Anyone purchase/install the LMR R-134a conversion kit?

I replaced the liquid line with LMRs... Temps aren't as low as the were with the OEM line. I wonder if the orifice tube is more restrictive, causing the difference. Temps aren't terrible but went from ice cold to just decent. Can't keep up on the hottest days.

Bought new system for mine, not yet installed. Can get all of those components separately with the Evaporator for a couple hundred less from Rock Auto, FWIW.

RaggedGT said:

Was it 134a before the liquid line?

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yessir. To your possible point, I bought the car the first time in 2014, and can't say it was the OEM line, though.

Man, I still have cans of r12.

What was your process to complete the conversion? You don't say what you did so my response is based off of that.

If you dont already have a set of AC manifold gauge set, I suggest you get a set and use it to do the conversion and to better monitor the high/low pressure sides to better know what's going as you do the conversion.

I did the conversion with a '94 ranger (not a mustang but same job) and all I changed was the A/C drier/receiver and connectors from Advance Auto or Auto Zone. I removed the refrigerant and pulled a vacuum using my compressor and a cheap vacuum pump ro make sure there were no leaks. The system was ice cold after the conversion. The trick was to get all that old refrigerant out of the system and pull a vacuum and to make sure the correct amount of refrigerant was in the system via the gauges.

If I had to change all that you posted, I probably would not have made the conversion. I don't think you need to change all of that stuff. I think you need to check the system capacity and maybe redo the charge.

Is that AC cycling switch ok?

My A/C died on my 1991 GT in 1999 and the repair bill was $2000 so I got my R12 license and did a rebuild myself. Thankful for a fraternity brother that owned a junkyard and had reclaim tools!

I have the R143a conversion kit from LMR in my garage. Really, really want to replace the evaporator and therefore not muck up the flush of the existing evaporator. But then I'll want to swap out the heater core, vacuum and wipe down the HVAC box, and the next thing I know it'll be 2028 with the car still apart lol!

I agree. Too much pressure drop is my problem, and it was The Infamous Project's problem, too. I suppose too low a pressure correlates with less coolant mass in the evaporator core, which means that it has less mess to transfer energy into.