RE: A/C and Air pump performance hits
 

I meant to say, "This weekend I confirmed...."

RE: A/C and Air pump performance hits
 

I'm goin' to read a little deeper, and let ya know what I find. It doesn't make sense to me that it would blow into the intake, but I'll try to find out for ya. I'm not real sharp on smog stuff, that's why I have the manual. I have to deal with that "Schmidt" here in Reno, and usually let a mech figure it out when it's time to do a smog check. I should do the preliminary stuff myself though, I'd save a few bucks. :D

RE: A/C and Air pump performance hits
 

Here's what I found.
The A.I.R. pump blows air into the exhaust manifold, near the exhaust valves. There is a check valve in the system. You can remove the check valve and blow through it, toward the exhaust manifold. If you get air flow when you blow though the other way, the check valve is bad and should be replaced. I don't find any indication of the pump blowing into the intake at any point, under normal operating conditions.
In case you are interested, I got my manual from Ecklers. It is the 1980Corvette Shop Manual.
A really good book to have on hand. :)

RE: A/C and Air pump performance hits
 

Starship covered it pretty well. The only connection to the intake was forvacuum to the air diverter valve that released excess air from the pump upon deceleration to prevent exhaust backfire due to an oxygen rich exhaust. If you have air going into the intake manifold, air cleaner, or anywhere but the exhaust manifold, something's wrong. At least base upon the '73 hookup.
A factory manual is a very good thing to have if you are going to maintain these cars. ;)

RE: A/C and Air pump performance hits
 

Thanks for your time and the info!

RE: A/C and Air pump performance hits
 

That's what CF is all about, helping each other out. ;)
You are very welcome. :)