The amount of air being pushed through the ducts isnt enough i removed the ducts and it seems like there is plenty coming from the heater box THE DUCT FAN MAKES PLENTY OF NOISE WHEN THE AC IS ON I PUT NEW HOSES, COMPRESSOR , ACCUMULATOR, REPLACED THE ORAFACE/SCREEN ANY SUGGESTIONS ON MAKING THIS SYSTEM WORK BETTER WILL BE GREATLY APPRECIATED THANK YOU

 

is the problem air flow or temperature? if there is plenty of air coming from the heater box and no obstructions that is all you will get as far as flow.

 

I had a similar situation on my 81. My problem was a vacuum leak which was interfering with the blend door and other vacuum HVAC functions. My leak was in the T fitting in which a 3/8 inch line had a 1/8 inch line running to the center if the firewall by the blower relay. In the picture it is the small line between the blower relay and a much larger vacuum line. Fixing the vacuum leak at the T fitting was a snap. Auitozone
sells a replacement T for $2

 

You might also make sure the ducts are tight where they are connected.If loose, some of your air could be going behind the dash. You might seal the connections with what else, duct tape.You should also check the vent connections for the same problem.
Good Luck,
Bill

 

More than likely the A/C is working fine. I had the same trouble with my 79 and I used the suggestions from a book by Michael J Davis called AIR CONDITIONING STRATEGIES for the 63-82 CORVETTE published by Prestige Publishing. Your problem is a common one and not a quick fix but don't let that get you down. I did most of his tricks to mine and got the cabin temp down 20 degrees. Vent temps dropped from upper 70's to to lower 50's! No lie! You can chill beer with mine.
I think I bought mine from Ecklers but not sure. It's been years ago. Try Amazon.
Hope this helps and good luck.

P.S. 134a works just fine.

 

This same guy also wrote a book on C3 water leaks for anyone interested.

 

i have seen problems with no air coming oujt of the vents...turned out some one had replaced the blower and hooked the wires backwards,the motor was running in reverse.swap the wires back and blows fine.

 

C4 squirrel cage works great but is a bit longer so you have to fabricate a spacer. 20 something at Advance Auto and worth every cent. It's the first step.
Hey, I did that all that crap in the book and it freaking works.
Give it a try. It'll make your GF's nipples proud. Her make-up won't melt off before you get to dinner and you might look cool and get lucky that night

 

That book is $167.39 new on Amazon!

The water leaks book is $462.80! Holy cow! I could just about pay someone to fix and save some money!

 

Sorry for the sticker shock fellows. I had no idea I was sitting on gold. I bought both books for less than 20 bucks! I thought about getting my little girl to copy it to a PDF file or something. I dunno. Is that legal? Any lawyers out there?

 

Not a lawyer, but you can read all about it here.. http://www.copyright.gov/laws/ and no it is not legal.

There are certain exclusions based on the age of the document. Anything published prior to 1922 has entered what is called the "Public" domain. Anything newer can be renewed..

For any work published prior to 1978 (with proper copyright (©) notice), copyright lasted for an initial term of 28 years, renewable in the 28th year at first for an additional 28 years, then (with the 1976 Copyright Act but actually beginning in 1961 or 1962) for an additional 47 years, and finally (with the Sonny Bono Copyright Term Extension Act of 1998) for an additional 67 years. If a work published prior to 1964 was not formally renewed, it entered the public domain when the initial 28-year term expired. (For works published after 1963, renewal became automatic in 1992.) If the copyright was renewed, the term was thus 75 years from the year of publication (expiring on Dec. 31 of the 75th year following the initial publication) until the Sonny Bono act extended this to 95 years. (Note, however, that if a work with a foreign author went into the U.S. public domain because of a failure to follow formalities of prior U.S. copyright law (typically publication without copyright notice or failure to renew), copyright was RESTORED by section 514 of the Uruguay Round Agreements Act of 1994, codified at 17 U.S.C. section 104A. This constitutionality of this restoration of expired copyrights is being is being judically challenged in the Golan case. See Challenge to Constitutionality.)

 

Thanks Willcox. Thats all I needed to know. You're on your on fellows but if you can get your hands on a copy of either one it's got great info.