AC retrofit questions Old + New

[ItsRandy]

Originally Posted by clinebarger

They are a GM/Harrison "space saver" "lower cost" replacement for the A6 that came on our trucks untill the early 80s. Im open to any good experience you have had with them?

So an A6 compressor is a "pancake" compressor? I don't have any experience with the R4, there is a guy in Georgia making a BB ac bracket using the R4 compressor I was going to buy. Do the R4 compressors have a high failure rate or short lifespan?

[leddzepp]

A-6 is the factory compressor used on our trucks. It is the "long" or axial type. The R4 is the "pancake" style. Here are pics of both. Rebuilt A-6's are total junk....I went through 4 of them. They all leaked at the front seal. If going with an A-6, I recommend buying a brand new unit ($700 or so) or getting a nice used one from a junkyard that is not locked up (about $25). I bought a used one from pick n pull, and it works perfectly.

[Zoomin]

Originally Posted by leddzepp

A-6 is the factory compressor used on our trucks. It is the "long" or axial type. The R4 is the "pancake" style. Here are pics of both. Rebuilt A-6's are total junk....I went through 4 of them. They all leaked at the front seal. If going with an A-6, I recommend buying a brand new unit ($700 or so) or getting a nice used one from a junkyard that is not locked up (about $25). I bought a used one from pick n pull, and it works perfectly.

Here's another option for those wanting a factory look and wanting something more efficient than an A6 - It's an R4 in an A6 looking case. If you painted the aluminum case black, few people would notice, and the hoses come out the right places.



More info here

[leddzepp]

Originally Posted by Zoomin

Here's another option for those wanting a factory look and wanting something more efficient than an A6 - It's an R4 in an A6 looking case. If you painted the aluminum case black, few people would notice, and the hoses come out the right places.



More info here

That is the A-10 offered by Old Air products. If wanting new and still looking original, this is the compressor to buy. I have also used these and they work perfect.

[El Campo]

Digging this up again finally. Have been working on the chassis so just now trying to gather parts for AC again. Clinebarger I am going to take you up on your offer. Several more questions I had: I have read elsewhere that the Sanden 508 is too small for our condensors, do you think that is true? The Sanden 709 is slightly bigger and more expensive but would probably cost more. Or the one I previously noted. Since I have a whole box of real R12 in my garage that is from the 80's and I want a virtual refrigorator I was thinking that I would use the R12. I have a in perfect shape condensor for a 72 so would be handy to be able to use it as long as it is compatible with the Sanden. Also had another question for you: If I never care to use "outside air" for the heating/cooling system (on my DD I have not had it on anything except recirculate for literally years) do I have to retain the door in the cowl or even the door inside the cab? Was thinking that I could maybe fill the door in the cowl and totally remove the door from the kick panel inside. Also if I did that would I even need the vacuum bulb? Does the AC use vacuum anywhere except in the function of changing form recirculating to outside air? Sorry for the ignorance just trying to make everything work for me. Also is this the evaporator core and accumulator you were talking about?


ACDELCO Part # 156513 EVAPORATOR,A/C (W/CASE) [From a 78 Olds 98, about 120 dollars]
http://www.rockauto.com/dbphp/prt,315,156513


ACDELCO Part # 151679
ACCUMULATOR,A/C 3.5IN DIA X 9.10IN LG, 1-1/16 OUTLET FITTING [From 77 Chevy C10, about 20 dollars]
http://www.rockauto.com/dbphp/prt,315,151679


ACDELCO Part # 151240
ACCUMULATOR,A/C 3.0IN DIA X 8.5IN LG, 5/8 OUTLET FITTING
http://www.rockauto.com/dbphp/prt,315,151240

Any idea which of these I will need? Also will I need one of these:

FOUR SEASONS Part # 7134209 [From 77 Chevy C10, about 4 dollars]
Accum Tube Outlet
http://www.rockauto.com/dbphp/x,cata...s_7134209.html

[clinebarger]

Originally Posted by El Campo

Digging this up again finally. Have been working on the chassis so just now trying to gather parts for AC again. Clinebarger I am going to take you up on your offer. Several more questions I had: I have read elsewhere that the Sanden 508 is too small for our condensors, do you think that is true? The Sanden 709 is slightly bigger and more expensive but would probably cost more. Or the one I previously noted. Since I have a whole box of real R12 in my garage that is from the 80's and I want a virtual refrigorator I was thinking that I would use the R12. I have a in perfect shape condensor for a 72 so would be handy to be able to use it as long as it is compatible with the Sanden. Also had another question for you: If I never care to use "outside air" for the heating/cooling system (on my DD I have not had it on anything except recirculate for literally years) do I have to retain the door in the cowl or even the door inside the cab? Was thinking that I could maybe fill the door in the cowl and totally remove the door from the kick panel inside. Also if I did that would I even need the vacuum bulb? Does the AC use vacuum anywhere except in the function of changing form recirculating to outside air? Sorry for the ignorance just trying to make everything work for me. Also is this the evaporator core and accumulator you were talking about?
A higher displacement compressor is a good idea considering the size of the condenser, The evaporator is also a little larger than most

Sanden also has a SD510, See what the price is on this? Maybe cheaper than a 7-piston?

In my opinion having fresh air in the winter is mandatory, Your going to have to restore the rest of the underdash part anyway....(New rubbers on the doors, make sure everything fits right & seals up) Might as well make everything work.



ACDELCO Part # 156513 EVAPORATOR,A/C (W/CASE) [From a 78 Olds 98, about 120 dollars]
http://www.rockauto.com/dbphp/prt,315,156513
This is the one, You may have to turn the "Inlet" tube forward depending on the fitting you use

ACDELCO Part # 151679
ACCUMULATOR,A/C 3.5IN DIA X 9.10IN LG, 1-1/16 OUTLET FITTING [From 77 Chevy C10, about 20 dollars]
http://www.rockauto.com/dbphp/prt,315,151679
This one looks like it will work, I never wrote down the number of the accumulator i used


ACDELCO Part # 151240
ACCUMULATOR,A/C 3.0IN DIA X 8.5IN LG, 5/8 OUTLET FITTING
http://www.rockauto.com/dbphp/prt,315,151240
You dont need this. Its a receiver dryer for a expansion valve style systems

Any idea which of these I will need? Also will I need one of these:

FOUR SEASONS Part # 7134209 [From 77 Chevy C10, about 4 dollars]
Accum Tube Outlet
http://www.rockauto.com/dbphp/x,cata...s_7134209.html

..

[El Campo]

SD5 Series
Fixed Displacement - 5 Pistons
Ear Mount
SD5H14

138cc

6000 r.p.m

SD5H11

108cc

6000 r.p.m.

SD5H09

89cc

6000 r.p.m.

I belive the 508 is one of the ones above. (These are all 5 piston compressors)

The biggest ones that I could find on the Sanden website were the following:
SDV Series


Variable displacement - 6 and 7 piston models
Displacement can be varied from 5% - 100% for maximum efficiency
Displacement internally controlled by pressure valve

SD7V16

161.3cc

8000 r.p.m.

SD6V12

125cc

8000 r.p.m.


And then you have these (the 7 piston compressors)

SD7 Series
Fixed Displacement - 7 Pistons
Direct & Ear Mounts Available
Variety of Clutch Configurations
Flexible Porting Options

SD7H15

154.7cc

6000 r.p.m.

SD7H13

129cc

6000 r.p.m.

SD7B10

100cc

6000 r.p.m.

What do you think? I can build brackets to make anything work! 138cc for the 508 (if I am sorting the R134A numbers out correctly and 154.7cc for the 510. The bad news about the 510 is that I cannot find one that has a serpentine pulley.

[clinebarger]

The SD7H15 looks promising, And around the same displacment as a SD510.

A SD5H14/SD508 works OK, But the above compressors will help with you wanting to "hang meat".

You can swap the V-belt clutch to a serpentine clutch.

[72 K20]

Suscribed

[tkeduk8r]

me too...