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#1 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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87 A/C into 71 done
http://
![]() All air conditioning lines and wiring connected, heater hoses routed. I will take the inner fender back out and paint it. Gary
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#2 |
Hand Crafted C-10
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Location: Burien, WA
Posts: 5,180
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Re: 87 A/C into 71 done
Nice work
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#3 |
State of Confusion!
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Location: Gulfport, MS USA
Posts: 46,894
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Re: 87 A/C into 71 done
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#4 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,269
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Re: 87 A/C into 71 done
Very resourceful!! Great idea.
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#5 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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That reminds me of another truck.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#6 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
Thanks, I tried to use as much of the 87 stuff as I could, the hoses and lines seem to fit the earlier model truck pretty well.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#7 |
Registered User
Join Date: Jul 2007
Location: Yardville, NJ
Posts: 144
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Re: 87 A/C into 71 done
Very nice work. What kind of details can you give? What parts from the 87 were you actually able to use? What parts did you have to use from your own truck and what kind of mods are required? I am replacing my non a/c cab with an a/c cab due to rot and this could be the cheapest route if i could use most of the parts from a later model. Any info would be much appreciated!
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#8 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
The evaporator, accumulator, compressor hoses, and compressor and brackets are all 87. The rest of the parts on the firewall inside and out are 71. I used a universal 14x25 condenser which I fabricated brackets for. They air conditioniing will work as a cycling clutch orifice tube just like 87. I was hoping someone else could use this information as I think it is a good way to update the air conditioning system if you don't need to keep it all original, but still keep everything functional. If you have any more specific questions I'll be glad to help.
Gary
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#9 |
Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: 87 A/C into 71 done
So you still used the '71 air box, controls and heater?
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'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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#10 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
Yes, I did. I found the 87 evaporator fits inside the 71 box, so everything else works like original.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#11 |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: 87 A/C into 71 done
Great info. Thanks for sharing. Mine is only partially there so I was considering a square body as a donor. Good to know it works out well.
I am also looking at using the under dash HVAC system out of a mid 90's-up GM front wheel drive car with R134a instead. I have read about a few guys doing it in posts just haven't found any builds or info on how to do it or what is needed yet.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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#12 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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The bottom line in mine has the orfice filter tube inside it. I used all the 71 controls and boxes. I also swapped it over to 134 A freon and it blows 38 degree's all the time with the cowl vent mod.
I also installed a manual shut off to the hot water hoses so there is no hot water in the heater box inside the truck cab. That's good for about 5 degree's depending on the outside temp. If you do this mod don't try using the old A-6 compressor for cycling it was built for this and want last very long. I went through 2 of them before I figured it out. I also hooked the extra electric fan up to the AC switch so when it's turned on it turns the fan on. The fan is on a relay also. I cut the factory bracket off and put a screw in the bracket to hold the acumalator with. ![]() ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#13 |
Registered User
Join Date: Mar 2012
Location: Boulder, CO
Posts: 350
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Re: 87 A/C into 71 done
This is the route I want to go for my '70 C10- it is non/AC, but I've got a '69 AC donor for the boxes, controls, ducting and wiring. I figure I would use square-body critical components (condenser, evap coil, piping/hoses, accumulator) too. What compressor is a good one for the conversion. I've got pretty much a clean slate for what I do, and a good bit of AC experience from my days working in FL.
Nice work, both Katrina/10 and Andy4639! I searched the board earlier, and spotted Andy's set-up, it at least showed me it was possible, and my own measurements seemed to bear the possibility out. Now, to the wrenches! Posted via Mobile Device
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If 'that which does not kill me, makes me stronger', then I should be Superman by now! |
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#14 | |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
Quote:
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#15 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
[QUOTE=motorcritter;5861076]This is the route I want to go for my '70 C10- it is non/AC, but I've got a '69 AC donor for the boxes, controls, ducting and wiring. I figure I would use square-body critical components (condenser, evap coil, piping/hoses, accumulator) too. What compressor is a good one for the conversion. I've got pretty much a clean slate for what I do, and a good bit of AC experience from my days working in FL.
I used a universal condenser, not the square body style, because I figured it would be easier to install. The 87 truck stuff is what I used on the motor, which is an R4 compressor. The 84 and earlier trucks use a different compressor clocking and hard tubes, which don't seem to interchange as well.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#16 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
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You could use the compressor of the donor truck. Are at least a new one just like it. I didn't because I thought the old one would work. Then after the 2nd one I bought the upgrade kit from Vintage air with 134 A components along with hoses and compressor with mounts.
I to had a non AC cab and converted it myself. Katrina/10, I would like to know how you wired the compressor up just to compare notes for the cycling effect. How long does your's run before cycling. I had to play with the fitting on the acumalator to get mine to cycle. About every 8 minutes are so is what I left it at. ![]() ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#17 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
[I would like to know how you wired the compressor up just to compare notes for the cycling effect. How long does your's run before cycling. I had to play with the fitting on the acumalator to get mine to cycle. About every 8 minutes are so is what I left it at.[/COLOR][/B]
![]() ![]() All I did for that was cut the original compressor clutch wire and splice in the low side pressure switch on the accumulator. The other side of the switch I added new wire to go to compressor, now located on the driver's side. Cycling varies widely depending on fan speed and outside temperature. If it's really hot, not much cycling.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#18 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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![]() Quote:
Cycling varies widely depending on fan speed and outside temperature. If it's really hot, not much cycling.[/QUOTE] Thanks, I did it right then! Lol... ![]() ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#19 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: 87 A/C into 71 done
Good info. I'm wanting to do this in mine
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#20 |
Registered User
Join Date: Mar 2012
Location: Boulder, CO
Posts: 350
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Re: 87 A/C into 71 done
Katrina/10, I was going to use a new style condensor- like a Ford (laminar flow) to get more efficiency on that side. I am looking at using a high-capacity compressor, like a Sanden, Sankyo or Denso. The old R4 is handy, but there's better ones out there. A serpentine belts setup from an S10, and it ought to be like a meat locker in the cab!
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If 'that which does not kill me, makes me stronger', then I should be Superman by now! |
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#21 |
Registered User
Join Date: Oct 2010
Location: Ocean Springs, MS
Posts: 1,746
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Re: 87 A/C into 71 done
I used an aftermarket 14x25" condenser which has the improved flow you mentioned. I believe I bought it from Nostalgic Air Parts for about 80 bucks. I bought several other things from them to finish the project, got good customer service.
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Gary 1971 Chevrolet C/10 1951 GMC 100 1977 GMC C15 1955 Chevrolet 3100 |
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#22 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: 87 A/C into 71 done
Katrina/10. It's starting to get warm out. How's it working for you?
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#23 |
Registered User
![]() Join Date: May 2012
Location: Anton, Texas
Posts: 2,364
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Re: 87 A/C into 71 done
i think you did a great job....i like it a lot....coooool.
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