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#76 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Well ran into my first snag. Got the newer style condenser, and I just don't see how it can fit without a bunch of cutting of the core support (which I dont want to do). It's much, much wider than the original. So I'll be sending it back and getting an 85 replacement. Might make the hoses easier too.
I do think I'm going to go with PCM controls, but I'm not quite sure how to handle the fans. Right now I have dual electric, and the second is actually re-using the old control from a recirculator blend door or something like that. From a little research it seems that in 01/02 there wasn't a second fan control, cause all the trucks had mechanical fans. The guy who unlocked my PCM and programmed the fans (Lt1swap.com) said that he can reprogram it so that fan 1 comes on with the AC... well fan 1 is always on within minutes of warming up, and never turns back off so I don't really see the point in that. I might be able to set up another relay to provide the ground to the fan 2 relay when I turn on the AC from the truck.. going to have to mull over that a little. |
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#77 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Ordered some Cold Hose adapter fittings.
https://coldhose.com/collections/hk9...35532197494944 Even with these it's gonna be tight. I was hoping to avoid notching the frame with these engine mounts, but I think I'm still going to have to. |
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#78 |
Registered User
Join Date: Apr 2008
Location: Md
Posts: 2,477
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Re: First time swap started
Would those adapters work any better with a stock pump?. Post a photo when you get them in.
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#79 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Will do.
Got the new evaporator core in tonight. Pro tip - if you plan on refreshing your AC system with new parts, replace the thing while your motor is out. Lord. |
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#80 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Been a while since an update, life happened and I haven't really be putting time in this.
Got the compressor installed, I did need to notch the frame a little to make room for it. Excuse the janky cuts, I was trying to work around the heater hoses as I didn't want to drain the system again after just putting a new water pump in. ![]() ![]() ![]() New custom hoses from Cold Hose coming this week, and ordered an AC servicing setup off amazon that includes a pump and gauge manifold set. I wish cold hose split up their fittings, but they don't you have to buy them as a set. The extension on the high pressure side it great, but the suction side could have just been a straight up fitting (which they also sell, but as a set). |
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#81 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Well, new hoses installed but have been having problems with the R134 conversion adapters.
First one damaged the existing schrader valve in my new accumulator. Was told to leave it in place, but it fully depresses the valve and then attaching the service port and opening it, broke both valves in the accumulator and the adapter. Removed the existing schrader for the second one, charged the system but it's not holding the pressure and leaks profusely as soon as the port from my gauge manifold is removed. Just have a new one added to your new hoses if going this route. |
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#82 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,563
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Re: First time swap started
It is for these reasons that I am moving the AC up on the engine. This will also make servicing much easier. I really wanted to go the route you are using, but ultimately opted out. Your method makes a much cleaner look and should be very reliable.
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#83 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
I don't know about cleaner, there's a lot of hoses running around here, haha.
![]() For reference, I used this image (courtesy of Scotty Baccus from from the LS Swapped Square body facebook group) for my wiring of the AC system (already had the fans wired previously). ![]() Even with my currently leaky fitting the compressor kicked on when I started adding refrigerant and cooled the cab down quite nicely. |
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#84 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,563
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Re: First time swap started
I am assuming that using the ECM for compressor control that there is a built in " Wide Open Throttle" compressor shut down? I am also assuming that this will work with a Sanden compressor?
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#85 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
I honestly don't know. My ECM was just unlocked with no other tuning done, so I assume it works like factory?
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#86 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: First time swap started
This will work for the fans and will control the A/C compressor, will cut it off at full throttle too, but it doesn't appear there is any A/C control over the fans in this schematic. As long as the engine is up to temperature and the fans are already on it will work alright, but until then you will have no fans pulling air across the condenser. Also, you will almost never have the high speed fans on, which will make the A/C temperature in the cab warmer than you will probably like when you're not moving above 40mph or so. Just something to think about. I would put a trinary switch in it to control the fans whenever the A/C needs them.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#87 | |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Quote:
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#88 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: First time swap started
My setup will be similar. I have dual condenser fans wired through relays with power supplied via the compressor relay. So, a/c on, fans on. My assumption is that using the ECM to control the compressor with allow for WOT a/c cutout and avoid idle dips when compressor clutch cycles. I have a "secondary a/c high pressure" ECM signal wire I cannot remember what to do with.... I retained the cycling switch and the switch in back of compressor in my donor wire harness. My '71 clutch wire will pass through a high pressure switch before connecting to A/C request of the ECM.
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#89 | |
Registered User
Join Date: Apr 2008
Location: Md
Posts: 2,477
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Re: First time swap started
Quote:
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http://67-72chevytrucks.com/vboard/s...d.php?t=635605 |
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#90 | |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Quote:
Has my fitting sizes, hose lengths that I ordered and notes about what I would have done different. |
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#91 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: First time swap started
Dang, I ordered my compressor adapter fittings from Cold Hose on 6/21/21 and they are scheduled to show up today. Wonder if I got the las set. Still may buy regular straight up adapter fittings as well and mix and match.
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#92 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Yeah it's a shame they don't sell them that way. The pressure line is perfect pointing towards the front like that but the suction line is a bunch of wasted hose since it could go right in the top.
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#93 | |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: First time swap started
Quote:
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#94 | |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Quote:
Also I had to get on the floor and bend the gas pedal rod a bit. Stock it doesn't put any pressure on the cable at rest. Bend it up a little bit so that it takes the slack out and it's good. |
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#95 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: First time swap started
BTW, been using this photo for reference when discussing hoses, special fittings, hard lines, etc with my local a/c parts/rebuilders/custom shop. I too purchased the Cold Hose adapters that send the compressors fittings straight to the front. Make sense for the high side, but not for the low side which can go straight up and still clear the frame. So, I asked the local shop if he had the high side regular adapter and said out of them, but on order and hard to get because of metal shortage, etc. But, he said just bring in the donor hose/fitting and he will make what I want. Bingo! Why didn't I think of that? Glad I purchase the entire donor vehicle. So, going straight from compressor to accumulator with a #10 hose stepped up to #12 at the accumulator.
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#96 |
Registered User
Join Date: Jun 2014
Location: Reading, PA
Posts: 203
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Re: First time swap started
Realized I never updated this. I kept having leaking issues with the low side retrofit adapters (R12 > R134a) so I sent the suction line back to Cold Hose and had them add a new spliced-in suction port. After refilling the system blows ice cold and is working great!
First time I've had working AC in this thing since I bought it in 2014. |
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#97 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,563
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Re: First time swap started
Congratulations! Great job!
__________________
70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#98 |
Registered User
Join Date: Apr 2008
Location: Md
Posts: 2,477
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Re: First time swap started
Just getting back to finishing A/C...OEM Compressor 2001 Silverado.....new condenser ( crossflow) new "87" -"90's " evaporator new dryer acumulator with a switch. Wires dark green light green...How should it be wired..No fans....request wire from ECM and green and black wire from 71 in the cab...2001 Compressor front wires green and black, rear are green with a white stripe and LT blue. Searched but have not seen results I can follow....Thanks in advance...Ed
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