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Old 03-05-2012, 12:45 AM
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Holley 4160/600 CFM Carburetor: Components Identification

Hi All,


I need help identifying the various components on a Holley 4160 carburetor.


Today, I'd like to focus on ports. Below is a picture of the carburetor with the ports circled and labeled. When responding, please use the alphabet labels.


From what I can tell/guess:

A: Brake booster
B: PCV / Vacuum port
C: HEI / Vacuum port
D: Fuel inlet



Thanks in advance


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Old 03-05-2012, 11:03 AM
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"B" is not a vacuum port for PCV. That is air inlet to open the choke. There is a "U" shape line that is missing and is connect to a tube(missing) that is pressed just above choke housing. Inserting a plug will prevent the choke flap not to open at start up.
"A" Is not just for the brake booster, It's also the PCV vacuum port.
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Last edited by lg1969; 03-05-2012 at 11:23 AM.
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Old 03-05-2012, 12:31 PM
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holley carbs

A is pcv only,B is for heat from the ex to regulate the choke,this carb has elc choke conversion, not oem.the small tube is for the vacume advance(ford style)the larger tube is gas
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Old 03-05-2012, 01:25 PM
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The PCV port can be use to run brake booster if there is no port on the manifold.
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Old 03-05-2012, 02:39 PM
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Hey lq1969 and cliff,


First off, thank you both for the helpful responses. Definitely appreciate the editing of the picture so I can see what you mean. My only experience with carburetors so far has been the Q-jet, so I thought I would play it safe and ask before installing and setting this one up.


Now, as you guys have mentioned, port "A" can be used for PCV or brake booster, provided there is no port on the intake manifold for the brake booster. I will check to see if the intake manifold has a port for the booster.


Port "B" is an air inlet for what I assume would have been the hot air choke? Since the electric choke conversion has been done, I might as well leave it plugged up.


Port "C", the small inlet is for the Ford -style vacuum advance, but I assume is fine to use on a GM HEI?


Again, thanks for the help!
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Old 03-05-2012, 03:13 PM
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Do not leave it plug. you need to leave it open. The choke may not open at start up
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Old 03-05-2012, 03:14 PM
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Quote:
Originally Posted by lg1969
Do not leave it plug. you need to leave it open. The choke may not open at start up
Got it. Will I need the U-shapped line, or will it work just fine without it?
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Old 03-05-2012, 03:58 PM
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just leave it open or run a up into filtered source from an air cleaner after the air filter.

Last edited by lg1969; 03-05-2012 at 04:05 PM.
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Old 03-05-2012, 04:46 PM
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BTW: The accelerator spring is not setup right. It's all compressed. If you hit the gas pedal hard it could rupture the pump diaphragm. Gasoline is not compressible.
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Old 03-05-2012, 05:07 PM
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Quote:
Originally Posted by lg1969
just leave it open or run a up into filtered source from an air cleaner after the air filter.
If I end up using this carb, I'm thinking of using a carb hat with a custom-made intake (probably cold air) with some sort of a provision where a hose from this inlet can be hooked up to it. What are your thoughts on this?




Quote:
Originally Posted by lg1969
BTW: The accelerator spring is not setup right. It's all compressed. If you hit the gas pedal hard it could rupture the pump diaphragm. Gasoline is not compressible.
Would the accelerator spring be the one circled in yellow in the image below? What is the proper setting for it, or does it vary depending on the set up?


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Old 03-05-2012, 09:44 PM
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Quote:
Originally Posted by lg1969
The PCV port can be use to run brake booster if there is no port on the manifold.
not wise,unrestricted vacume source is esential for pbrakes.re choke the the heat tube should stay closed with elc.choke,the vacume source was only needed when non elctric choke used as it needed a good flow of heated air to expand the coil and open choke
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Old 03-05-2012, 09:51 PM
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I have seen it done. They use a "T" to connect the brake booster and PVC.
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Old 03-05-2012, 10:10 PM
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Quote:
Originally Posted by lg1969
I have seen it done. They use a "T" to connect the brake booster and PVC.
dont dought some 1 has put a t in but that does not make it corect,.re the small vacume line the ford port is not for a gm distributor, they use manifold vacume.
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Old 03-06-2012, 07:46 AM
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Instructions Carburetor/Choke PDF's

http://www.holley.com/data/Products/...7948-5rev3.pdf

http://www.holley.com/data/Products/...R7972-4rev.pdf
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Old 03-06-2012, 10:21 AM
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Thanks Nolan! Those were very helpful!
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