Hey everyone, I just got done doing a lot of thread searching here on the forums and got a mixed bag of results. I have a 1.12 4100 carburetor and was wondering how bad of an experience I would have putting it on my stock, worn out, original 292 engine. It's got an original 2 speed automatic trans as well. The car is currently equipped with a 1.02 2100 carb and runs like a dream. I only want to try the 4100 for giggles. Would the car be undrivable? I hear people say that it would work, just not well. I'd be expecting flat spots in the acceleration and horrible gas mileage. Is that safe to assume? Or would I not even make it out of the driveway? Just curious. Thanks

While the general consensus is that it probably won't work well, something I've learned is you just can't absolutely know something until you try it.  Since you have it, try it.



Lawrenceville, GA

I would go with why fix what isn't broken. When you start doing things like that, you'll also end up up doing a bunch of MAWs (might as well).
You really don't want to run a 1.12 jetted carb on an economy rated 292. Even a 1.08 would be pushing it. Your engine doesn't have the "lungs" to breath in all that extra fuel.


~DJ~ AKA "Bleach"
1956 Ford Fairlane Town Sedan 30K original miles

Thank you for the confidence!

56_Fairlane (10/6/2014)

---

I would go with why fix what isn't broken. When you start doing things like that, you'll also end up up doing a bunch of MAWs (might as well).
You really don't want to run a 1.12 jetted carb on an economy rated 292. Even a 1.08 would be pushing it. Your engine doesn't have the "lungs" to breath in all that extra fuel.

I hear that. Is there any way to "tune down" this carb to make it work better for a smaller egine?

The 1.12 carbs do vary between some of the applications.  One off of a 352 would be metered differently than one from a 428. While they should all crank and run on a 292, the ones from the smaller cubed engines will perform with less drivability issues.  A slightly larger pump shot may be all that’s needed to restore any drivability issues.

I use 750 cfm carbs on Y’s regularly and they work well.  A recent +070 over 292 I rebuilt for a ’56 Victoria is using a 750 Summit carb and runs flawless with simply a richer jetting change on the secondary side.  The primary jets are the same as delivered.

Here’s the link to an article published in the Y-Block Magazine that covered dyno testing of various carbs on an iron 4V intake.  It’s not necessarily about the size of the carb but instead how that particular carb is metered.
http://www.eatonbalancing.com/blog/2012/09/25/four-barrel-carburetor-testing-on-the-y/ 

Lorena, Texas (South of Waco)

For the record, mine is a 5752309 1.12 with the carb tag indicating:
Series: EFA
Type: 9BC
Year: N

Looks like the carb is from a 58-60 352.
It should be a 600 cfm carb. It should work OK if you follow Ted's suggestions.


~DJ~ AKA "Bleach"
1956 Ford Fairlane Town Sedan 30K original miles

I'm running one in my 292, replacing a 1.08. The engine is not stock, it has a Isky E-4 cam, and is bored 0,040 over.
My carburetor was originally from a 1965 Galaxie with a 352. It works perfect, and the car runs like a dream.
I'm using 48F jets on the primary side and 55F on the secondary side.
The other day a gave a friend a ride, and he was really impressed with how well the car runs. He said he could swear it's fuel injected. No flat spots, no hesitation, starts with ease, and the secondaries kick in very smoothly.  For me, the 4100 is the very best four barrel carburetor ever made. 
I think it will work great, as your stock engine has more vacuum than mine due to the cam. 
I would suggest using a "B" intake manifold tough, as i'm not very found of adapters.



Túlio Lazzaroni "FORD", Florianópolis SC Brasil.

'74 Ford Galaxie 500 292 V8

'82 Ford Galaxie Landau 302 V8

'98 Chevrolet S10 4.3 V6

'01 Ford Focus 1.8 Zetec

Túlio Lazzaroni "FORD", Florianópolis SC Brasil.

'74 Ford Galaxie 500 292 V8

'82 Ford Galaxie Landau 302 V8

'98 Chevrolet S10 4.3 V6

'01 Ford Focus 1.8 Zetec

I have run some on 292's and they did Fine. As Ted says tune it to qour engine and there should be no problem with drivability. They can also be more economical than the 2 barrel since the primarys are jetted smaller but opening the 4's a lot will make it less economical and its hard not to test them out excessively!

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?