The Ford Barn

Art Bjornestad · 07-12-2010, 01:36 PM

I just bought a B carb and the upper body has a small aluminum disk with the # 2405 stamped on it. Any ideas about this disk? Also need to know how to positively identify that the venturi is correct. This one has D 7631 cast into it and I cannot locate this # in the green book.

Model A Mechanic · 07-12-2010, 01:45 PM

Art-- I have one just like your's, excepty disk is brass. I think it might be manufactured by Simmons. It runs best at 35 mph or higher. Try it you'll like it. I run the one I have on a A manifold.

Greg, Downey,Ca.

Art Bjornestad · 07-12-2010, 02:14 PM

Greg, that may well be as the area where Zenith would normally be has been ground smooth. Any ideas on venturis?

Bruce Lancaster · 07-12-2010, 02:47 PM

I think most iron Zenith carbs carry their numbers on a riveted disk, but not the original Ford ones. I have a few B variant carbs with discs carrying cryptic numbers, but these are not actual Ford ones.

Richard Lorenz · 07-12-2010, 03:58 PM

I'm going by my memory which is that the 2405 and 2415 Zeniths have cast iron tops and pot metal bottoms. They are very different from the B Zeniths that are commonly called B1 and B2 Zeniths.

Dave in MN · 07-12-2010, 05:01 PM

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This Spring I sent two carbs to Dave Renner (Renner's Corner) for setup/rebuilding and air filter porting. He mentioned one of them was for a stationary power plant application and it had a riveted tag on it. The other was devoid of tag or any sign of tag being on it. I assumed he meant the other (un-tagged) one was for a "B" car application.
Tagged = non Model B use?
Untagged = Model B use?
Anyone know for sure? Thanks!
Good Day!
Dave in MN

Ron in Quincy · 07-12-2010, 05:15 PM

All the original B, C Ford Zenith carburetors I have rebuilt over the years have NOT had any tags on them; also they are all cast iron.

Ron

ursus · 07-12-2010, 05:33 PM

Zenith made a variety of later carbs using the Model-B casting. All of those I have seen without the riveted disc were, judging from components and performance, identical to the typical Model-B carb. Those with the numbered discs riveted to the upper casting above the float bowl were intended for some other use. Most common is the one made for replacement on the Model-A, which features a 20mm venturi and a larger bore #56 inlet valve. The Model-B had a 22mm venturi and #44 inlet valve. However, there is a lot of mixing of parts over the years so you will have to check all of the jets and venturi to determine if this carb will perform well on an "A" or "B" engine. Some of these were designed for industrial or stationary engine use and don't perform very well on a car. The Zenith B-casting sold for replacement on the Model-A forks very well and may even give better gas mileage around town.

ursus · 07-12-2010, 05:36 PM

Oops. I meant "works very well" not "forks very well". Gotta read before posting!

Bruce Lancaster · 07-13-2010, 09:39 AM

The variety of the non-Ford ones is amazing...each one I find is different, with immediately noticeable different passages in the casting. I think all I have lack the Ford GAV, and one contained a 26MM venturi...the area difference between the 22 and the 26 is a lot more than one might assume! That piece will wind up in a top secret "Boss 200.5" motor with some bigger jets to match...

FL&WVMIKE · 07-13-2010, 05:13 PM

"B" FORDERS .......................
You guys have ruined my life. I've had this carburetor for years and thought that I had a really nice unmolested "B" carburetor. I guess that I do not !
The number, cast into the side, is 124 1/2 T. I think it is a "T". I'm sure it is totally cast iron.
Do any of you experts know what this is ?
Note the different fuel inlet and linkages.
Thank you,
MIKE

CLICK ON PHOTOS TO ENLARGE

Ken/SC · 07-13-2010, 08:44 PM

Not like the Zenith model "B" on my A. The air intake and top linkages are all wrong.
There is not even a choke linkage that I can tell.
I think that is an early tractor carb. Go to Vince Falter's website. He has pictures of
all the zenith model "B" variations.

FL&WVMIKE · 07-14-2010, 12:03 PM

Ken/SC .......................
Yes, the carburetor does have choke linkages. You can see them, in the center photo, on the R/H side of the picture.
Thank you,
MIKE

FL&WVMIKE · 07-14-2010, 12:19 PM

forever4 ........................
Thank you for the information. From the outside, the top section, seems to be the same. But the bottom section seems to be partially mirrored. The outside rib is on the skinny side of my carburetor.
This is all a new revelation to me. Do you think that my carburetor is from a tractor ? It is almost mint. That is the original paint.
Thanks again,
MIKE

JoeWay · 07-14-2010, 01:17 PM

Quote:

Originally Posted by FL&WVMIKE

Ken/SC .......................
Yes, the carburetor does have choke linkages. You can see them, in the center photo, on the R/H side of the picture.
Thank you,
MIKE

My guess is that Ken meant to say GAV.

Either way, the choke is on the wrong side. It's definitely not an "A" or "B" carb.

Joe

07-12-2010, 01:36 PM	#1
Art Bjornestad Senior Member Join Date: May 2010 Location: Westlake Village, CA Posts: 477	Model b carb question I just bought a B carb and the upper body has a small aluminum disk with the # 2405 stamped on it. Any ideas about this disk? Also need to know how to positively identify that the venturi is correct. This one has D 7631 cast into it and I cannot locate this # in the green book.

07-12-2010, 01:45 PM	#2
Model A Mechanic Junior Member Join Date: May 2010 Posts: 3	Re: Model b carb question Art-- I have one just like your's, excepty disk is brass. I think it might be manufactured by Simmons. It runs best at 35 mph or higher. Try it you'll like it. I run the one I have on a A manifold. Greg, Downey,Ca.

07-12-2010, 02:14 PM	#3
Art Bjornestad Senior Member Join Date: May 2010 Location: Westlake Village, CA Posts: 477	Re: Model b carb question Greg, that may well be as the area where Zenith would normally be has been ground smooth. Any ideas on venturis?

07-12-2010, 05:01 PM	#6
Dave in MN Senior Member Join Date: May 2010 Location: Jordan, MN Posts: 1,411	Tagged vs non-tagged Model b carb question Sponsored Links (Register now to hide all advertisements) This Spring I sent two carbs to Dave Renner (Renner's Corner) for setup/rebuilding and air filter porting. He mentioned one of them was for a stationary power plant application and it had a riveted tag on it. The other was devoid of tag or any sign of tag being on it. I assumed he meant the other (un-tagged) one was for a "B" car application. Tagged = non Model B use? Untagged = Model B use? Anyone know for sure? Thanks! Good Day! Dave in MN

07-12-2010, 05:15 PM	#7
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: Model b carb question All the original B, C Ford Zenith carburetors I have rebuilt over the years have NOT had any tags on them; also they are all cast iron. Ron

07-12-2010, 02:47 PM	#4
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Model b carb question I think most iron Zenith carbs carry their numbers on a riveted disk, but not the original Ford ones. I have a few B variant carbs with discs carrying cryptic numbers, but these are not actual Ford ones.

07-12-2010, 03:58 PM	#5
Richard Lorenz Senior Member Join Date: May 2010 Posts: 447	Re: Model b carb question I'm going by my memory which is that the 2405 and 2415 Zeniths have cast iron tops and pot metal bottoms. They are very different from the B Zeniths that are commonly called B1 and B2 Zeniths.

07-12-2010, 05:33 PM	#8
ursus Senior Member Join Date: May 2010 Location: Oregon Posts: 1,374	Re: Model b carb question Zenith made a variety of later carbs using the Model-B casting. All of those I have seen without the riveted disc were, judging from components and performance, identical to the typical Model-B carb. Those with the numbered discs riveted to the upper casting above the float bowl were intended for some other use. Most common is the one made for replacement on the Model-A, which features a 20mm venturi and a larger bore #56 inlet valve. The Model-B had a 22mm venturi and #44 inlet valve. However, there is a lot of mixing of parts over the years so you will have to check all of the jets and venturi to determine if this carb will perform well on an "A" or "B" engine. Some of these were designed for industrial or stationary engine use and don't perform very well on a car. The Zenith B-casting sold for replacement on the Model-A forks very well and may even give better gas mileage around town.

07-12-2010, 05:36 PM	#9
ursus Senior Member Join Date: May 2010 Location: Oregon Posts: 1,374	Re: Model b carb question Oops. I meant "works very well" not "forks very well". Gotta read before posting!

07-13-2010, 09:39 AM	#10
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Model b carb question The variety of the non-Ford ones is amazing...each one I find is different, with immediately noticeable different passages in the casting. I think all I have lack the Ford GAV, and one contained a 26MM venturi...the area difference between the 22 and the 26 is a lot more than one might assume! That piece will wind up in a top secret "Boss 200.5" motor with some bigger jets to match...

07-13-2010, 08:44 PM	#12
Ken/SC Member Join Date: May 2010 Location: South Carolina Posts: 92	Re: Model b carb question Not like the Zenith model "B" on my A. The air intake and top linkages are all wrong. There is not even a choke linkage that I can tell. I think that is an early tractor carb. Go to Vince Falter's website. He has pictures of all the zenith model "B" variations.

07-14-2010, 12:03 PM	#13
FL&WVMIKE Senior Member Join Date: May 2010 Location: Daytona Beach, Fl & Spencer, W. Va, Posts: 4,442	Re: Model b carb question Ken/SC ....................... Yes, the carburetor does have choke linkages. You can see them, in the center photo, on the R/H side of the picture. Thank you, MIKE

07-14-2010, 12:19 PM	#14
FL&WVMIKE Senior Member Join Date: May 2010 Location: Daytona Beach, Fl & Spencer, W. Va, Posts: 4,442	Re: Model b carb question forever4 ........................ Thank you for the information. From the outside, the top section, seems to be the same. But the bottom section seems to be partially mirrored. The outside rib is on the skinny side of my carburetor. This is all a new revelation to me. Do you think that my carburetor is from a tractor ? It is almost mint. That is the original paint. Thanks again, MIKE