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#1 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,553
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AC - POA conversion
About a year ago someone posted up a conversion to rid the truck of the poa valve and all the little incedentals. Included a swap to a different evaporator and use an orifice tube. Does anyone have this info?
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#2 |
Registered User
Join Date: Jul 2000
Location: NC
Posts: 987
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I think this might be the post you are looking for...
http://67-72chevytrucks.com/vboard/s....php3?t=112463 |
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#3 |
Senior Member
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Location: Colfax-California
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Good article and tech,(saved it and printed) but there was a different one with the use of a later model evap -----------oldsmobile if I remember right. What I'm doing is trying to get together all the parts I need to put a 400sb in my GMC with the serpentine setup. At the same time, with everything out of the engine bay I thought I would update the AC.
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#4 |
Senior Member
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Location: Colfax-California
Posts: 8,553
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Anyone else remember this?
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#5 |
Lovin' Life in Miss.!
Join Date: Mar 2004
Location: Puckett, Mississippi
Posts: 1,937
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I am interested in this also. I have an uninstalled poa elimenator kit but am interested in a differant set-up. I saw a variable orifice on a/csource.com. http://www.acsource.com/index.asp?Pa...S&Category=273 Looks like a good idea. If I can find a newer gm evap that will fit in out "suitcase" I'd like to give it a try.
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The truck... you hear that? No really, you did hear that?!!! |
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#6 |
Mike
Join Date: Jan 2003
Location: west chester pa
Posts: 2,474
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Here is another a/c place that has a forum at the top.Lots of info on retro'ing an old system. www.ackits.com
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70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires |
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#7 |
Senior Member
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Location: Colfax-California
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If I can find a newer gm evap that will fit in out "suitcase" I'd like to give it a try.[/QUOTE]
Exactly what the thread was about-- an oldsmobile core in the truck 'suitcase' the top tube curled off to the side where you could put the later model dryer. |
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#8 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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Not sure how close demensionally the newer chevy truck evap. cores are but they look real close in size,at least the housing does anyway.
The newer Chevy trucks(73 and up) use an accumulator and a FOT. FOT on the inlet(bottom tube) side and the accumulator on the top tube. Here's a post about accumulators. http://www.autoacforum.com/messagevi...AR_MSGDBTABLE= ![]()
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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#9 |
Senior Member
![]() Join Date: Dec 1999
Location: Southern California
Posts: 2,810
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You can purchase a direct fit new style evap from Old Air. I have done two swaps. Very helpful with the parts you need.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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#10 |
Senior Member
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Location: Colfax-California
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I'll try old air. I know that thread is in here somewhere, someone has to remember.
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#11 |
Senior Member
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Location: Colfax-California
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top of the thread, anyone?
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#12 |
Senior Member
Join Date: Jun 2000
Location: yucaipa ca
Posts: 580
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i used the evaporator and acumulator from a later model chevy truck.
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#13 |
Lovin' Life in Miss.!
Join Date: Mar 2004
Location: Puckett, Mississippi
Posts: 1,937
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And could you narrow down the year group?
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The truck... you hear that? No really, you did hear that?!!! |
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#14 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
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I took a 78 Blazer and got Evap. demensions of 10"x8"3/4X2"3/4.But for some reason I can't find any demensions for a 69-72 Blazer evap. core.
I think 73-80 used the same evap. core. I'd say they are real close but if anyone has a 69-72 evap. core laying around that they could measure for us that would be great!
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE Last edited by BobbyK; 06-04-2005 at 02:39 AM. |
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#15 |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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I have a 72 evap sitting in my basement. From the stock Harrison set up. What measurements do you need, exactly?
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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#16 |
Registered User
Join Date: May 2000
Location: Petrolia,Ontario,Canada but working in Port Huron,Mi.
Posts: 1,771
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Height,Length and thickness.
How close is it to the demensions of the 78 evap. core?
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE |
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