Corvette to 134a is a fools errand.

R12 is still available. Some cars just need to stay that way, and the Corvette is the best example.


Amen.
------------------------------
Please support ACKITS.com for your Auto A/C Parts and Tool needs.
P:602-233-0090
Dougflas
Posts: 209
Joined: Mon Apr 18, 2016 6:10 pm

Re: 73 stingray with high AC pressure

Postby Dougflas » Thu Feb 22, 2018 6:18 pm

The above is exactly correct. Spray a water hose on your condenser. If all pressures drop, you have proven what was said. Use R12 and be done with it.

Return to “Automotive Air Conditioning Forum”