Hey guys, I recently purchased a 72 Delta Royale Vert and I am changing out the fuel pump and carburetor. I have a question on a part I can't identify. Please see the attached pictures for the circled item and the arrows pointing to the metal tube coming from the carb. The metal tube connected to the back of the carb seemed to be attached to the circled part and is now broken off. Please let me know what this part is called, what it's for, and if it can be replaced. Any assistance is greatly appreciated. Thanks

 

That is the hot air for the choke. The tube is separate from the plate but it appears to be rusted through where it attaches. Don't know if it is still available.

 

Thanks for the reply. Sorry, I'm new to this. Will this affect how the car runs? Should I go with an electric choke if there is no replacement for this part.

 

An electric choke would be an excellent replacement. I think there is a vacuum port under the choke housing that might need to be plugged.

 

Thanks again. I will search for some how to instructions. Hopefully it's not too difficult to install.

 

Easy. Just search for Joe_Padovano's thread on the subject.

- Eric

 

If you have the remains of the old pipe contact The Right Stuff Detailing for them to make a replacement.

 

I believe In Line Tube, Fusick's or The Parts Place have the part available you need.

 

I believe the rear line is for anti-icing or something to that effect.

 

The rear line is the air feed.
It draws from inside of the air cleaner so that the air that comes in is free of crud and bugs.

- Eric

 

The hot air tubes are a closed system other then the small vacuum bleed in the choke. How can this draw air? They work against one another. The choke receives hot air to operate and the air horn draws in heated air from the rear tube to stop icing.

The bug thing is a joke right?

 

Au contraire.

I couldn't find a diagram to illustrate this, so please bear with me:

• The carburetor has a metered air bleed from the choke chamber into the venturi, which provides vacuum to the choke chamber, under the big round plastic choke cover.
• The rear of the choke chamber has a threaded flange fitting, to which a metal tube is connected.
• This tube goes into a well in the intake manifold, which sits right in the stream of the exhaust crossover, makes a turn or two, and then emerges again.
• The end of the tube that emerges is connected via a short length of hose to a nipple high on the back of the carburetor.
• This nipple connects to a passage which goes through the body of the airhorn, right between the two secondaries, above the air flaps.
  This location places it, barometrically, in normal atmospheric air, above the throttle plates, the venturis, and the choke plates, but within the filtered area of the air cleaner.

So, the air bleed sucks in air, which enters through the air cleaner snorkel, through the filter element, through the nipple fitting at the back, through the little rubber hose, through the metal pipe, through the well in the intake manifold, where it picks up heat, then to the choke chamber, where it warms up the choke spring as the engine begins to warm up (as the exhaust gasses in the crossover heat the intake well), causing the choke spring to open the choke plates, and the air is sucked through the air bleed into the engine.

- Eric