Choke Theory Question
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
That is not helpful as mine a V8 with 2bbl only has one tube going into the top of the manifold itself. The 9820 tube does not exsist on mine. I even went under the truck and felt around the hex head that the tube is shown attached to and there is no holes in it.
I talked to the engine builder we use a work who has been been building engine for over 40 years. He said all the V8 ford ones of this era he rebuilt has a single tube that went into a blind hole in the exhaust manifold it did not suck exhaust and it did not have a secondary line just the single line from the choke housing.
Which is exactly how mine is and looks nothing like the drawing above.
I talked to the engine builder we use a work who has been been building engine for over 40 years. He said all the V8 ford ones of this era he rebuilt has a single tube that went into a blind hole in the exhaust manifold it did not suck exhaust and it did not have a secondary line just the single line from the choke housing.
Which is exactly how mine is and looks nothing like the drawing above.
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
That is not helpful as mine a V8 with 2bbl only has one tube going into the top of the manifold itself. The 9820 tube does not exsist on mine. I even went under the truck and felt around the hex head that the tube is shown attached to and there is no holes in it.
I talked to the engine builder we use a work who has been been building engine for over 40 years. He said all the V8 ford ones of this era he rebuilt has a single tube that went into a blind hole in the exhaust manifold it did not suck exhaust and it did not have a secondary line just the single line from the choke housing.
I talked to the engine builder we use a work who has been been building engine for over 40 years. He said all the V8 ford ones of this era he rebuilt has a single tube that went into a blind hole in the exhaust manifold it did not suck exhaust and it did not have a secondary line just the single line from the choke housing.
The fresh air tube is there so that your engine receives clean, filtered air. Without it, your choke will pull in dirty, unfiltered air. That unfiltered air not only jams up the choke, but it ultimately ends up inside your engine. Not good.
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
You and your engine builder are mistaken. Your fresh air tube is simply missing; probably broken off in the cap located in the hot air chamber of the exhaust manifold.
The fresh air tube is there so that your engine receives clean, filtered air. Without it, your choke will pull in dirty, unfiltered air. That unfiltered air not only jams up the choke, but it ultimately ends up inside your engine. Not good.
The fresh air tube is there so that your engine receives clean, filtered air. Without it, your choke will pull in dirty, unfiltered air. That unfiltered air not only jams up the choke, but it ultimately ends up inside your engine. Not good.
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
This is not a bolt if anything it is a pipe plug.
But now heres the problem if there is supposed to be a special fitting there then where do you get it. These choke tubes are getting impossible to find other than universal or collector car variants which these trucks are not collectibles.
But now heres the problem if there is supposed to be a special fitting there then where do you get it. These choke tubes are getting impossible to find other than universal or collector car variants which these trucks are not collectibles.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
Maybe it is a compression cap?
http://www.amazon.com/Anderson-Metals-Brass-Compression-Fitting/dp/B0070TUATK
An npt or straight pipe thread to compression ferrule fitting is not hard to come by.
http://www.amazon.com/Anderson-Metals-Brass-Compression-Fitting/dp/B0070TUATK
An npt or straight pipe thread to compression ferrule fitting is not hard to come by.
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
Well I have to decide because I actually found the plug with the hole in the side its round not hex headed and it is not threaded. I also found the mesh filter that goes inside as well pack of five to be exact. Fixing to look for the tubing, based off the illustration guide the fresh air inlet tube is premade but the side to the choke housing is bulk tubing.
Need to figure out how to go about this. Wonder if this being plugged off since before we got the truck could be the cause for the stumble the engine has on acceleration from a stand still. I got 90% of it gone by going to the next step on the accelerator pump.
But if that is a threaded pipe plug in there now I am screwed cause I doubt I could drive him the proper plug and have it seal without some kind of sealant.
Need to figure out how to go about this. Wonder if this being plugged off since before we got the truck could be the cause for the stumble the engine has on acceleration from a stand still. I got 90% of it gone by going to the next step on the accelerator pump.
But if that is a threaded pipe plug in there now I am screwed cause I doubt I could drive him the proper plug and have it seal without some kind of sealant.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Bill - So, when did the 460's get the full electric choke? My '81 shop manual implied that by then they had it.
Galendor - Thanks for the diagram. I added it to the web site: Carburetors & Chokes - Gary's Garagemahal
Galendor - Thanks for the diagram. I added it to the web site: Carburetors & Chokes - Gary's Garagemahal
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Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
Originally Posted by Rusty_S
This is not a bolt if anything it is a pipe plug.
But now heres the problem if there is supposed to be a special fitting there then where do you get it. These choke tubes are getting impossible to find other than universal or collector car variants which these trucks are not collectibles.
But now heres the problem if there is supposed to be a special fitting there then where do you get it. These choke tubes are getting impossible to find other than universal or collector car variants which these trucks are not collectibles.
Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories
This is how I used and modified an aftermarket choke stove kit to work with my headers:
https://www.ford-trucks.com/forums/1...l#post12992946
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
Gary, I didn't think the 460 came back until 1983, my AllData only really goes back to 1982, and interestingly for the F-350 only the 300 and 400 are shown, for 1983 the 460 reappears.
I always thought that the 460 truck engine started in mid 1974 and ended with the 1979 models, then from 1980-82 the biggest engine was the 400 (oink).
I always thought that the 460 truck engine started in mid 1974 and ended with the 1979 models, then from 1980-82 the biggest engine was the 400 (oink).
Lead Driver
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
Here is what the tube fitting looked like and the chamber filter:
Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories
This is how I used and modified an aftermarket choke stove kit to work with my headers:
https://www.ford-trucks.com/forums/1...l#post12992946
Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories
This is how I used and modified an aftermarket choke stove kit to work with my headers:
https://www.ford-trucks.com/forums/1...l#post12992946
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
Originally Posted by Gary Lewis
Rick - I'm going to put a link on my page to your thread since that shows how to fix the perennial problem. Thanks!
I found both the plug and the mesh NOS online but I am un sure of the purpose of the mesh. I also wasn't able to find the pre bent fresh air tube so I have to find out the size so I can order the proper size copper tube for that. Same would have to go for the one that goes to the choke as I have to fab one from scratch which isn't that big of a deal.
I purchased an aftermarket choke stove kit and drilled a second hole on the other end of the choke stove dome that came with the kit in order to use a fresh air tube. I inserted the fresh air tube into that hole and routed it to the carburetor air horn. I purchased one of the mesh filters and placed it inside of a short length of copper tubing. I then placed the copper tubing assembly under the aftermarket choke stove dome that clamps on the exhaust manifold or header. I inserted another tube with insulation on it into the other end of the dome and routed it to the choke cap. This way, the air being drawn is filtered through the choke stove chamber.
That is how I made my own choke stove.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Bill - This 1980 van brochure shows the 460 as an option in the E350, and the factory shop manual covers that. I haven't found an '81 or '82 van brochure to confirm they continued, but I thought they did.
As for the 400 being a pig, I'll agree they weren't very stout in factory guise, but they have LOTS of potential. Lighter weight and longer stroke than a 460.
Rick - Thanks!
As for the 400 being a pig, I'll agree they weren't very stout in factory guise, but they have LOTS of potential. Lighter weight and longer stroke than a 460.
Rick - Thanks!
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
460 in trucks ended in '79, resumed (with the option for manual) in 1983.
Bcmill is correct in the other thread.
The mesh is for heat transfer.
The inlet is already inside the air filter diameter.
Bcmill is correct in the other thread.
The mesh is for heat transfer.
The inlet is already inside the air filter diameter.