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By charliemccraney - 14 Years Ago
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I have two 2100s, one I was told came off of a Y, and another I took off of a Y. I want to know if they are actually for Y Blocks.
1, Tag #s DBA 1BA Q, Engineering # C1AE-Z
2, Tag #s KBA 1BA P, Engineering # C1AE-AB
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By 46yblock - 14 Years Ago
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If they are both 1.02 venturi, which they probably are, they are both basically the same carb made for Ford car, with suffixes indicating relative date of production for 1961. 1.02's were used in 292s. Even if they were for an early 332, they will work in a 292 just fine.
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By charliemccraney - 14 Years Ago
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They both have 1.02 cast into them so that must be what they are.
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By buddy - 14 Years Ago
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I know where two or three of these carburetors are in a local salvage yard and of course they would need to be rebuilt. Does anyone know what they would be worth? I can probably get them for ten dollars apiece.
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By PF Arcand - 14 Years Ago
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Buddy; You could try looking up "Pony Carburetors" (if they are still in business?) They used to list core prices for Autolite carbs.
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By buddy - 14 Years Ago
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Thanks Paul, I took your advice and found out Pony charges $120 to $200 for the different 2100 carburetor cores. I think I might buy these 2100 carburetors I found at the salvage yard so I'll have them if I ever need one. I recently bought a 4100 carburetor for $10 from the same place and after I rebuilt it she looks very nice. Now I hope it will run  I know some may prefer Holley's and I won't argue the performance differences but these series Autolite carburetors are the simplest and easiest carburetors to rebuild and very seldom ever give any problem in my experience.
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By mctim64 - 14 Years Ago
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I think the 4100 Autolite is superior to the Holley in many ways but you can only get them up to 680 cfm (those are hard to find) 600s are more available. Very good carb.!!
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By mctim64 - 14 Years Ago
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I feel the same about the 2100s, forgot to add.
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By buddy - 14 Years Ago
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Tim, From what I've read, my 312 bored to a 322 c.i.d. with an Isky E 4 cam doesn't need more than about 550 cfm for best overall performance. The Autolite 4100 I have is a 1.12 venturi (600 cfm) from 1959 Thunderbird 352. I hear it will likely have better upper RPM performance than lower RPM. Have you had any experiences using a 600 CFM on a 312 or 322 and if so how did it perform?
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By 46yblock - 14 Years Ago
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buddy (10/19/2011)
Tim, From what I've read, my 312 bored to a 322 c.i.d. with an Isky E 4 cam doesn't need more than about 550 cfm for best overall performance. The Autolite 4100 I have is a 1.12 venturi (600 cfm) from 1959 Thunderbird 352. I hear it will likely have better upper RPM performance than lower RPM. Have you had any experiences using a 600 CFM on a 312 or 322 and if so how did it perform? I am working on the same combo, 322/312 with similar cam to E4. Some people say the larger 4100 wont work well, others the opposite. It should work. I ran a 1.14 venturi 2100 on my 292 for a year, and it worked great. The 4100 venturi's are smaller at 1.12, so unless the secondaries are too far open in low speed and cruise conditions, the 1.12 should work just as well on the primary side. Secondaries are vacuum operated so I cant see problems there either. Jetting may need some slight adjustment. Stock is around 48/56 or 57. Anyway I am anxious to try it out, along with a couple other Holleys, models 4010 and 4011. Last year and part of this a 1.08 venturi 2100 was in use on my 292. Worked great. Changed to a 1.08 4100. The 4V has produced identical performance characteristics at low speed, idle and cruise, as the 2V did.
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By buddy - 14 Years Ago
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Thanks for the carburetor info Mike.
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By 46yblock - 14 Years Ago
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Buddy, you are likely going to get a chance to try it out before me, so make sure to give us some feedback  .
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By PF Arcand - 14 Years Ago
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I have a 1.08-4100 I hope to install in the near future. However just for info, according to our moderator Ted, in an article in YBM, issue #97, Mar.-April 2010, an independant test of Autolites showed them to flow somewhat less than originally thought. The 1.08s apparently flow about 440 cfm & the 1.12s about 520 cfm. However, in Ted's extensive testing of 16 carbs, (some stock, others modified) in the same issue, on his well known test mule, a 1.08 finished 5th & a 1,12 finished 8th.
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By 46yblock - 14 Years Ago
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Good info Paul. I see where Buddy is considering a '59 4100. The early booster designs of 2100 and 4100 seem to have been significantly improved over a few years. I am working on a 1958 Ford/Edsel 2100 for 292, and it has a booster with quite a few antique features compared to those just a few years later. A 1964-1966 4V carb for 352 may be a better bet for satisfactory performance.
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By mctim64 - 14 Years Ago
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buddy (10/19/2011)
Tim, From what I've read, my 312 bored to a 322 c.i.d. with an Isky E 4 cam doesn't need more than about 550 cfm for best overall performance. The Autolite 4100 I have is a 1.12 venturi (600 cfm) from 1959 Thunderbird 352. I hear it will likely have better upper RPM performance than lower RPM. Have you had any experiences using a 600 CFM on a 312 or 322 and if so how did it perform? I had a 4100 on the 390 in my Fairlane back in the '80s and it ran strong all the way to 6500. I did not check the venturi size back then and the car is long gone. It might of been a 1.19 but I think it more likely the 1.12. I switched it over to a 406 3x2 set up that I bought at the local speed shop (used for $150 with linkage and air cleaner) it looked cool but I think the single 4100 ran stronger, it certainly didn't hesitate when you "stomped" on it.
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By charliemccraney - 14 Years Ago
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PF Arcand (10/20/2011)
a 1.08 finished 5th & a 1,12 finished 8th.
And if you consider only unmodified carbs in that test, carbs that you and I are more likely to use, they placed even better.
Are there any good resources on the net for identifying these? I'd still like to know what the specific application is if the info is around.
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By 46yblock - 14 Years Ago
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Here is a good one: http://mustangtek.com/4100/ford4100.html
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By Doug T - 14 Years Ago
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I found this guy's web site to be very helpful. If you have the tag still on the carb you can identify what engine and car it came on. http://www.carbkitsource.com/ I also bought a kit from him which was fully satisfactory for the 1.12 4100 I put on my truck. The engine it came from was a Merc 352 FE. The Truck was a 301 cid motor and it ran fine with the 1.12 venturis. There was a slight hesitation when stepping on the gas which I attributed to a very slight amount of lost motion in the link to the accl. pump.
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By buddy - 14 Years Ago
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I robbed my 4100 carburetor off a 1958 or 59 salvage Thunderbird which appeared to have a 352 engine. Everything I've read says 4100's are identified on the right front side of the fuel bowl with a 1.08 or 1.12 stamped on it but mine has the letters EDC and underneath that is 7AV D My question is, is this a 1.12 venturi and I wonder if it was the original carburetor on the Thunderbird.
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By 46yblock - 14 Years Ago
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buddy (10/20/2011)
I robbed my 4100 carburetor off a 1958 or 59 salvage Thunderbird which appeared to have a 352 engine. Everything I've read says 4100's are identified on the right front side of the fuel bowl with a 1.08 or 1.12 stamped on it but mine has the letters EDC and underneath that is 7AV D My question is, is this a 1.12 venturi and I wonder if it was the original carburetor on the Thunderbird. The number 7AV D isnt much help. The pre 1960 2100s/4100s didnt have tags. Location of the ID number stamp was also different, most often on the side of the float bowl. The edsel carb I mentioned didnt have a traditional ID #, ex. C2TE A. It's number is 5752307. An easy to spot difference on the early Edsel unit was a spring loaded "trap door" mounted in the choke blade. It sounds like you very well may have the original. As for venturi size, 1.12 almost guaranteed. I noticed on the site mentioned above the same trap door is in the rare 1958 1.19 venturi choke. So you may find the same. What was the condition of the T-bird? And Buddy, your mailbox is full.
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By buddy - 14 Years Ago
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The 58 Thunderbird was not wrecked but it must have been setting in the salvage yard for 20 years. The lower quarters were rusted out along with the floorboards and the inside really trashed but it is a complete car....well except for the carburetor. My carburetor also has the spring loaded trap door in the choke plate so I'm also thinking it's an original 1.12 verturi carburetor. I emptied my mail box, thanks for letting me know.
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