Everybody with a Gbody and A/C....
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Well uhm it depends on what G-Body you are swapping into. Theres a lot of ways to keep the AC, from ones that use factory brackets without cutting the frame to cutting the frame, to making new brackets. It all depends on where your factory compressor was located, if you want to use it or the LSx compressor and what car its going into.
Teching In
Joined: Apr 2005
Posts: 23
Likes: 0
From: Sevierville, TN
I am putting AC back in mine (85MCSS). I used a delete panel on the firewall and removed all of the clutter from the engine bay, and ordered the Classic Air kit that fits inside the dash. I just need to get my AC compressor bracket from S&P and I will be good to go. The S&P bracket mounts it high on the passenger side, and it makes my stock brackets on the drivers side look like crap.
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
If you are going with an f-body motor you have a couple options.
1. use the LS1 f-body compressor and bracket and notch the frame
2. If the GN has the compressor on the top passenger side you might be able to get a 3rd gen f-body R4 compressor with the serpentine belt pulley and then use a bracket to mount it to the passenger side head, I think it was either hawks or f-body motorsports that sells the bracket.
3. I think John B used to make brackets to mount a LT1 compressor high on the passenger side, not sure if he still does.
1. use the LS1 f-body compressor and bracket and notch the frame
2. If the GN has the compressor on the top passenger side you might be able to get a 3rd gen f-body R4 compressor with the serpentine belt pulley and then use a bracket to mount it to the passenger side head, I think it was either hawks or f-body motorsports that sells the bracket.
3. I think John B used to make brackets to mount a LT1 compressor high on the passenger side, not sure if he still does.
Are you trying to keep the G-Body system (Evap box, Condenser and controls) ?
In either or all of the following option, new or modify lines will be required.
The 1st item to review is the type of Adapter plates your using. If using the S&P style, you will have to relocate the AC compressor cause the plate will hit the compressor. Or use the F-Body R4 compressor as stated in the other replies.
If using BRP style plates and have move the Frame mounts, you can notch the frame and keep the LS1 F-Body compressor.
So, if the goal is to keep the rest of the G-Body system intack and just use the LS1 Compressor (R4 or a Sanden), you can just get someone to modify or make new lines to fit the LS1 Compressor (or R4/LT1) to the G-Body system and wire the compress to the G-Body electrical (may have to use a inline high pressure switch if you G-Body uses one, I think it does, and is located on the back of the compress or inline on the high side line going into the EVAP Box?).
It is just a switch12v and a ground, if using a high side switch, if the pressure gets too high, the ground is interrupted by high side switch and the compressor clutch is dis-engaged until the pressure return to the high pressure range.
fyi.. I am using my Stock Chevelle system with the only change being the LS1 Compressor and modified lines. using stock GM/A body controls. No High pressure switch was used.
It works, maybe not the best, but working on it and right now I got cold air. Depending on the driving and conditions, 45-50 deg air with highway speed and 50-57 deg air in traffic !
Hope this helps.
In either or all of the following option, new or modify lines will be required.
The 1st item to review is the type of Adapter plates your using. If using the S&P style, you will have to relocate the AC compressor cause the plate will hit the compressor. Or use the F-Body R4 compressor as stated in the other replies.
If using BRP style plates and have move the Frame mounts, you can notch the frame and keep the LS1 F-Body compressor.
So, if the goal is to keep the rest of the G-Body system intack and just use the LS1 Compressor (R4 or a Sanden), you can just get someone to modify or make new lines to fit the LS1 Compressor (or R4/LT1) to the G-Body system and wire the compress to the G-Body electrical (may have to use a inline high pressure switch if you G-Body uses one, I think it does, and is located on the back of the compress or inline on the high side line going into the EVAP Box?).
It is just a switch12v and a ground, if using a high side switch, if the pressure gets too high, the ground is interrupted by high side switch and the compressor clutch is dis-engaged until the pressure return to the high pressure range.
fyi.. I am using my Stock Chevelle system with the only change being the LS1 Compressor and modified lines. using stock GM/A body controls. No High pressure switch was used.
It works, maybe not the best, but working on it and right now I got cold air. Depending on the driving and conditions, 45-50 deg air with highway speed and 50-57 deg air in traffic !
Hope this helps.
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Teching In
Joined: Dec 2004
Posts: 39
Likes: 8
From: Houston, TX
Originally Posted by DarthMonte
I am putting AC back in mine (85MCSS). I used a delete panel on the firewall and removed all of the clutter from the engine bay, and ordered the Classic Air kit that fits inside the dash.
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3. I think John B used to make brackets to mount a LT1 compressor high on the passenger side, not sure if he still does.
Originally Posted by BLWN1
Any details on this? Price, link?
Staging Lane
Joined: Nov 2006
Posts: 74
Likes: 3
From: Southwest Missouri
The latest GM AC compressors supposedly are variable displacement and are electronically controlled. They vary the displacement instead of cycling on and off. Has anyone had issues hooking them up to earlier AC systems ? Can they be wired to cycle just like the older pumps?
The Geezer
The Geezer
The latest GM AC compressors supposedly are variable displacement and are electronically controlled. They vary the displacement instead of cycling on and off. Has anyone had issues hooking them up to earlier AC systems ? Can they be wired to cycle just like the older pumps?
