Carter AFB inlets/outlets and uses??

[Odin]

I picked up a Carter AFB Competition Series 9636SA four barrel carburetor with an electronic choke built in 2001. I bought a rebuild kit from Mike’s Carburetor Parts and cleaned/rebuilt the carb. I’ll put it on a fresh 318 I’m almost done building, which has vacuum advance, power brakes, and std PCV valve.

Which carburetor inlets and outlets (1,2,3,4,5,6 in photos) do I need and which ones can I cap off?

Can some of you smarter more experienced guys do me a favor and tell me which of the fittings in the photos “should” connector to what? And why one port is better than another for certain uses?

 

[qkcuda]

Here is a picture of mine. PCV and full manifold vacuum on the front. The other plugged outlet is ported vacuum. Large vent on the side capped, small vent open. Electric choke open.

 

[65Val]

qkcuda's pic does pretty well showing the ports to be capped. #3 leave open...that's fresh air for the electric choke.....cap it and the electric choke coil burns out....#1 and #2 are just extra bowl vents for charcoal cannister, etc, if equipped...they can be capped.

 

[Bewy]

The info in post #2 is incorrect. The lower port [ driver side ] is full manifold vac. The pass side is ported vac.

 

[65Val]

The info in post #2 is incorrect. The lower port [ driver side ] is full manifold vac. The pass side is ported vac.

Yes, post #2 is the correct way…ported vac to distributor.

 

[RustyRatRod]

Cap off #1, 2, 3 and 6. #4 to the vacuum advance and #5 to the PCV valve.

 

[RustyRatRod]

qkcuda's pic does pretty well showing the ports to be capped. #3 leave open...that's fresh air for the electric choke.....cap it and the electric choke coil burns out....#1 and #2 are just extra bowl vents for charcoal cannister, etc, if equipped...they can be capped.

I've never in my life heard that one.

 

[65Val]

I've never in my life heard that one.

Which one?

 

[RustyRatRod]

Which one?

Leaving #3 open. If that was the case, there's be no nipple on the end to hold a vacuum line on.

 

[65Val]

Leaving #3 open. If that was the case, there's be no nipple on the end to hold a vacuum line on.

If you look close, there is a nipple right below the black plastic part.

Here’s how my AFB came from the factory…

 

[RustyRatRod]

If you look close, there is a nipple right below the black plastic part.

Here’s how my AFB came from the factory…

View attachment 1716322325

Now, THAT, I can go along with.