I'm running three 94 carbs on my Y block in the Model A but one carb is a mis-match. All three are marked 8BA in a circle on the driver's side but on the other side two have FORD script cast into the fuel bowel area and one has "FOMOCO" in an oval. Is there any difference in these different bodys? If so, is one better than the other, is one better than the other for the primary or secondary position, I'm running progressive linkage. Also, I have noticed that some of the 94 accelerator nozzles are different, best I can describe is that some look like they shoot straight out and some angle down. Is one better than the other here also?
Boy you’ve opened up a rabbit hole. instead of going over this, read this post responded by some of the best informants. https://www.jalopyjournal.com/forum/threads/wanted-holley-94-schooling-101.129864/
IIRC there are 17-19 variations of model 94 carburetors. some Ford script, some Holley, some Fomoco. These are just the obvious differences. There are many mechanical differences, too.
In the FWIW category: Listed in the 1955 printing of the Holley Master Parts Manual for Ford (I didn't look at Lincoln or Mercury): 1BA-A 7RT-A 8BA-A 8RT-A, E, F, G, H 59A-A 922A-A EAB-C, D, E, F EBU-B, D, E, F, G EBV-H, J, K, L Also the comment: earlier models are not listed in this catelogue. I know without looking there are also 21-29, and 91-99, maybe a 78? So there are 23 different models listed above not counting the earlier models. The 1955 HMPM has individual part number breakdowns on all of the above. These are all listed as models AA-1 or 2100-DD (both commonly referred to as "94's" by members of these forums). So just to be clear: there are at least 5 different models that will be marked "EBU" on the side. Carters and Strombergs are easier! Jon
Thanks for the info guys. I understand there are many 94's other than the 8BA model but I have two different 8BA's one with the FORD script on the side and another one with "FoMoCo" in an oval on the side. Both are marked 8BA on the other side in a circle one smaller than the other, I'm guessing they are the same inside, anyone know for sure? Also in my collection of 94's, I have seen two different accelerator outlet spray nozzles, one looks like it shoots straight out the other shoots down, is one better than the other? Or just different? I read the thread linked to by Petejoe, thanks, lots of info but it did not address any differences in the two 8BA's I have or the accelerator nozzles.
guess I should get into what I'm doing here. My Model A runs a 292 Y block with three 94's unfortunately sitting on top of the poor performing Offenhauser manifold. Anyway out of the three carbs, (all 8BA 94's) I have one is different, says FoMoCo on the side, others have the FORD script. So I was wondering if there is a difference in these and if so, should I run the odd ball as the primary? I have a very slight stumble on acceleration just as the secondaries open. Seems that I need a little more shot from the pump and I was wondering if there is a difference in the two accelerator nozzles, if so, I could try changing them if I could find two of the better ones.... that is if one style is better than the other.
Just using carb logic gleaned over many years and different cars I'd have to think secondaries shooting down is preferable. Shooting across, or straight out, might "aerosol" the fuel better while entering the airstream which might aid driveability and cruise efficiency. This is all seat-of-the-pants thinking. Could be an interesting convo from someone with carb flow bench experience (yes there is such a thing).
Check your fuel pressure. 2 to 1-1/2 lbs at idle is good. No more. Install a temporary gauge and take it out on the road and see if it drops during acceleration. I’d put the one that’s stamped differently and install it in the middle of the intake. I sure hope you aren’t running the stock distributor. Loadamatics are junk. They especially don’t play well with a multiple carb intake.
YES, someone on here did swap the nozzles and may have fixed his problem, don't remember and can't find that thread... was a year or so ago.
I'm at 2.5 psi and it is not the loadamatic. It's a 1959 dist. I am running the advance line from the back side of the center carb. In the thread you linked to I think Bruce was saying not to use that port but he may have been talking about when using a loadamatic? not sure. So if I don't use that port, what do I use for vac advance? manifold? Guess we are getting away from what the first question was ( the differences if any) but I'll take any info I can.
Your advance could very well be the cause of hesitation. I’m not a y block man but it appears the later 59 distributors were changed from a Venturi advance to a manifold advance according to these posts. https://www.jalopyjournal.com/forum/threads/vacuum-advance-for-292-y-block-where-to-plumb.1046366/ https://www.fordbarn.com/forum/showthread.php?t=139860&showall=1
The Jalopy Journal
