I totaled my 92 and ended up grabbing a 93 F-150 EXt XLT 5.0 that needed a few odds and ends. I changed out my heater core and heat now works great and I just had a new AC compressor installed today , all new lines, orifice tube, accumulator, exc exc and fully charged.


Right after I ended up having to change my radiator out and installed a new 2 row radiator to replace to old damaged 1 row radiator.


AC blows cold, but not COLD and ofcourse when idling or sitting its even less cold. I know converting over reduces cooling output but I need cooler air, not looking to break the bank, hell i did that already today. Suggestions?

 

Did you charge it yourself or have it done at a shop. It is important to draw a vacuum on the system to eliminate and air pockets and moisture. Water in the line greatly reduces cooling.

 

It was installed in a shop, was vacuumed and charged

 

Electric fans would make for a big improvement. By adding a two row radiator, you increased heat soak on the condenser. On some of our ambulances that have been converted, we've had to cut the blower fan down one speed. This actually works. The air moves across the coils slower and cools the air down a few degrees more. It's hard to adjust the feeling that slower air could be colder, but the thermometer doesn't lie.

 

yep test it with a thermometer...

with a Engine fan there isnt a lot of flow at idle and the AC will get warm. I installed fans directly to the condensor on a switch and if i set idle long I flip them on and the AC is just as cold idling as it is going down the road...

mine is just a tad low ( 1/3 can) and it will hit 30° before the low limit switch pops. I've had it down to 26° before...

 

My factory charged AC still works fantastic on the xlt 95, no complaints at all but about 40 at the vent is it. I don't think I've seen frost on the vents since R12. In that respect those really where "The Good Old Days". There's a guy that comes into my shop with a little Toyota PU still running the original R12, with the 22r and a motor home chassis. Those things have to have some steep gears.

 

these are two pics I have of the truck sitting idle on a 90 degree day with a pretty good AC tune.

and it is a r134 charge.....

 

I miss my R22 set up Id have to turn it down in my first truck because it would get so cold, not anymore.



Do you have pics of your set up or info on fans your using?



Temps havent been much higher then 80 yet and im already warmer then i would like


Ill throw a thermometer up there and see what its at but i know its nowhere near that low, even when driving

 

r134 gets just as cold or colder than r22. the technique is in the charging method.

you want just enough of a charge to not trip the limit switch when driving down the road at 60mph.

too much Freon is just as bad as not enough. r134 works the best on LESS pressure on the lowside.

not sure if there is a difference on the low pressure limit switch from r22 to r134 but that might be a place to look. I've done many conversions and I've never changed the low pressure switch and I've had no problems getting ice cold ac with the right kind of charge.

EDIT: I forgot to add I think I ordered duel 12in or 10in fans for the condensor... whatever would fit. they are wired to a relay triggered via the low pressure switch. the switch has voltage when the ac is turned on.

 

dr bowtie - what is the light colored line on the left of your very frosty picture? The one that runs to the back left of the engine compartment? I think it's a vacuum line and related to an issue I'm having with my a/c and vents. it appears to be crumbling away on my truck (95 f150 5.8L) I see that it runs into the "little can" that has a lever on it... Not sure what that "can" is either but I think has to do with the venting in the cab.