240sx A/C system question. I need everyone's help

[iwishiwas-all*]

Well for my senior designfor me Mech engineering degree, I am doing an interesting project involving my car. I however need some information which I hope you guys can help me with.

For a 240sx (s13 or s14), I need to know the air temperature leaving the vents of your air conditioner at FULL COLD and FULL FAN SPEED.

with my sr20, I disconnected the a/c and never put it back on (I need to)
so I am calling on you all to get me these temps.

The flow rate I can get because my fan still works.
Please help guys, the closer to the vent the better, hell if you can stick a probe down the a/c vent and get a temp reading it would be GREAT

THANKS!!!!!!!

****EDIT****

Please only people with proper running a/c, if your system gets cold, I would like to know how cold.
If it needs a recharge, you dont have to bother , hehe
thanks

[fliprayzin240sx]

Well, when I got my system fixed out here, they hooked up a thermo into the vent. The guy who was looking at it said that it needs to drop to less than 15 degree, 10 would be ideal.

[projectRDM]

Kinda of a loaded question. Every car is going to operate slightly different based on type of refrigerant, ambient temperature, humidity, airflow (driving or idling), system pressure, etc. There's a ton of variables to account for. On a cold day in the mountains the A/C will blow colder than a hot day by the beach.

Ideally a car should blow about 45 degrees on low speed. On high speed the air is heated more as the velocity increases temperature so you'll see maybe 50-55.

[airhead]

just went from r-12 to r-134a
on my sr

so cold i need to turn it off and roll windows down lol

[Goose]

R12 is colder then r134a. Also if you're hitting 15 degrees out the vents your car is broken and you would have some part freezing issues. nissan says anything 38-45 degrees is normal vent temps

[iwishiwas-all*]

yes, I sort of meant leaving the heat exchanger, I know the temps can vary greatly, I only want round-about numbers. I just need to know the presumed temp drop across the heat exchanger under the dash, so the farther in the vent I can get a temp the better ( this may also help in getting more consistent readings.

As far as the 10-15 degrees ( I am guessing degrees C, you are in japan), I called an A/C shop in my area asking similar questions, and he stated that that vent temps are very close to 45-55 degrees F and that it can reach as close as 25 degrees F right post HeatXchanger.

So this adds up for the most part. thanks alot guys. I think you may like my project too, but first I must do some calculations in order to determine if it is feasable. thanks