73 equipment identification

[Whaledriver]

I am still trying to identify items on my recent acquisition. My carb has the following items stamped on its base: 0GAV 3B   32/36 17775 and the removable tag screwed on to the top: Weber 72 HF K   1F 15.  Can anyone decify what I have?  Also on the rear of the intake manifold, I have a piece of rubber tubing with a metal blocking rod in it (see picture #17).  I had previously removed it because it looked out of place and replaced it with a rubber cap that blew off when I stared the car. Apparently it has to be blocked off but what was the original purpose of this port?   I also noticed that the distributor vacuum advance port doesn't have a hose attached. Will I have a problem running with the port being attached to a vacuum source ?

 

[Stevenc22]

Weber 32/36 water choke carb

 

Metal blocking rod is just keeping that vacuum port closed.

 

Buy a proper vacuum nipple cap

 

https://www.amazon.com/Dorman-Help-41050-Vacuum-Asst/dp/B000COB5TE/ref=sr_1_4?ie=UTF8&qid=1497286693&sr=8-4&keywords=vacuum+cap

 

That distributor might actually be a vacuum retard distributor so be leaving the vacuum line off, you are not retarding timing, which is a good thing. Get the model number from the distributor to make sure.

 

[Stevenc22]

This device is a vacuum actuated return valve. Make sure it has a vacuum line attached to the nipple underneath. I dont see one.

 

If it does not have one, you can actually remove it and send the fuel direct from the fuel pump to the weber. Remove that fuel pressure gauge if the readings on the fuel pressure are fine. It looks jerry rigged,

 

See my before and after pictures.

[Stevenc22]

Take pictures of this device here and the lines running to it and from it. He appears to be taking ported vacuum into a vacuum canister but im uncertain why. Not stock.

[Mark92131]

1 hour ago, Whaledriver said:

Apparently it has to be blocked off but what was the original purpose of this port?

 

Provided vacuum to the White Electromagnetic Valve on the firewall which controlled the dashpot mounted on the intake manifold for the stock Solex two barrel carb.  See diagram below.

 

Mark92131

 

 

[FunkyLaneO]

1 hour ago, Stevenc22 said:

Take pictures of this device here and the lines running to it and from it. He appears to be taking ported vacuum into a vacuum canister but im uncertain why. Not stock.

That is the charcoal canister, it vents gas fumes to the air cleaner after they have been scrubbed. That air cleaner does not have an attachment for it and a vacuum port is not the proper way to connect it.

[Stevenc22]

^ You think he is using the vacuum to draw on the charcoal canister. Okay. i thought he was using the vacuum to power a vacuum canister. Either way its wrong.

[Mark92131]

4 hours ago, Stevenc22 said:

Either way its wrong.

 

The Charcoal Canister has 2 connections, one is to the blue plastic line that runs along side the fuel supply line inside the car and connects to the plastic tank under the parcel shelf on passenger side, that plastic tank also has a connection to the gas filler neck.  The other connection to the charcoal canister is a hose that runs to a nipple on the bottom of the OEM stock air cleaner.  Gas fumes from the tank expand into the plastic tank under parcel shelf, and when the car is running, vacuum pulls those fumes through the charcoal canister and into the air cleaner to be burned.

 

If you look at the smog diagram above, the illustration shows a vacuum connection that makes a "J" hook and doesn't connect to anything.  That vacuum connection off the OEM 2 barrel Solex actually connects to a fitting on the OEM Air Cleaner Canister just above the connector from the valve cover to the air cleaner to assist in drawing crankcase fumes into the carb.

 

Mark92131

[Whaledriver]

I traced the small hoses emanating from the canister. The canister has two pipes. One is  attached to a very long hose receiving venting all the way back  from the fuel tank.   A second short hose runs from the remaining canister pipe to the base of the carburetor providing suction to remove  the canister's filtered fuel vented air to be burned in combustion.  I guess if you weren't concerned with trapping the vented fuel gases to the atmosphere, you could just eliminate the canister and plug the hole at the base of the carb and eliminate an additional hose cluttering up the engine compartment.

Edited June 13, 2017 by Whaledriver

[Stevenc22]

That connection at the base of the carb is the connection for the distributor. It's called ported vacuum. 

 

I would remove the charcoal canister, plug the carb port and let the line from the fuel tank vent to atmosphere.