Build 1994 BUILD OUT and LS swap! Let's Go!

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The dual cardian drive shafts make the pivot point closer to the transmission pan and is also bigger around than the drive shafts itself.
 
TLC94LS said:
Hey everyone! Im still around! Finally got that heater core swapped out and dash re-installed, surprising only had a few screws left over! No matter how slow I went still have some extras!

Another item off the list is I finally got the AC working. I had hoses made from supplies I ordered from Cold Hose as others have mentioned. I couldn't get a leak test to pass, so while I had the dash out, I swapped out the evaporator core, expansion valve, and a new condenser. I had already but a new dryer in. Of course it still leaked, and of course the only part not swapped, the original GM compressor! It was leaking from the seam where the two halves come together. Swapped it out, leak checked GTG! Charged up the system working great.

How I have my wiring is all I did was take the power from the old toyota ac plug and spliced on the GM ac compressor. So the Toyota system is working. Only thing I had to come up with was how to get one of my electric fans to kick on. The GM ECM should be able to do it, which I won't get into right now, but for what ever reason, I couldn't get it to work. So I remembered reading a thread called the ABC's of 80s cooling and they talked about adding an AUX fan for AC while trail riding or slow speeds with little airflow. Apparently its was an option overseas. So using the Toyota Hi/Lo pressure switch for the ac coolant system, there's a 3rd position of MID range PSI, I believe it is 250psi, and I know the HI is about 500psi, because during servicing I would see it get to 500psi and shut off every time. So I hooked up a ground through the pressure switch to trigger one of my fan relays. During testing, it would cycle on and off. It seems to be working well. I am aware of the potential for batt bleed down since my relays are batt hot and ground controlled by the GM ECM and now this pressure switch. I know I will be careful of it and I carry a jump box. I will cross that bridge of protentially changing it some how. For now, Ive got AC and a fan to cool the condenser, Im going to take the win.

I just ordered the battery tray mount and mounting plate from Red Line Cruisers to clean up my fan wiring, relay mounting, and fuses for all of this. So we are really just buttoning up loose ends. I have about 650 miles on the swap. With individual drives over a 100 miles. So everything is good so far.

My last thing I need to monkey around with is my shift linkage. I just don't love how mine came out. I have a plan moving forward and will hope to get it done in the next two weeks. Then final button up, wire wrap and get my seats re-covered!
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husker said:
On your A/C curios what charge pressure you ended up with on the high side and what did you do on your tuning to get the idle bump correctly on compressor engagement. Also i just installed the condenser fan kit from Maxfab, works great. Landcruiser AUX AC Fan Full kit FJ80/FZJ80 - https://www.maxfab4x4.com/products/land-cruiser-aux-fan-kit
Glad to see you enjoying your build! your documentation helps a lot of folks.
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I'll kinda answer this the ls will see a load change when the ac is turned and will bump up the idle but you can do some other wiring and the ecm will bump the idle when you turn the ac on and will drop after turning the ac off. Ac pressures change so there isn't a will say an exact number pressure changes with outside temperature also air flow across the condenser coil less air flow higher pressures. Running an aux ac fan will help in stopped traffic but isn't necessary if your getting enough air flow now if it hot as hell over 100 in stopped traffic it will definitely help there.
 
tmxmotorsports said:
I'll kinda answer this the ls will see a load change when the ac is turned and will bump up the idle but you can do some other wiring and the ecm will bump the idle when you turn the ac on and will drop after turning the ac off. Ac pressures change so there isn't a will say an exact number pressure changes with outside temperature also air flow across the condenser coil less air flow higher pressures. Running an aux ac fan will help in stopped traffic but isn't necessary if your getting enough air flow now if it hot as hell over 100 in stopped traffic it will definitely help there.
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New to me 92 FJ80 with tastefully done (Gen3 DBC LM7/4l60e) swap by previous owner that logged 20k miles prior to my recent ownership. Now getting a renewed push to true up some final bits (evap, fine tuning, drivability).

A/C was substantially done and now have it working so now getting it to the finish line and adding to my LC arsenal...since the compressor signal is from the LC chassis harness, trying to confirm if "other wiring" is necessary to pin back to PSI ECM or if can be controlled through HP Tuner as is. Meanwhile by substantially complete FJ45 lwb project has again gotten bumped
 
husker said:
New to me 92 FJ80 with tastefully done (Gen3 DBC LM7/4l60e) swap by previous owner that logged 20k miles prior to my recent ownership. Now getting a renewed push to true up some final bits (evap, fine tuning, drivability).

A/C was substantially done and now have it working so now getting it to the finish line and adding to my LC arsenal...since the compressor signal is from the LC chassis harness, trying to confirm if "other wiring" is necessary to pin back to PSI ECM or if can be controlled through HP Tuner as is. Meanwhile by substantially complete FJ45 lwb project has again gotten bumped
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Yes adding wiring/ pinning back into the ecm connector. There is a way to wire the ac button to the ecm then the ecm sends a signal to the compressor there is also more wiring to make it work with gm trinary switch and will turn fans on and off at certain pressures if your running electric fans for engine cooling the ecm can control all of that if not its not necessary just run the button to the compressor.
 
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