Know Your Ford Carburetor
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- Опубліковано 15 вер 2024
- Ford Carburetor ID
Episode 123 Manic Mechanic
Autolite 2100 ID 1960-1974
All information is listed in the description below.
1. What sizes? There were 8 different venture sizes for the 2 barrel 2100.
.98 @190 cfm
1.01 @245 cfm
1.02 @ 240 cfm
1.08 @287 cfm
1.14 @ 300 cfm
1.21 @ 351 cfm
1.23 @ 356 cfm
1.33 @ 424 cfm
Autolite 4100
1.08 @ 480 cfm
1.12 @ 600 cfm
1.19 @ 669 cfm
2. In order to know what size venturi you have look on the drivers side of the float bowl. There will be a set of numbers that corispond to the venturi size we just talked abut. Thus yu can know what the cfm of the carburetor is.
Tech tip: CFM stands for cubic feet per minute and lets you now how muchg air and fuel will pass the veturis when the car is running.
3. The carb tag ia and was the most detailed part of the carburetor info. If it has the carburetor tag it will list the Decade, year, model of car, and group (Carburetors are Group F) the leter after that denotes what the use was, typically it was for manual or automatic. Below that on the tag is the change level then the date year is first, followed by month (There is no I in the date coding system as it could be confussed with a 1 then day.
IF the tag is missing the carburetor info is on the drivers side front foot of the carb. But it will lack the date code.
4. In stock configureation, at 4,000 rpm at 90 percent volmetric efficency, the Autolite 1.14 venturi carburetor will perform very well. But it won’t get the kind of miulage that a 4100 autolite can. Simply put, a 4V carburetor will get better gas mileage if you don’t dploy the secondaries because the primaries are smaller. The chart I am showing is available on our website at the url below.
289-302 go with 1.08 primary. (this in the 4100 is 480 cfm) and will net you better milage.
Our 260 has a 240 primary.
5. The Autolite 4100 has some sticky points.
• No PCV port on the carb. The only port is on the spacer.
• Many aftermarket intakes will not support the 4100 spacer due to the base plate confifureaton.
• Thre manual shift 1.08 carbs are expensive since they are for the HiPo 289 typically.
• The 1.19 venturi is ultra rare and was only used on the 383 “high torque Mercury engine in 1958.
Issues on both the 4100 and 2100
• Jets on both carburetors are usually specific Ford jets but can be obtained from places like Mikes Carburetor. Early carburetors up intol 1966 ish used a jet the same size as Holley.
• Power valves are common to Holley but some caps can interfier with the power valve.
• The throttle shafts can be worn and might exibit issues will weird idle charicteristics.
www.autokrafte...
Carburetor Spacer Kit: C3OZ-9A589C
www.fordificat...
Good details in the video. Most people throw their old auto lite on a shelf for a Holley. Other than the issue with stumble in hard corner I prefer them for a daily driven vehicle. The annular boosters on the autolite are great at atomizing fuel and result in a very snappy throttle response. The autolite boosters are far superior to any stock holley booster. A few more details some people don’t know. The accelerator pump and power valve are Holley parts even after they switched to Ford jets. The Venturi size is only half the story. The boosters also sized differently. They are stamped with a letter code. Ford used different sized boosters and jet combinations to dial in a carb for the vehicle and engine it was built for. I haven’t found a good source for decoding the boosters.
I am one of the lucky ones that have a 4100 for a manual shift mustang. It’s going to look nice on my engine once I swap it over to the top loader laying in the corner of my shop.
All true. We covered a good bit the the info on the boosters and power valves in the Rebuild on the 2100.
I’m running a 2100 on my Torino right now but was looking at upgrading my setup to a 4100 so this video was perfect for me. I really appreciate it.
Glad I could help!
Also yes, stuff like this is priceless. It's hard to find info often and for younger guys that are getting into old cars, it gets tougher every year.
This is great info keep it coming! Thanks!
We'll do more.
Nothing like knowing your carb and Jeff is the one that can bring it to you....
Thanks Paul!
Great clip. A lot of useful info, thanks a bunch!
You are welcome!
After years of watching UA-cam, I just found your channel. I am a Ford fanatic!! I've got an 80 Mustang Coupe with a 351w swap. I just subscribed and I'm about to binge watch your videos All......Day......Long!!! I'd love to see a video on the 4300, I had no idea they even existed...
There will probably be more too!
I installed one on my 84 Mustang GT. Better mileage but cut power. I have witnessed Holly's burn cars pretty often. God bless
Great info. I went and looked at the 2100 from a 352 that is now a 445 and there's no tag. All the info, including the date code is stamped on the foot(1965).
I think '66 is the start of the no century info on the foot.
Thanks for the info! I would love a video on how to tune one of these carbs!!
Noted!
They made a hipo 289 for a auto it was a 64 mercury comet 289 225 horse c-4 auto. It had 1.12" plus a auto choke.
You are correct! Though the 225 horse lacked the solid lifters of the 271.
C3AF AU 1.12 Venturi sitting on the shelf. Love the channel!
Nice! Thanks for the kind words!
I have one of the 4 barrels I bought at a garage sale for $20. I will be checking it to see which one it is now. Thanks!
Maybe a 1.19...I'll give you $21 plus shipping.
Thankyou man I really love your videos and needed a video just like this god bless
You are welcome!
My 69 Galaxie had a 1.33 Venturi 2V it was the premium fuel IP. It was really great!
Nice!
I have one of those, was on my ‘69 galaxie convertible 390 fe. Had the motor redone and managed to find a ‘69 cobra jet Holley 735 cfm.
Nice!
Thanks Jeff, another great video!
Thank you!
I took the 4V 4100 off of my 65 352 with the 1.12 Venturi and it was perfect for the 289 hi po clone from a 302 we biuilt with the Voodoo cam and a C4 for my father in laws 65 Fastback. and hipo manifolds and it was fantastic!
Yes. with more flow the 1.12 is good.
Remember the industry standard for carbs---
2V CFM is determined at 3" Hg pressure drop on the flow rig.
4V CFM at 1.5" Hg.
Got it!
Awesome video! I'd love to see a video focusing on the Ford/Motocraft 2100/2150 - weak points of them, what to watch out for when rebuilding, et cetera.
I have a 4100 on a '65 Galaxie 500 with a 352. I have gotten 22 mpg on the hwy
Yup. It is possible.
Parents 66 Galaxie XL 352 4V (250 HP) -- 18 MPG highway. Back in the day, with air con.
I have a 1963 4100 with 1.18 jets. The code for the carb is C3AF. It's on a 390 CI w/Cruise-o-matic transmission. And yes it can be finicky! :)
Yup.
Very informative video! Without some of the minutia, some things are just mysterious.
Mysteries wrapped in conundrums...
The 8mpg made me laugh pretty hard. Aint it the truth. I still will pay for 91 many times a week over for the feel of it versus an economobile.
Us too. Some days I almost get misty over 28 mpg....then I realize it is just the burrito I had for lunch.
Very much like this type of video
I'm not sure if the Holley 4160 side hung floats or the Autolite 4100 came out first. Some of their features reflect each other. But, the 4100 had annular discharge booster venturies. The Holley did not. The fuel and air was atomized better with the 4100's venturies.
Great information, thank you!
Glad it was helpful!
Thanks great information !
You are welcome
good info. would like to see one on the 4300
Ya'll gone make me do it....
Yeah but...while I did learn about the carb on my 66 Merc S-55, you sorta forgot the rest of the story with the carb tag? What do the 4 smaller number below your example (A 3JB) mean, ie C6 BA on my carb tag fer instance. Ain't too old to learn.
Yes, I do enjoy the minutia related to some parts.
Me too!
These are fantastic Carbs. Definitely familiar with the hard corner stumbles (very noticably right turns...lol) I think if they had a more open aftermarket support they would be a real contender. A lot of people just don't know where to get parts or tuning pieces and that drives them away. The Summit 4bbl carb very closely mimmicks a 4100 with more Holley design and parts.(was originally a Holley product to begin with) I hear good things about them.
They just lack that annular discharge nozzle and rely on the Holley style which is a bit more sloppy.
We used to replace them because the plastic rod that closes the secondaries would break off and it would hang wide open. You had to turn off the engine to get it to close. We were afraid to get on them for a race. I didn't know about the rod for years, till I had one that wasn't broken off. Now I always check that the rod is there and if iits missing I replace it with a screw that's the same diameter. I think that a new rod should come in the rebuild kit. I've always had good performance out of these carbs.
Good info, thank you !
You are quite welcome
Well, this may have answered some of my questions for my build then. I ordered a rebuildable 4350 core on ebay because I knew rebuilding my 78 F-250 460 was gonna cost me some coin already. Turns out the core I bought was for Jeep. The tag is 6T4A4. Which, of course does not entirely translate well into Ford lingo since it's not technically a Ford p/n. So, besides the jetting etc not being correct, nor did it have C6 kickdown provisions, but possibly the venturi dia might be incorrect.
So, I should probably stop wasting any more energy on this thing. Yes, I was aiming for OEM performance, but at the going rate for reman units, I'm probably just gonna cave in and go aftermarket.
The truck is non-emissions somehow(though signs of converters exist?), so at least that part will be easy. I believe it may have been custom ordered for agriculture. Though, the lack of 4WD, calls that theory into question.
It's a strange beast. It came equipped with Duraspark 1(I believe, since it has the smaller cap), no vapor or fuel return system, no EGR, BUT it came with factory A/C, 2 tanks, rear window defrost, AM radio, and the "Trailer Special" package. All on the, "Custom" trim package.
Sometime before taking ownership in 1996 and before the previous owner had it the year before, someone hacked the exhaust and made it dual side exit. Then they reupholstered the seat and removed the door panels and installed some fabricated ones.
Someone also installed a massive hitch that measured the width of the frame but extended from the bumper all the way forward to about 3" from the diff. Basically this thing is a big as the rear tank.
Lastly, full-length Hellwig helper springs were added.
So, this thing was built to tow.
And we abused that privilege too. We carried a 2,250lb cabover camper and towed a 23' camping trailer using a 3' extension tube from the hitch. The camper extended past the bumper 2'. So that hitch not only carried that weight, but handled the torsion as well. A normal hitch wouldn't have worked.
Anyways. I've owned it since 1996, it's my first vehicle, and I hope to pass it on to my son someday.
Good video . Good info. .
Where would we finde the codes for the stamp on the base? I have one stamped 64 A (really it looks like 64AA, I'm guessing the A was struck twice by accident. Thank you! It is a motorcraft 2150 carb.
I had a spread bore on my 351 Cleveland 4V , can't remember much about it
Motorcraft 4300D im guessing
Boss is right, 4300D. Clevelands run way better on that mixed bore set up in my opinion.
Great video. I've got a 4100. Have to check whether it's for a manual or automatic. I never knew this. Thanx
Glad to help
would love to know more about the 4300
Me too! LOL
Thanks for the decoding info! I recently put an Edelbrock on my '72 F100's 360, replacing the 2100 (changed the intake too, obviously). The tag on the 2100 was D4PE, so I knew it was a '74 carb, but I never cared enough to investigate the PE. You inspired me to Google it. It was a 1974 Replacement Part Autolite. Would the original owner have needed to replace the original carb after two years? Or do you think he may have bought it several years later rebuilt and it happened to be a '74 replacement?
Shady mechanics used to throw parts at stuff just like they do today. Bot scenarios are possible.
No worries Jeff, you still done good
I try.
It's a pain trying to find a 2150 with an AOD TV Rod linkage for a 1983 LTD Country Squire with a 302 CFI setup. The infamous 2700vv is shaping up to be my only accessible alternative. TV cable kits on non-aftermarket carbs seem non-existent as well
Contact Jay Broader Transmissions for all of your Ford transmission advice, parts, even custom builds, and adapters. A friend of mine mine had a 1964 Galaxie with a 427 SOHC with stack injection that made in the neighborhood of 1500 hp and ran Drag Week with it one year with a Powerglide, and a C4 and the OD all of the other cars like Larry Larson and such ran and the name escapes me but it is a really strong OD. Jay Broader can fix you up! I got some things for my C6. It shifts perfectly at 6400 in Drive.
Hope you get it worked out.
That looks like the 2150 motorcraft thats on my 78 bronco with a 302
They are different. There are some internal things on the 2150 that are unlike the 2100.
Interesting the baseplate and body are one cast piece.
Yep.
Mine is a c 8016A.it was given to me and I put it on my 68 fairlane 289.
C8OA?
@@AutoRestoMod yes I guess .I just wrote the #s down as I seen them.
I got a 4100 1.12 came off a 65 Galaxy. I'm going to give it a whirl on the 460 I built until I buy a sniper for some extra mpg...
What is funny is Ford ran the 1.08 on the 1966 428s in the full sized cars... Be interested in seeing what you think.
I have a autolite 2100, if you take the hose off the vacuum on distributor should the rpm change? Mine does not. Is there something wrong.
That was handy!
Well thanks!
I have been looking for a source for replacement throttle shafts for some time for the 2100 and 4100. I have three carbs all with worn shafts (carb bodies are not worn - throttle shafts are). Anyone know a source? I have called or emailed probably a dozen carb parts suppliers without finding anyone making / or selling replacements.
The shafts are going to be an issue.
Yes I am thinking of having a machinist make a couple and swap the end with the linkage. @@AutoRestoMod
Would like to see some info on the 4300D
Me too. Looking for someone that knows how to make those sing. So far, I ain't the guy. LOL
Had one done years ago by Ponycarbs and need another one doing. Unfortunately John is no longer with us and I never knew what changes he made anyway.
If there are so many 2100s out there, can someone please tell me where I can get a choke rebuild kit or even a second hand choke. Mine is gutted and I am in Australia where it is uncommon to come across this carby. Thanks!
www.carburetor-parts.com
Hope that helps
@@TheFARM2019 thanks man
Mikes also has a conversion to electric choke as well.
@@AutoRestoMod I’m considering manual too. To be fair right now is as cold as it gets and she still starts without a choke. So the question is - should I bother?
Almost bought a 4100 last month
Annoyances aside, I likeum!
So how about the decoding of the lower numbers on the carb tag that you were gong to talk about?
Those are just date codes. I am sorry I missed those, check the Fordification site for the break down.
I want to know about the 4300 speaking as a person who has a 71 Continental Mark III
We're researching trying to find "the guy" to chat with about those carbs.
What do you do if you flooded it doing a fast u turn
I have a 1981 302 Thurber bird
What EA mean please
What can I put on a 71 Thunderbird 4 barrel
I would do a 650 Holley vacuum secondary.
What about the 2150?
Are somewhat different, have a vacuum operated enrichment valve that operates metering rods. More trouble prone than the 2100.
Tom is right. And I haven't done much with those.
The one I have is an C5 AF carb with C5DD under it. CFM?
Look for the venturi size on the casting.
Mason is correct. The C5AF is a 1965 Full sized carb. I think the venturi size is 1.12 so 600 CFM. Good workman carb on a 390 or 352
So would a carburetor from a 289 302 or 351 fit on a 390 FE
Yes. And 60 CFM should do the trick on most applications.
@@AutoRestoMod ok thanks
Tossed the ford carb a week after I bought my Mustang and installed a Carter AFB.
That is an option!
So what you're saying is your buddy GUESSES the 4bbl gets better mileage...tell your buddy to keep his thoughts to himself. useless!
Nope, the four barrel will get better mileage than the 2V, Just don't get into the secondaries.