Stock A/C vs. Vintage Air
07-05-2019, 04:40 PM
#21
I would check to see if the hot water valve is working. If the hoses are hot , then the valve is clogged or not closing all the way. If the Compressor is kicking off it may be a sign that not enough air is passing through the condenser.
I'm getting between 42 degrees and 46 degrees from all the vents with the Vintage Air.
I slid some Lowes boiler insulation between the unit and firewall it helped .
I'm getting between 42 degrees and 46 degrees from all the vents with the Vintage Air.
I slid some Lowes boiler insulation between the unit and firewall it helped .
I put a manual shut off valve in my 79, and it helped a lot.
07-05-2019, 06:19 PM
#24
I'd be more than glad to pay for a V/A or other aftermarket AC to replace my current system but nobody seems to have a complete kit to fit the 1977-1982 Corvettes.
Here's hoping somebody 'proves me wrong' by posting a company that doews make a system to work on the cars I mentioned.
Here's hoping somebody 'proves me wrong' by posting a company that doews make a system to work on the cars I mentioned.
07-06-2019, 11:26 AM
#25
Burning Brakes
I'd be more than glad to pay for a V/A or other aftermarket AC to replace my current system but nobody seems to have a complete kit to fit the 1977-1982 Corvettes.
Here's hoping somebody 'proves me wrong' by posting a company that doews make a system to work on the cars I mentioned.
Here's hoping somebody 'proves me wrong' by posting a company that doews make a system to work on the cars I mentioned.
https://www.digitalcorvettes.com/for...d.php?t=248905
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American Raven (07-07-2019)
07-06-2019, 12:45 PM
#26
Race Director
My friend did his 76 with Vintage Air, his controls look like the picture.
He said the key was using Vacuum Cleaner hoses from a shop vac which fit behind the console. He is no longer with us or I would ask him for the details.
He said the key was using Vacuum Cleaner hoses from a shop vac which fit behind the console. He is no longer with us or I would ask him for the details.
The following users liked this post:
American Raven (07-07-2019)
07-06-2019, 01:45 PM
#27
Safety Car
I too am getting ready to tackle my A/C system repair on my '73 C3 soon...
I'm not getting much flow through the HVAC plenum once it exits the evaporator. (Seems to be OK to that point)
Hoping one of the blend doors is stuck closed or inactive for what ever reason... but it apppears to be
a difficult repair at best.
Is there a good diagram for the under dash system that anyone has found?
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
I'd also like to get away from the stock compressor and use something later model but am concerned about
fitment and line up issues with existing belts/pullies...
Also, I despise those rotary HVAC controls but not sure what other options are available.
Any comments or tips would be appreciated.
Thx mardyn
I'm not getting much flow through the HVAC plenum once it exits the evaporator. (Seems to be OK to that point)
Hoping one of the blend doors is stuck closed or inactive for what ever reason... but it apppears to be
a difficult repair at best.
Is there a good diagram for the under dash system that anyone has found?
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
I'd also like to get away from the stock compressor and use something later model but am concerned about
fitment and line up issues with existing belts/pullies...
Also, I despise those rotary HVAC controls but not sure what other options are available.
Any comments or tips would be appreciated.
Thx mardyn
Last edited by mardyn; 07-06-2019 at 01:47 PM.
07-09-2019, 06:55 AM
#29
Drifting
I too am getting ready to tackle my A/C system repair on my '73 C3 soon..
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
Thx mardyn
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
Thx mardyn
07-09-2019, 01:10 PM
#30
mardyn
See here.... I read about it before but a 1" plastic cutting board is and easy thing to cut up and make a spacer from.... I do not have any experience with this since I have Hot Rod Air, but I ran into this article when reviewing A/C system issues.
https://www.corvetteforum.com/forums...tall-info.html
See here.... I read about it before but a 1" plastic cutting board is and easy thing to cut up and make a spacer from.... I do not have any experience with this since I have Hot Rod Air, but I ran into this article when reviewing A/C system issues.
https://www.corvetteforum.com/forums...tall-info.html
I too am getting ready to tackle my A/C system repair on my '73 C3 soon...
I'm not getting much flow through the HVAC plenum once it exits the evaporator. (Seems to be OK to that point)
Hoping one of the blend doors is stuck closed or inactive for what ever reason... but it apppears to be
a difficult repair at best.
Is there a good diagram for the under dash system that anyone has found?
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
I'd also like to get away from the stock compressor and use something later model but am concerned about
fitment and line up issues with existing belts/pullies...
Also, I despise those rotary HVAC controls but not sure what other options are available.
Any comments or tips would be appreciated.
Thx mardyn
I'm not getting much flow through the HVAC plenum once it exits the evaporator. (Seems to be OK to that point)
Hoping one of the blend doors is stuck closed or inactive for what ever reason... but it apppears to be
a difficult repair at best.
Is there a good diagram for the under dash system that anyone has found?
Also, do I understand correctly? Use an C4 blower wheel on the C3 blower motor with a 3/8" spacer to improve
air flow by 35% to the evap? Is the spacer available for purchase or a fabricate as needed item?
I'd also like to get away from the stock compressor and use something later model but am concerned about
fitment and line up issues with existing belts/pullies...
Also, I despise those rotary HVAC controls but not sure what other options are available.
Any comments or tips would be appreciated.
Thx mardyn
Last edited by carriljc; 07-09-2019 at 01:11 PM.
07-09-2019, 07:44 PM
#31
Le Mans Master
Yeah for some reason, I can’t get the center vent temps below about 58*...sometimes when the compressor cycles off, it’ll go as high as 68*, then the compressor comes on and cools to 60 ish. It’s about 10* warmer then it should be. Compressor was pre-filled with oil, the R134 was not oil filled I don’t think. (Hopefully not). I did put some dye in it tho. We’ve adjusted the Freon level different ways. Pressures are usually 270/20 or so... sometimes higher at idle.
im wondering if the temp blend doors are doing some thing weird. Probably gonna take the car down to Vintage Air themselves and let them figure it out.
im wondering if the temp blend doors are doing some thing weird. Probably gonna take the car down to Vintage Air themselves and let them figure it out.
07-10-2019, 04:19 PM
#33
Le Mans Master
