Announcement

**Thirdman** · October 4, 2009, 04:32 PM

John, Thanks for your experience....very helpful. The more personal antedotes and detail the better. Anyone know what temps a good r12 system should produce at/in the vent?

**Guest** · October 4, 2009, 06:00 PM

My 90 Supercoupe runs around 38 deg and I fired up my 66 Tbird and it was around 42 deg. Outside air was 76 deg. Both cars are R12 systems. My 66 has some bubbles in the sight glass so I know its a little low. I know outside air temp/humidity will affect the vent temp but not sure how much.

**Thirdman** · October 4, 2009, 06:30 PM

Thanks for the info. Those are good readings...I think modern systems run about 40-45degrees F.

Thanks

**Thirdman** · October 4, 2009, 11:52 PM

should any desire here are a couple links with some info that i found interesting.

Automotive A/C Vent Temp Range vs System

http://www.refrigeration-engineer.com/forums/showthread.php?t=207

I have a question about the normal air vent temperature ranges that can be expected from the 3 different automotive A/C systems I have read about. 1.Receiver Drier (Filter Drier) - Expansion Valve System 2.Accumulator - Orifice Tube System 3.Suction Throttling Valve System I ask this because I recently purchased a foreign vehicle that uses the Exp valve type system and the vent temperature varies 12degF(34F-46F) within 15 seconds at 2k rpm(all windows and doors open,A/C set to max).

The Automotive Air Conditioning Information Server

http://www.aircondition.com/tech/questions/90/A%7B47%7DC-System-Performance---Ideal-Vent-Temperature

Automotive air conditioning information and industry related news.

this site may be a bit off topic....i found it interesting as it has a graph shoeing the relationship between outside(ambient)temps and vent temps.

Modify the A/C to give cooler temperatures

http://www.fordscorpio.co.uk/acmod.htm

this one is a farenheit/celsius converter for the above link if you need it.