carbking
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Posts posted by carbking
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We have neither wings nor halos (we do make mistakes).
What should be in CS-526 are a pair of 120-163 primary jets, which should measure 0.098 inch. They will not be stamped.
As I mentioned in my previous post, we would occasionally see the primary and secondary jets on a Carter switched, as the secondary throttle bores are often larger than the primaries. The "rebuilder" didn't consider the metering rods. This was not a chronic problem, but probably have seen a couple of dozen "rebuilt" in this manner. Of course, when the engine transitions from the idle circuit to the main circuit, it flat falls on its face!
The secondary jets are MUCH smaller. As the kit is used on a couple of different carbs, cannot tell you the exact size of the secondary jet unless you wrote down the carb identification number, but the secondaries are in the 0.052~0.056 inch range.
Jon
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If you got one of our kits, there would have been two PRIMARY jets in the kit that would have been the size specified by the manufacturer.
We do not include secondary jets in our kit, as they are rarely needed, and would just increase the price of the kit. We do have them available.
If the kit came from elsewhere, I cannot comment.
Something that occasionally causes some folks concern is the relative size of the jets. With Carter 4-barrels, the smaller diameter jets will be the secondary jets, even though the secondary throttle bores are often larger than the primary. The primary jets have the metering rods going through the jet, thus must be larger.
This is different from Holley and Rochester, where the secondary jets are generally larger than the primary, as the secondary throttle bores are generally larger than the primary.
One other comment about jets:
NEVER believe a number stamped on a jet! Folks have been drilling jets since 5 nanoseconds after the first carburetor with jets was delivered. MEASURE!
Jon
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Steve - yes, the number on the brass tag.
I have both the BB1D and the 517s (there should be a 5 in front of the 17s).
Someone on here will want the BB1D.
Jon
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Peter - the manufacturer has a 350 page manual that covers every contigency in detail for chrome plating and chromate conversion on zinc. 375 of those pages are dedicated to safety. Not a bad idea, as chrome is DANGEROUS, as is the chromate conversion. I have no interest in doing these, just in the copy cad.
The copy cad is not real cadmium, but a look-alike, I think using zinc. Trying to find out a real world procedure from someone who uses it.
While I am paranoid about safety in my shop, if I have to wear a hazmat suit to zinc plate a few carburetor linkage items (for convenience, not economy), then I will sell the unopened kit at a loss; and continue to mail plating to a custom plater.
Jon
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57 minutes ago, Grimy said:
I've found that marine shut off valves these days have diaphragms that are adversely affected by ethanol. I look at swap meets for vintage ones that have no diaphragms, simply brass cup-and-cone construction--they seem to last indefinitely or until the mating parts become eroded.
The brass ones are still available new; but given the country of origin, the "cone" is probably square!
Jon
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I failed to see the "pint" comment.
Do you have a cat in the garage using the catch can as a restroom?
The liquid color would be about the same.
I would agree with gamekit that the shutoff valve is faulty.
Jon
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About 65 years ago, we lived on a farm, and had a pair of John Deere tractors. I ran the newer (1951) model, and Dad used the older (1940) model.
Dad told me "ALWAYS shut off the fuel valve, and allow the engine to run out of gas before turning off the key. These tractors have gravity feed to the carburetor, and a spot of dirt will cause the carburetor to leak".
One day, came in for lunch, both for me and the tractor, and was in a hurry. Turned off the key, filled the gas tank, and when in for lunch. When I returned from lunch, there was a "wet spot" of approximately 14 gallons of gas under the tractor.
My Dad never went to college, but he was one wise man!
He said "fill the tank, you can't plow with an empty tank".
He then hooked a chain from his tractor to mine, and pulled me away from the wet spot (which more or less dried in a few days), and we went back to the field.
NOT ANOTHER WORD WAS SAID ABOUT SHUTTING OFF THE FUEL, AND NONE WAS NEEDED!
There was no punishment, except in my mind.
I guess 14 gallons of 10 cent gasoline was a pretty cheap lesson!
An electrical relay, with an electrical shut-off valve (like is used with dual fuel gasoline/propane systems) wired into the ignition system will prevent the issue.
Jon
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Anyone here use Caswell's Copy Cad home plating outfit that would answer a couple of questions for setting mine up?
Thanks
Jon
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Updated 14 March - acquired the BB1D in a trade, so now have one of each of the Universals, and one of each of the Chevrolets, including the Chevrolet variations.
Updated list:
Numbered 257s, 262s, 586s, 638s, 640s, 641s, 2035s, 2212s, 3377s, 4403s
Coded 4A1, 6A1, 6B1, 6B2, 6C1, 6C2, 6D1, 6D1R, 6F1, 6J2, 6J3, 6K2, 6K3, 6N1
Surely someone has some of these squirreled away.
Will buy, trade for, whatever; and I have some pretty good trade bait!
Jon
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Check my previous post. Tom at Then and Now should be able to identify the origin of your fuel pump, and should have a rebuilding kit available.
Jon
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See thread 1964 Buick 3665s in the General Discussion forum.
Jon
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I spent the last hour and a half scanning this thing (I don't have the $12,000 scanner to do it easily
)
As reported in the other thread, the tag is on the pump side of the carb in the rear.
The tag is part number 107-32 and is BLACK!
The carburetor was released to production on 2 May 1963.
Jon
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The TX-2 is what is referred to as an S.A.E. size 2 carburetor.
The S.A.E. size 2 carbs were listed as being a "nominal" 1 1/4 inch carburetor.
This terminology confused some early documentationalists.
I don't have a good one to measure, but most Stromberg size 2 carbs have a 1 and 7/16 inch throttle bore.
The size 3 would be 1 11/16 inches.
The Carter BB-1 289s or later 289sd both have 1 1/16 inch venturii.
As all BB-1 Carters are straight flange, either would require a cross-flange adapter.
Jon
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Wayne - think outside the box!
Maybe Tom will have the tag color (should be unique for a specific carburetor identification number).
Make a trip to the store, and look for beverage cans (anodized aluminum). Find one (hopefully with a beverage you enjoy), buy the can, drink (or drain) the beverage, and use the tag shape you have as a pattern, and cut your own tag!
Jon
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The Packard 1934 Super 8 used fuel valve assembly P-18914.
P-18914 is composed of P-17924 seat, P-10666 gasket, and P-17810 valve - no clip.
Jon
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I don't have all of the Carter prints digitized. If the identification number is supplied, I will check to see if I have a microfilm copy.
I checked a LOT of Chevrolet and Pontiac prints, and all had the tag on the pump side of the carburetor, the screw in the back (2 o'clock).
Some of the later Chrysler carbs had the tag on the pump side, under the screw just to the left of the pump.
Jon
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The long answer:
The original Senior 6 was equipped with a Stromberg TX-2, with a 1 3/32 venturi (largest venturi Stromberg put in the TX-2).
THE CARBURETOR WAS TOO SMALL!
Stromberg also found that the 1 3/32 venturi was TOO LARGE FOR THE THROTTLE BORE OF THE TX-2, impacting the vacuum signal.
The largest venturi I have found in the UX-2 is 1 1/16 (same throttle bore as the TX-2).
VERY EARLY in the life of the Senior 6, the TX-2 was replaced by the UX-3 with a 1 1/8 inch venturi. As the UX-3 has a larger throttle bore, the venturi could also be larger.
Jon
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The short answer:
Stromberg did NOT sell a UX-2 to Dodge for the Senior 6.
Jon
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The letters/numbers stamped on the rectangular brass tag by the choke lever should allow identification of the carb.
Looks like a tractor carb to me.
Jon
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From "GM Folks Magazine" June 1940, Vol 3, Issue 6.
Pretty high tech stuff for 1940
Jon
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Most Stromberg OE-1 carbs were brass; a few were aluminum. I am not aware of one that is zinc alloy.
Jon
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1934 Buicks for domestic (US) sales:
40 series would have a downdraft duplex (2 barrel) carb, either Stromberg or Marvel
50 series would have an updraft duplex (2 barrel) carb, made by Marvel
50 series would have a pressure fuel pump, A.C. number 1521538.
How much of the above is applicable to export, I do not know
Fuel pump rebuilding kits, if needed, may be acquired from "Then and Now Automotive" in South Weymouth, MA. Tom will want to know the number (generally 4 or 5, but sometimes all 7 digits) stamped on the edge of the mounting flange.
Carburetor rebuilding kits, if needed, may be acquired from "The Carburetor Shop" in Eldon, Missouri. The TINY 10-???? number stamped on the UNDERSIDE of the carburetor is required.
QUOTE: "It also suffers from cutting out due to an intermittent fuel issue" END QUOTE
If in fact there is a pressure pump, the "intermittent fuel issue" may be ignition rather than fuel.
I apologize for the quality of the picture; I do not have an easy way to convert PDF files to a format that this forum likes. The only easy way is to snap a picture with the cell phone, which can easily be converted. The picture is high resolution, so it may be downloaded in a format your computer likes.
Jon
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On 3/6/2024 at 12:10 PM, neil morse said:
From the manual:
The chart is incomplete, as is much data in repair manuals, as they are generally printed prior to the product of the vehicles.
Both engines had these carburetors discontinued, and different carbs replaced them mid-production year.
The 40/50 7-42 was replaced by 7-46, and the 7-43 was replaced with 7-47. This took place 25 March 1941.
The large engine 7-39 was replaced by 7-44 an the 7-41 was replaced with 7-45. The large engine replacement was 24 March 1941.
7-46 was held over for a part of 1942, but then replaced.
The Carters also had early and late production.
Jon
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Wiith the progressive linkage, the engine got a reputation for horrible fuel economy; and then fuel rationing entered the picture. The fuel distribution in the various cylinders is not ideal. This is the idea behind using straight linkage.
On a similar note, I used to regularly rebuild Chevy 6 cylinder carbs that came in with the accelerator pump disconnected. If you only can acquire so much fuel per month (and not very much), you tend to try to save what fuel you can.
Jon
From "GM Folks Magazine" June 1940, Vol 3, Issue 6.
Rochester 4GC accelerator pump ball check is stuck (55 Packard 400)
in Technical
Posted
No problem, glad you able to get the measurements.
Any time there is seemingly an issue with one of our kits, we want to know. We may not agree
but if we made a mistake in filling a kit, we wish to fix it.
Just for the record, the "issues" for we get the most correspondence are the Rochester throttle body gaskets with the cut-outs. These cause so much confusion, we ended up posting the documentation from Rochester on our website.
Jon