| A6 capacity [message #280981] |
Mon, 29 June 2015 08:34  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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It has been mentioned that there are several iterations of the A 6 A/C compressor, of different capacities. If this is correct, how can I determine what the capacity of one actually is? I can get a rebuild for about $110, which is worth a chance on the rebuilder. But, I'd like to get the highest capacity unit made if there are several.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] A6 capacity [message #280988 is a reply to message #280981] |
Mon, 29 June 2015 09:54  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Johnny,
The A-6 compressor capacity is only one size:
"The A-6 was Frigidaire's first axial designed compressor. This compressor used a cast-iron cylinder and heads with a steel case and "swash" plate. The A-6 designation related to its axial design and the fact that it was a 6-cylinder compressor unit. The interior of the compressor also had an oil pickup and sump system to lubricate the internal parts. The A-6 compressor will push out 27,000 BTUs at 2,000 rpm and as high as 42,000 BTUs at 4,000 rpm with a discharge rate of 240 p.s.i. That's enough cold air to cool a small house (most home window-mounted air conditioners are only rated from 5,000 to 12,000 BTUs). The compressor functions much in the same way an engine does but without the ignition and combustion strokes. An A-6 is rated at 1.5-inch bore with a 1.2-inch stroke and 207cc displacement. That's about 121/2 cubic inches. The A-6 is also highly adaptable. It can run in 6, 12 or 24-volt systems if you install the proper clutch coil. They are a pretty resilient unit too; they can turn consistently at 6,500 rpm all day without overheating, and you can turn them in either direction and they will function in the same way. Originally designed to be used with R-12 Freon, modern adapter kits allow the A-6 to run on the newer, more environmentally friendly R-134a.”
But it is very versatile with a number of back plates for use on many vehicles. Primarily used on GM vehicles from 1962-’85 and other cars from 1971 and up. Anyone used on a GM vehicles are the same with both hoses attached to the back of the compressor by way of just one fitting. Here is a list of possible donor vehicles:
1962-'84 Buick and (and 1985 Buick diesels)
1962-'79 Cadillac and Oldsmobile
1962-'81 Chevrolet (cars) and Pontiac
1962-’85 Chevrolet and GMC trucks
Other manufacturers:
1972-'80 Ford
1971-'80 Lincoln
1974-'80 Mercury
1972-'85 Jaguar XJ6 and XJS
1978-'86 Audi 5000
1966-'85 Mercedes
1972-'82 Volvo
I bought my last A6 a couple of years ago from Advance Auto and it was a rebuild from Harrison Four Seasons which built the originals for GM.
or
http://tinyurl.com/ork87v9
And
or
http://tinyurl.com/o4u6pcp
And
http://www.appliedgmc.com/prod.itml/icOid/905
And you can also buy NEW units, but you will be paying a high premium for those in the $300 to $400+ range. You can also update to the Sanden style compressors that work very well also but can be pricey from some of the aftermarket suppliers. This one from Jim K is a very price for a direct replacement.
http://www.appliedgmc.com/prod.itml/icOid/1423
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCGL Tech Editor
GMCMHI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan
> On Jun 29, 2015, at 9:34 AM, Johnny Bridges wrote:
>
> It has been mentioned that there are several iterations of the A 6 A/C compressor, of different capacities. If this is correct, how can I determine
> what the capacity of one actually is? I can get a rebuild for about $110, which is worth a chance on the rebuilder. But, I'd like to get the highest
> Capacity unit made if there are several.
>
> --Johnny
>
> --
> '76 23' transmode Norris upfit
> Braselton, Ga.
>
> "Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: A6 capacity [message #280998 is a reply to message #280981] |
Mon, 29 June 2015 12:13 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Thanks. I was misinformed about capacity, probably someone saw the ratings at different speeds. Essentially, I will have a 30K BTU system if/when I add an aux evaporator. $139.99, less 20% is AutoZone's delivered to the door price. I think I'll go for it.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: A6 capacity [message #281005 is a reply to message #280998] |
Mon, 29 June 2015 15:03 |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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Johnny Bridges wrote on Mon, 29 June 2015 12:13Thanks. I was misinformed about capacity, probably someone saw the ratings at different speeds. Essentially, I will have a 30K BTU system if/when I add an aux evaporator. $139.99, less 20% is AutoZone's delivered to the door price. I think I'll go for it.
--johnny
Johnny,
Was that the 57089 or 57087 clone?
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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| Re: A6 capacity [message #281025 is a reply to message #280981] |
Mon, 29 June 2015 18:06 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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rebuilt Harrison (frigidaire)(GM) A6.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
[Updated on: Mon, 29 June 2015 18:22] Report message to a moderator |
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| Re: A6 capacity [message #281082 is a reply to message #280981] |
Tue, 30 June 2015 13:35 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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So 3.5 Tons at a good clip. I don't think our condenser can support 3.5 Tons if I had to guess. Maybe when the fan is locked up .
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] A6 capacity [message #281492 is a reply to message #280988] |
Sun, 05 July 2015 10:08 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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powerjon wrote on Mon, 29 June 2015 09:54Johnny,
The A-6 compressor capacity is only one size:
Generally this is true EXCEPT Corvettes had a reduced capacity A-6.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] A6 capacity [message #281573 is a reply to message #281492] |
Mon, 06 July 2015 15:54 |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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Senior Member |
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How do you get to the "less 20%" part?
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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| Re: A6 capacity [message #281597 is a reply to message #280981] |
Mon, 06 July 2015 21:34 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I got a mailer from AutoZone with a less 20 code 20HOT10, I think it was. Good for a couple of days, it's probably expired now.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: A6 capacity [message #281605 is a reply to message #280981] |
Mon, 06 July 2015 22:56 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Anyone know how much horsepower it takes to run one in the 2-3 ton range?
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: A6 capacity [message #281635 is a reply to message #281605] |
Tue, 07 July 2015 10:30 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Chris,
When I did refrigeration (by command of my employer) is was introduced to 1 ton = 1 HP of compressor and that was pretty much true across 12, 22 and 502. I would guess it is still pretty close.
Matt
Chr$ wrote on Mon, 06 July 2015 23:56Anyone know how much horsepower it takes to run one in the 2-3 ton range?
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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