The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > Info Center > FAQ Truck Tech > Engine and Drivetrain > LSx Related

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-02-2021, 10:13 AM   #1
lts70
1970 Daily Driver
 
lts70's Avatar
 
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
Connecting LS A/C to Factory Air

We finally got the LS bolted into my boys 1968. Wondering if anyone has any pictures of how they connected the LS low mount compressor to the original AC system. May have to clearance my frame a little bit but I’m OK with that . Hoping to get some ideas r pictures from those that have been successful with this.
Attached Images
   
__________________
It's not truly yours if you didn't build it yourself or if you don't do your own maintenance.
lts70 is offline   Reply With Quote
Old 07-02-2021, 10:36 AM   #2
Davidf
Registered User
 
Join Date: Nov 2014
Location: Austin
Posts: 749
Re: Connecting LS A/C to Factory Air

Don't have much time to respond...heading for vacation soon. Anyway, I did a combination of Cold Hose extension pipes...converts to o-ring fittings straight to the front (did this for high side). For low side, I took the donor hose, cut the end off and welded a #12 nut to the pipe. So, the block compressor fitting comes straight up off the compressor and a straight 0-ring barb fitting connects to the compressor fitting (I converted my factory POA system to an orifice tube system). Had to slightly clearance frame for the low side pipe to clear.

Hope this makes sense.

https://coldhose.com/products/gm-5-3...35532197494944
Davidf is offline   Reply With Quote
Old 07-03-2021, 09:58 PM   #3
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
Re: Connecting LS A/C to Factory Air

If you can TIG, then it becomes pretty easy to do. If you can't, then you need to find someone who can, then its still pretty easy. You get the factory low side fitting and TIG a barb fitting on it, then you can crimp the hose on it. For the high side, if you can find a 99-07 GM SUV in the junk yard, you can snag the upper condenser line off it, and it will bolt to the high side of the compressor, but will come straight out the front so you don't need to notch the hell out of the frame. You will also have to weld a barb fitting on this than crimp on your hoses. There's pics in my build thread on LS1Tech, there's a link in my signature, the rusty one, not the blue one.
__________________
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
ls1nova71 is offline   Reply With Quote
Old 07-04-2021, 10:06 AM   #4
lts70
1970 Daily Driver
 
lts70's Avatar
 
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
Re: Connecting LS A/C to Factory Air

Thanks for the response guys. I injoyed looking through your build thread you are very talented!

I think these are the pictures you were referring to
Attached Images
  
__________________
It's not truly yours if you didn't build it yourself or if you don't do your own maintenance.
lts70 is offline   Reply With Quote
Old 07-04-2021, 06:44 PM   #5
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
Re: Connecting LS A/C to Factory Air

Yes, but that was the first attempt, however the high side was too small. I switched it out to the Tahoe condenser fitting and it comes out the front rather than looping around the low side hose like that one did. Post #262 has pics of the new line.

Edit: Apparently my memory is slipping, but I guess I made that whole line on the green truck, but on the yellow truck thread I have pics of the Tahoe condenser fitting. Post #202 https://ls1tech.com/forums/conversio...-build-11.html
__________________
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

Last edited by ls1nova71; 07-04-2021 at 06:58 PM.
ls1nova71 is offline   Reply With Quote
Old 03-10-2022, 04:47 PM   #6
lts70
1970 Daily Driver
 
lts70's Avatar
 
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
Re: Connecting LS A/C to Factory Air

Thanks for the examples ls1nova71, I have the weld on barb fittings ordered and I am hoping to get a set worked up for my boys truck like yours.

What condenser and evaporator are you using? Is there one that fits in the stock AC box?
__________________
It's not truly yours if you didn't build it yourself or if you don't do your own maintenance.
lts70 is offline   Reply With Quote
Old 03-18-2022, 12:43 PM   #7
lts70
1970 Daily Driver
 
lts70's Avatar
 
Join Date: Jun 2007
Location: Glenns Ferry IDAHO
Posts: 1,037
Re: Connecting LS A/C to Factory Air

Hoping these will get us off to a good start with the AC lines. Buddy got me the discharge hose section from a 2006 Tahoe on his junk yard run. Going to try to copy ls1nova71 sweet setup. Got the weldable barbs and odds and ends on eBay for cheap.
Attached Images
   
__________________
It's not truly yours if you didn't build it yourself or if you don't do your own maintenance.
lts70 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:49 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com