Carburetor jetting help

Carburetor jetting help

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By Kahuna - 15 Years Ago

Happy New Year everyone. Here's my question: Can anyone tell me the stock carb jetting for a 56 Ford Holley teapot carb (OR), perhaps tell me where I might find that information. Basically, I need the primary jetting. secondary jetting and the power valve number. I can get the carb list number if that's necessary?

Thanks

Jim

By oldcarmark - 15 Years Ago

If you want to know exactly whats in your carb I can tell you but I need the parts list off the carb.I have a parts catalogue and all parts for individual carbs are listed by the carb #.

By speedpro56 - 15 Years Ago

From what I've seen on alot of teapots they seem to have 50 to 52s in the primaries and 78s for the secondaries. Lincolns were alittle larger.

By Kahuna - 15 Years Ago

Thanks you both for the help. I'll get the list number tomorrow when I get home. Thanks again

Jim

By Ted - 15 Years Ago

The list number at the back of the carb is necessary but so is the engine size and transmission just in case the carb is no longer original to the engine. For the ’56 Y’s equipped with Teapots, the automatics used a #50 jet in the primaries while the standard transmission equipped vehicles used a #49 primary jet. If the engine was going to be operated between 5,000 & 10,000 feet then the primary jetting would decrease by 1 number.

By pegleg - 15 Years Ago

Ted (1/2/2010)

that's interesting, wonder why a standard transmission would be leaner. They were more likely to be "lugged" at low RPM, but that wouldn't be helped by the main jet size.

By Kahuna - 15 Years Ago

OK, Here's the numbers on the carbs: ECZ-9510 List #1161-2.

My goal is to make sure that I have a correct starting point, as I don't know the history of the carbs I have. Needs are primary mains, secondarys and power valve.

Thanks for any help

Regards

Jim

Almost forgot. My carb listing says this carb came off a 56 312 engine

By oldcarmark - 15 Years Ago

Jim! At the end of 9510 there is another 1 ,2.or 3 letters which I need to get into the correct carb list.

By Ted - 15 Years Ago

Kahuna (1/2/2010)

OK, Here's the numbers on the carbs: ECZ-9510 List #1161-2.

The 1161-2 carb will have a ECZ-9510-M part number at the back of the carb or ECZ-M on the tag. This particular carb (according to my literature) is listed as having the sea level to 5000’ jetting as #50 for the primaries and #73 for the secondaries. For 5,000’ to 10,000’ the primary jets reduce to #49 and to #63 for the secondaries. The jetting on this particular carb does not differentiate between standard and automatic transmissions and this carb is also listed as being used on both 292 & 312 engines in 1956.

Mark. Do these jetting numbers agree with your literature assuming the carb is a ECZ-M?

Jim. As far as the power valve goes, you’re likely going to be stuck with what comes in the carb rebuild kit. Where the power valve needs to open a little sooner, drawing 2 or 3 of the pv spring coils together with a pair of staples can get you there but it’s trial and error doing it this way. The Ford parts book actually lists a variety of power valves for the different Holley 4000 applications but no specifications or rates for these are given.

By oldcarmark - 15 Years Ago

Yes Ted I think you are correct.

By Kahuna - 15 Years Ago

Thank you guys so much. I sure apologise, as I somehow forgot to include the "M" after the 9510. I should have written ECZ 9510-M. I think I've got CRAFT. Comes with old age

Best regards

Jim

By Kahuna - 15 Years Ago

Is it possible to post a photo on this site? I'd like to show you all the manifold for the carbs. Hmmm, let me try this

Regards

Jim

By marvh - 15 Years Ago

You are going to make that flathead pretty wild.

marv