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Re-installing the A/C

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Old Apr 19, 2018 | 07:49 PM
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Default Re-installing the A/C

It's almost summer (sorta) I'm looking forward to some big car shows like Hot August Nights in Reno NV , so, The words HOT & Black Vette don't mix....
Now that the motor is in and glorious as ever, I'd like to install the A/C system BUT I don't want the old Ginormous black compressor and old steel mounts on my newly rebuilt sexy motor!

So, what is there available? I want the new system in the same place as the old but, chrome, or billet preferably ~ I see the fancy compressors on Ebay and they are nice but, I'm more worried about the brackets fitting and the belts lining up !

Any help will be appreciated especially pictures if you're running one of these setups...
Thanks
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Old Apr 19, 2018 | 08:38 PM
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Alan Grove makes brackets for just about everything. And about all combinations. Steel, but they can be plated, painted, or coated.
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Old Apr 20, 2018 | 10:20 AM
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Check out Classic Auto Air. They sell kits that include the Alan Grove brackets and a Sanden type compressor.

https://www.classicautoair.com/corve...ning_chevy_ac/

Last edited by Street Rat; Apr 20, 2018 at 10:22 AM.
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Old Apr 20, 2018 | 10:37 AM
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The A.C on 72's is several generations behind current technology, and I am assuming that originality is less important than functionality. If this is so, adding 46 year old hardware, even new repops of this hardware, is not the way to go. Both Vintage Air and Classic Air sell kits to add/replace HVAC in your 72. Each have their proponents and they each tout their system's strengths and discuss the others weaknesses. I chose Vintage Air for my application (custom installation into a 77 - a year not supported by anyone's kit) because of the support and components they offered AND because they are entirely electric (no cables and no vacuum controls - items I have had difficulties with in the GM system). I suggest that you do an ADVANCED SEARCH of this Forum to learn more about each system and which might be best for you.
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Old Apr 20, 2018 | 11:34 AM
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Vintage Air seems to be the popular choice by most people who own hot rods including Corvettes.
I'll be swapping out my OEM a/c system for a new Vintage Air system when I get that far into my resto/mod.
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Old Apr 20, 2018 | 03:03 PM
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There is a couple of really good threads on the Vintage Air system installation, with tips and pictures that is really helpful.
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Old Apr 20, 2018 | 09:33 PM
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Thanks for the help, I will check out Vintage Air.

I'm not entirely motivated to replace the whole system if I can help it, I just want a working system that doesn't include the giant compressor- I've seen the small chrome jobbies and if I can get away with one of those, plus the brackets that fit and line up correctly I'd be happy...
The air blew before my rebuild but, it wasn't cold.

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Old Apr 20, 2018 | 09:37 PM
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Originally Posted by Rotonda
The A.C on 72's is several generations behind current technology, and I am assuming that originality is less important than functionality. If this is so, adding 46 year old hardware, even new repops of this hardware, is not the way to go. Both Vintage Air and Classic Air sell kits to add/replace HVAC in your 72. Each have their proponents and they each tout their system's strengths and discuss the others weaknesses. I chose Vintage Air for my application (custom installation into a 77 - a year not supported by anyone's kit) because of the support and components they offered AND because they are entirely electric (no cables and no vacuum controls - items I have had difficulties with in the GM system). I suggest that you do an ADVANCED SEARCH of this Forum to learn more about each system and which might be best for you.
I'm way past original, all I need is good looking parts and cool air for the wife...
I will check them out but, my goal is a new compressor and mount that I can Frankenstein to the original parts (As long as it works, I'm happy)
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Old Apr 21, 2018 | 05:08 AM
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Originally Posted by pthor
I'm way past original, all I need is good looking parts and cool air for the wife...
I will check them out but, my goal is a new compressor and mount that I can Frankenstein to the original parts (As long as it works, I'm happy)
Suggest the following:
1) A Sanden 508 compressor with appropriate mounting brackets (as suggested above, Alan Grove makes good ones)
2) Find a supply of R12 refrigerant. Your system was designed for this, and it is currently loaded with the specific lubricant compatible with R12 (note that R12 was discontinued a number of years ago, and generally is no longer being manufactured). If you convert to T134a refrigerant, the current standard, you will have to clean your entire system of all traces of the R12 lubricant, which is not compatible with R134a, and replace it with the proper lubricant.
3) Replace your hoses with modern barrier hoses. These will have to be custom made. Necessary both to fit your new compressor and to handle the R134a (which will migrate through your current hoses)
4) If you convert to R134a, replace your current condenser with a multipath unit, to allow your refrigerant to shed more heat.

The above will get you cool air (not cold air) if your existing 45+ year old components are in good shape.
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Old Apr 21, 2018 | 01:52 PM
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Are you trying to keep your car all original or is modification OK? If mod is ok I will post you some pictures of my Vintage air sys install on my 73. If you have a 350 motor yours would look the same. The brackets they supplied bolted on and the belts lined up perfect.
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Old Apr 21, 2018 | 03:34 PM
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Been here in Florida for 21 years now.....through that time I have completely rebuilt/replaced any/ALL parts on the a/c system....went serp drive up north, so smaller lighter comp....I recommend the same '88-91 vette setup.....other stuff may fit, but no comment by me.....

replace the old tired condenser....150 bux off the .net the large POA valve needs the top/inner small nut turned about 1/2 turn counter clockwise for 134 freon.....the expansion valve should also be changed....the blower motor need upgraded to a C4 unit, with a home made wood 3/4 inch spacer because the new squirrel cage is deeper....you will need to change the ground wire for a nice thick one, and mount it up top on the engine...I used tabs off the intake manifold....
obviously all new hoses....make damn sure you suck out all the dirt/leaves/crap from the evap housing, down LO.....to do that you need take out/cut out the rear of the fender liner, remove the blower, and the overflow tank, and get a shop vac down there.....NOW here is the trick, see that silly fresh air intake door that stays open except when you call for recirc of cabin air....?? take that off there unhook the spring, disconnect the vac line, and reinstall with a ring or RTV around the door/seal.....then behind the kick panel inside, a couple simple screws/bolts and the inner door comes out, making the car on permanent recirculate....better flow and cooling when you need it...MY '72 is a vert so I don't need recirc air....
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Old Apr 22, 2018 | 11:54 AM
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Originally Posted by 1moore522
Are you trying to keep your car all original or is modification OK? If mod is ok I will post you some pictures of my Vintage air sys install on my 73. If you have a 350 motor yours would look the same. The brackets they supplied bolted on and the belts lined up perfect.
Modification is fine by me, original was lost on the last owner and left far behind by me...
Pics would be great!
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Old Apr 22, 2018 | 12:00 PM
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Originally Posted by mrvette
Been here in Florida for 21 years now.....through that time I have completely rebuilt/replaced any/ALL parts on the a/c system....went serp drive up north, so smaller lighter comp....I recommend the same '88-91 vette setup.....other stuff may fit, but no comment by me.....

replace the old tired condenser....150 bux off the .net the large POA valve needs the top/inner small nut turned about 1/2 turn counter clockwise for 134 freon.....the expansion valve should also be changed....the blower motor need upgraded to a C4 unit, with a home made wood 3/4 inch spacer because the new squirrel cage is deeper....you will need to change the ground wire for a nice thick one, and mount it up top on the engine...I used tabs off the intake manifold....


obviously all new hoses....make damn sure you suck out all the dirt/leaves/crap from the evap housing, down LO.....to do that you need take out/cut out the rear of the fender liner, remove the blower, and the overflow tank, and get a shop vac down there.....NOW here is the trick, see that silly fresh air intake door that stays open except when you call for recirc of cabin air....?? take that off there unhook the spring, disconnect the vac line, and reinstall with a ring or RTV around the door/seal.....then behind the kick panel inside, a couple simple screws/bolts and the inner door comes out, making the car on permanent recirculate....better flow and cooling when you need it...MY '72 is a vert so I don't need recirc air....
Holy Cow, so much for easy ! I'd rather sweat.... Thanks but, IF I could do all of this, my head would be so big that it wouldn't fit in the car
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Old Apr 22, 2018 | 02:45 PM
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HVAC guy across the street from me still uses R12. In some form of commercial refrigrration.

Last edited by derekderek; Apr 22, 2018 at 02:47 PM.
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Old Apr 27, 2018 | 02:52 PM
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My complete system setup:

pro6ten compressor with mounting brackets
parallel flow condenser
new evaporator core
VIR Elminator kit
C4 fan motor with spacer
New seal kit for A/C box
New heater core
new (OE style) shutoff valve.
secondary heater core shutoff valve (brass)

I run R-134 and can have it serviced anywhere.

The air blows much harder than the stock system. Temps in the low 40s.

I also put down hushmat and reflectix on the firewall, tranny tunnel, floorpans and waterfall. This keeps heat out while the A/C pumps in cold air.
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Old Apr 28, 2018 | 02:03 AM
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I went with Classic Auto Air for two reasons.
1.TXV metering. Why? You get the absolute coldest coil...without hitting that magical 32 deg. It also is constantly adjusting to different load demands unlike a fixed orfice metering device
2. The evaporator and the heater core aren't siamesed as one combined unit.
Also, in my 74 anyway, Classic has what they call a D.E.R. controller that totally takes the place of the clunky factory control levers instead of placing electronic "lady fingers" over the existing, clunky cable controls.
Last but not least, irreguardless of the which of the three choices you settle on, clearing up the entire passenger side firewall is a huge plus, and unlike factory, they all place the evaporator in the cabin where it belongs instead of in a hot engine compartment and only a few inches away from an exhaust manifold.
In closing, and since I've been in the hvac business for over 30 years, let me leave you with this because it works in all applications. Here you go....
"Give me a well insulated box and I'll show you how to hang meat".
Our C3's are basically a slapped together kit car with a LOT of room for improvement left on the table. One biggy is the lack of a well insulated box. I knew this going into my project and took care of this when I had the interior and carpet out.
I used a product called "Stinger Roadkill" and is about half the price of the other guys.
My cabin is WELL insulated and a blower setting above low speed will keep you chilling like a villian.
Perform due diligence and never look back! Good luck!
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