Technical What is This Carb & is It Worth a Sh*t if Rebuilt?

Took this off a '53 Flathead with an Eddy 452 intake with a square bore base. What is it? Autolite? Worth running if rebuilt? Thanks!

 

Some of those Autolites are getting to be worth a few dollars. I see it doesn't have a tag, but there should be some numbers stamped right near the drivers side front bolt. Something like C9AF B. You should be able to Google what it's from. Gene.

 

Just like you said, front drivers side bolt, clean, brush & clean again! C2SF A

 

They are good carburetors. Your engine could actually run with entire top off. This style were very common on the early 4 barrel Mustangs and Fords in the early 60’s. I would have it professionally rebuilt as all the original parts appear to be there. The second photo shows where the cable attaches for a choke so I’m guessing it came off a truck. I believe they were in the 400-500 cfm range.
The linkage makes it work on a flathead engine and would probably work with other 4 barrels.

 

Could be one of summits ( or other) holley clone ..

 

Who are the go to guys for a carburetor kits now a days?

 

Not a clone, that is a 4100 Autolite that was originally on a ‘62 Ford.
These carburetors came in 2 different sizes, The 1.08 flows around 440 CFM, vs. 590 for the 1.12.
A 108 should run pretty good on your Flathead.
These are very easy to rebuild.

 

Check with @carbking for quality and if he has what you need.

 

^^^^^^^^^^^^ He's kinda cranky, but OK!^^^^^^^^^^^^^^

 

60's Ford 352 v8 or a 390

 

Hmnn, I sent him a PM (never followed through) about a kit, I didn’t get that impression from his reply to me.

 

It’s easy to rebuild.

 

"Grumpy" is a better description And it has been "Monday" ALL DAY!

PM sent.

Jon

 

Great carb. I like them. Yours is older. It has the ball-check in the accelerator pump, rather than the later rubber valve. Might have brass throttle plates and shafts (usually the secondaries). It appears to be manual choke too. Factory manual choke is worth more than a converted auto. Yours looks to have factory hardware and provisions for an auto choke. Hard to say, I'd venture converted. Walker has kits and parts. I have some organ donors. The late 50's 4100's came on a bunch of stuff (Edsels etc.). It's a keeper. Looks a mite rusty though. Mike

 

Someone must have added the manual choke parts to it. C2SF is 1962 Thunderbird

 

They came in 2 sizes, one for 289 and another for the 352-390 engines. Great carburetor, better fuel mileage than a Holley. This one came off a 1965 -289-225hp.

 

He makes up kits….no longer overhauls carbs

 

The early ones had Holley type main jets, I'm not sure if 1962 is old enough.
Later ones use the bigger Ford jets (5/16-32 threads IIRC).
The vast majority are 1.08 or 1.12 venturi size, the other two sizes are unlikely to be encountered.

 

I’ve had them on a couple of cars over the years, two T-birds, and a ‘53 F100 with a 390 in it. They are not a maximum performance carburetor but they are easy to rebuild and virtually trouble free. I’d keep it and run it if you have an engine that it is sized right for.

 

I tried a 1.12 venturi one on my 260, it was too big and the car was slower off the line (low to mid range rpm) than with the original 2V.
So I replaced it with a 370cfm (sic) Holley four barrel which worked great.

But I do like the Autolite 4100s, and finally got a 1.08 version.
Those were used on most of the few small blocks that came with 4V carbs plus a small number of bigger engines. But way more big blocks came with 4V carbs (usually the 1.12 version) so those carbs are more common and cheaper.

 

In the core pile that I pick from, 1.06's and 1.19's are hen's teeth. 1.12's outnumber 1.08's 4 to 1. Most are off of old, big engines. People pluck the manual choke parts off of 2100's all of the time. More than 1/2 of the manuals I see are converts. I turn them back to auto. It's harder to sell a modified carb. Older carbs also had metal arms on the secondary diaphragm. These get picked too. New plastic arms are available. The metal in the older carbs is better, especially compared to a later 2150 or 4300. I get later carbs more corroded all of the time. The Zamac turns dark and gets pitted. I have junk 2150 bodies with holes eaten through them. Also, I like the older ball-check accelerator pump. It will never "harden up". Most of what I get are from junk cars, the pile gets added to constantly. Often pretty rough. If I see a fair 4100, I try to get to it before it gets too much "hangar rash". If there is an 1100/2100/2150/4100/4300 that someone is after, I can keep an eye out. I'm not the seller, just the rebuilder. I can put you in touch with the powers that be. An old 4100 gets my vote as the most bullet-proof 4 barrel carb out there. Mike

 

It was a joke, he has always been very helpful with my "problems"! Wealth of info!

 

I am getting 1.56 under the*****erfly's, off the charts for a 4100...........................measuring in the wrong place? Interesting local find. Dizzy looks to be a converted SBC, welded Aluminum anchor lock down tab, chevy guts?

 

The venturi size is on the right side of the primary bowl. In a circle. Mike
Edit: I have a 1.12 here and it is ~1.56" too.
Edit Edit

 

Same here, thanks! 600 CFM, hope they have hopped up this little unknown flatty to handle it!

 

I think the confusion might be venturi diam vs throttle blade diam. The 1.12 or 1.08 is venturi diam which would be a lot harder to measure than throttle blades.

 

I’m running the Summit copy on a couple of engines. Really like them. No gaskets below the fuel level. I looked for an original Autolite, but by the time I bought a kit and built one the Summit was cheaper.

 

By "square bore" you are reffering ro the AFB/Early Holley pattern, not "square" (which is early WCFB, early 4G's and a few others), aren't you? I have a four flathead 4-BBL manifols (a Fenton, an Offenhauser, an Edmunds, and a Sharp) as well as an old Offenhauser dual quad for an Olds Rocket that all have the old "square" bolt pattern. The carbs I know that fit are hard to find and expensive when you do. I have never had a 4-BBL manifold for a flathead made by Edelbrock. Does the Edelbrock have the "square bore" pattern, or does it have an adapter? I sure would like to find another type of "square" carbs if it exists.

I think a better description of the bolt pattern would be helpful. Maybe "Old Square"?

 

From Eddy's add;
"Edelbrock 4-Barrel Intake Manifold for 1949 to 1953 Ford/Mercury Flathead V8 will allow the use of commonly available Square-Bore (4150-Style) Carbs such as our Performer or AVS Series on the Late Ford Flathead Engine." There is an adapter but it comes with the manifold, will know tomorrow after I take adapter off to see what pattern the manifold is without it.