The Stovebolt Site Forums The Shop Area Engine Shop Holley 1920

Can anyone tell me if a Holley 1920 will work on a 1957 235?Thanks Al

I'm not too familiar with the 1920, but i'm running a pair of 1904s on mine, If the bases are the same, and the throttle arms are the right direction, it should be fine. I know I like mine.

Al - with no disrespect intended, this question is like many "will it work" carburetor questions - insufficient information.

The Holley 1920 is a model of carburetor. The 1920 is a one-barrel; that is all we know. Different versions of the 1920 were used on everything from a Ford 144 CID to a Ford 300 CID six. These different models have significantly different internal venturi sizes, thus significantly different airflow.

As a general rule, when migrating an O.E. (original equipment) carburetor from 1 application to another, it is not wise to vary the displacement more than + - 3 percent. So if we take 3 percent of 235, we have 7 cubic inches. Therefore you could use a different O.E. carb from engine of displacements 228 ~ 242 CID.

Jon.

Jon,no offence taken,I thank you for the input!Well the next question would be,How do I know what the original application is? Thanks Al

Jon, when using a carb in a multi carb setup, how should one select them? Is there a golden rule like the displacement noted below?

I am going to put a pair of Holleys (probably 1904s or some other glass bowl single) on my truck, a Dodge flathead. My selection was going to be a pair from an engine around 170 cu in. does that sound right?

I like the holleys because of the cool looking glas bowls, but mostly because of the ease of changing power valve calibration.

Any words of wisdom for me???

Al - turn the carburetor such that you may read the word "Holley" on the bowl. There should be a "boss" standing proud of the carburetor to you left which houses the fuel inlet. Clean the side of the boss facing you; then with a good light, a strong glass, and a pair of "young" eyes, read the "LIST" number. You can then "Google" that number without the "R-", and find the application.

KENC - at the price of gold, you want ANOTHER golden rule??? The requirements for multiple carbs will vary, depending on many things, but as a starter (2) 216 Chevy Carter W-1's work really well on a mild to medium street 235.

What engine is in your Dodge?

Jon.

Jon,
My Dodge has the 230, and I'm adding a a833 OD this winter.

Is there a web source for info on the 1904 and similar Holleys?

I have found one that is supposed to be the complete list of 'list' numbers but many of the carbs I find are not on that list.

There are some that look like the 1904 but have external 'normal' power valves as well as the one under the top cover

KenC - First let me tell you that I cannot recommend the Holleys (Holleys don't like me, they all seem to think I am a practicing fireman!!!); but I won't try to talk you out of them.

If we were recommending some real carburetors for your application, we would suggest a pair from O.E. engines of about 200 ~ 215 CID.

As to the Holley list numbers: we bought the booklet from Holley that has "all" Holley carburetors, as we manufacture kits, and thought this would be a great reference, however, we have more than 1000 entries of Holley applications in our database that were NOT listed in the official booklet.

Eventually, we will get our entire database published on our website, but it takes time (currently more than 100,000 applications). In the meantime, simply try using Google with 2 search strings: The first "The Carburetor Shop" and use the quotes, the second the carburetor number. If we have that number published, Google will bring you to a page on our website. Open that page, and then use the "find" command in your browser (under "Edit" in IE) and enter the carb number without any prefix or suffix.

Example: if you have a Holley LIST number R-2418-AAS then use this string:

"The Carburetor Shop" 2418

This gets you into our site. Now use the find command and enter 2418. This takes you to a line that says 1962 Dodge 225 Holley 1920.

Virtually all passenger applications from 1897 to 1974 are currently published. We are currently working on tractor listings. Once the tractor listings are done, we will switch to trucks, although we have already done the more common trucks. You can easily identify many carburetors using this method.

Jon.

The number I have under the fuel inlet is 12R3955B
1.50 Thanks for all the help! Al

Al, the number should be stamped, not raised. The 12R prefix is normally a raised number, and is a casting number for the body blank (not meaningful). You are looking for the word "LIST".

Jon.

If you look down from the top over the fuel inlet stamped is the numbers 3975 S 070 2 Are these the numbers? Thanks again Al

The numbers are STAMPED ON the fuel inlet boss. They are not raised.

Jon.

I really dont know what to say but those are all the numbers I can find with a magnifing glass!Thats it,I dont know,still I need help Thanks Al

Holley 1920