R 134 A conversion

[Camman]

Camman, could that have been a filter that you saw on your cars? Even according to this article that I read a long time ago, the orifice is always located between the condenser and the evaporator. It makes no sense to meter the flow of the hot compressed gas. The orifice meters liquid.

ORIFICE TUBE
The orifice tube, probably the most commonly used, can be found in most GM and Ford models. It is located in the inlet tube of the evaporator, or in the liquid line, somewhere between the outlet of the condenser and the inlet of the evaporator. This point can be found in a properly functioning system by locating the area between the outlet of the condenser and the inlet of the evaporator that suddenly makes the change from hot to cold. You should then see small dimples placed in the line that keep the orifice tube from moving. Most of the orifice tubes in use today measure approximately three inches in length and consist of a small brass tube, surrounded by plastic, and covered with a filter screen at each end. It is not uncommon for these tubes to become clogged with small debris. While inexpensive, usually between three to five dollars, the labor to replace one involves recovering the refrigerant, opening the system up, replacing the orifice tube, evacuating and then recharging. With this in mind, it might make sense to install a larger pre filter in front of the orifice tube to minimize the risk of of this problem reoccurring. Some Ford models have a permanently affixed orifice tube in the liquid line. These can be cut out and replaced with a combination filter/orifice assembly.

Reference - http://www.familycar.com/Classroom/ac1.htm

hey bro anything is possible, but I have seen many orifice tubes and I am 99% sure that this is what they both were. Now I live in las vegas, and both of these cars are from vegas.. There also is no lump in my liquid line to show there would be an orifice there, and the line is stock from the factory... I cant read the part number tho.

As far as the mechanic saying the old mustangs use a txv valve... maybe he was referring to first gen's with factory air? My 65 has the factory system and it uses a txv.

If everyone elses orifice tube is in the same place I would have to say I am smoking some really good stuff(i dont smoke) or I have a freak car. My 65 came from the factory with a generator... so it should be an early 65 but its not. The build date is from november. So does this mean I have 2 freak cars? Maybe Freak dance

edit: I edited my original post to say it was in the inlet to the evaporator instead of the condensor. um... I dont have an excuse for that... mah bad

 

[PuterAmI]

edit: I edited my original post to say it was in the inlet to the evaporator instead of the condensor. um... I dont have an excuse for that... mah bad

Ah!
Now that makes a lot more sense.

Yep, the classics indeed used the TXV. Since they have been around for 41 years, when ya say Mustang, ya gotta be a little more specific. It's kinda funny when people ask me what kind of car the 84 is.