Hoolley 4V identify

[Bruce Compton, Canada]

I just bought a holley 4v carb list # 1848-6 and with " PEP" also on the air horn . The vendor thought it was for a '58 Merc, and I was hoping someone in Fordbarnland could help with more inden. info. Thanks in advance : Bruce

[Ford blue blood]

Go to the Holley web site, there are tables with the list # and all the technical date, might help narrow it down.

[Bruce Compton, Canada]

Thanks Bill , but I can't find any mention of a 1848-6 on any of the official Holley sites. I'd really like to know the CFM rating and what kit to buy for it. Bruce

[rick55]

An 1848 is a 465cfm, vac secondary 4160 model carb. Buy a universal kit for that series and you will be OK. The power valve is determined by the use you give it.
Regards

[paul2748]

While it doesn't have a "6" number after it, 1848 carbs were used on 58-60 Fords, Tbirds, Edsels FE's.

Any Ford numbers on it?

[scicala]

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The Holley LIST 1848 was originally listed as a service carb for a '59 Edsel 361 engine. I'm sure it was used on other applications too. It was never originally installed on any Ford product. Also agree that the CFM rating is just below 500.

[Bruce Compton, Canada]

It has the number 1848-S and the letters "PEP" above the numbers on the air horn. If this carb was meant for a 361 Edsel, I'm thinking that it's going to be too much carb for a stock 256" Merc. Any suggestions ?? Bruce

[rick55]

The 1848, at 465 cfm, technically is marginally too big for a 256, but in use it will be fine. I like the 1848 for my 292's and they are great. I dont race them, I just drive them on the street.
A 390 cfm carb would be more suitable - Holley 0-8007 Model 4160 390 CFM Square Bore 4-Barrel Vacuum Secondary Electric Choke, but as you have this carb I would go with it. It will give you good throttle response.
Regards

[scicala]

I agree. I would stick with the 1848 carb. It's not that much larger than the stock '54 Merc Teapot carb. I think you'll like it. Plus you already have it, so no extra $$.

[scicala]

Bruce, one other thing If you are using the original distributor on you're '54 256, then the spark advance won't work right with the 1848 carb. You would need to update to a 1957 or later Y-Block dist.with mechanical and vacuum advance. Also may need to install the gear on your current dist, onto the 1957 or later dist, because your original may have a 13 tooth gear. I know at least '55 and up were 14 tooth gears.

[Bruce Compton, Canada]

Thanks Sal , Rick, Paul and Bill. I have already have switched the distributor and was considering modifying my teapot to supply ported manifold vacuum to go with the later distributor. However I now am looking at using either the 1848 Holley or maybe a Ford 4100 (1.08) 440 cfm type. Do you know the cfm rating of the original Holley 4000? I also have to decide whether or not to use the ECZ-B manifold with the possible mis-matched ports or use an adaptor on the original manifold. I'm in Florida now and will have to take a close look at what I actually have when I get home , as I never really looked close at the numbers on my engine, assuming it was a 100% original setup.Thanks again : Bruce

[Oldmics]

got this out of an article by Popular Hot Rodding

Holley Carbs
Numbers aren't always an indicator of quality, but the Holley modular fourbarrel is the most popular performance carburetor in the world. George and Earl Holley started building carburetors in 1904, and the company has since produced over 100 million units. After introducing a pair of 370-cfm fourbarrels in the early-'50s-Models 2140 and 4000-Holley launched its legendary 4150 model in 1957. Amazingly, that same basic design architecture has been chugging away for over 50 years, with continual refinements increasing airflow from 400 cfm in 1957 to more than 1,000 cfm today.
In another of their articles I saw where they said almost 400cfm for the 57 4100. There smallest 4100 was rated at 390 cfm and then it jumps to around ~500cfm

Oldmics