A/C question for R22Tech or other experts
 

Can anyone tell me what the high and low side pressure readings should be for my A/C? Car is an '88 coupe with the original system (Nippondenso compressor) if it makes a difference. I'm not experiencing any problems now - knock on wood - but when I eventually have to recharge the system I want to do it correctly. And, yes, I have a section 609 license to buy R-12. Why do I feel like the refrigerant market must be like the crack market http://www.pelicanparts.com/ultimate/smile.gif

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Rod Walter
'88 911 coupe

Hey i'm no expert, but I am working on my 88 a/c sys right now. With the advice of r22tech, he said, and this is no quote, the high side should be around the 150psi range.
And the low side around 30psi.

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Derk Pitt
88 Carrera Coupe

Thanks, Derk, for your reply! Hey, what's an AMT?

(A dope slap to the side of my own head!!!) I just looked in the Bentley manual again and found the specs:

at 25 degrees C. ambient and 2000 rpm

Low side....12 - 30 psi
High side...115 - 205 psi

in the event that anyone else has a need to know.


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Rod Walter
'88 911 coupe

[This message has been edited by Rod Walter (edited 07-15-2001).]

Those figures are correct-I charge mine with the RPM around 2700 though. 30/150 ave. psi

NOTE: Always charge and check pressure with the decklid CLOSED, in case you forgot.

Rod,

An AMT may be an Aviation Maintenance Tech... aircraft mechanic. Did it for many years...

JA

You are correct, Sir!

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Derk Pitt
88 Carrera Coupe

Hey, Derk. How's the a/c doing? Just wanted to thank you for the sleeve/duct. It worked like a charm and now I have much more air velocity coming into the cabin!

Thanks, Joe and R22tech, for the info. I won't forget to close the decklid (I hope).

Derk, working on the 911 must seem like a piece of cake considering the tolerances and records required for aircraft.

Joe, why did you leave that career? I understand that there is a shortage of good people in that line of work.

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Rod Walter
'88 911 coupe

Well this is my first Porsche. And it's a little different. I finally got a new dryer.
But the truck's at the body shop getting a little sheet metal [opps]. Should have it back tomorrow. Maybe this weekend I'll put in the dryer and vacuum it down, [all day].

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Derk Pitt
88 Carrera Coupe

Rod,

Was forced, kicking and screaming out of doing aircraft maintenance! Some jerk forced me into the right seat of the airplane and told me I was now a copilot. That was in 1983 and now for some reason people think that I can fly the things!

You are totally correct. If you know of anyone who wants a good career, aviation maintainence and repair is a very good field, especially if you are either computer or electronics friendly. Home every night and its a very good job. Salaries are coming up as there is a extreme shortage of experienced people in the field now.

I was an teacher and examiner with AMT's for a while and may go back into this area when I get tired of staying in hotel rooms all the time! I still restore old fabric airplanes for a hobby just to keep my sanity.

Take care,

Joe

Derk,

Pls let me know if you see a real difference with the new dryer in the system. I have a new one stashed in the garage that I was going to save for when I switch over to R134 and am curious...

JA

Wow, a mechanic friendly pilot, great to meet one of those.
After looking in to the A/C sys on 911's.
I see know reason that the air shouldn't be as cold or even colder than other cars [ricers].
I'll let you know how it works out.

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Derk Pitt
88 Carrera Coupe