hotrod351

well i had to top off my ac this morning. 80 degrees outside, factory ac 70 mustang with all r134 conversion, hoses, compressor and condenser. cruising at 50 im getting 7 to 6 degrees at the vent. that is with a inferred therm up against and pointing into the vent. with it being 110 out i get 22 degrees and 40 degrees at idle. im pretty sure my gauge is right. did i do something wrong when charging it.

JMD

Sounds like you might have done something right to me...

If you get a "real thermometer" that will measure the temperature of the air, (not the vent) It probably wont be quite that cool, 35* air temp with 134a would be a WIN.

Daniel98GT

I dont think theres anything wrong. I wish mine would get that cold lol.

hotrod351

thats what i figured, i must of gotten the amount of freon perfect. lucky, except im getting a new condenser next, plus dryer, so ill have to start over again.

Iskwezm

the air from the vents will be proportional to the ambient air. I was a a/c tech for a loooong time. The avarage vent temp on a cool morning was no less then 28* max. About 33-40 is average.

If it was blowing at 6-7*, your lines would freeze up and it would stop blowing cold air.

unit91

My 68 has 4/40 A/C. Outside air today = 90. Interior air = 89.

KMatch

You're not using the infrared right. The cold air blowing across its face will give a false lower than normal temp as it fogs over internally and can't read heat. With cold a/c air, you need to hold the infrared a bit away from the vent, shooting into it, and "hunting" for the cold spot all from a distance where direct air isn't blasting it. if you sneak up on it in direct airflow, you'll see a real temp of say, 45°, at first. Hold it there a few seconds and it'll drop. That's due to it fogging.

hotrod351

think your right KMatch. 6 orm7 degrees is unbelievable. and yes id think my lines would freeze. well it will be a good test today, seeing as its 116 outside and it will be driven 20 miles uptown at 4:00 PM.

Iskwezm

Good luck, i wish i had A/C. My car WILL NOT get driven on hot days

hotrod351

well my car is my wifes daily driver. she put at least 80,000 miles on it herself. dont reeally know how many miles were on it when i bought it, said 60,000 but the woman said she didnt think that was original. all i knew is that it had factory ac so the wife could drive it to work and back. still doesnt use any oil. i did have harden seats put in it and did a true roller chain, plus dual exhaust.