Often asked: How To Identify Holley Carburetor?

How do I know which Holley carburetor I have?

It’s like a “VIN” for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. The list number typically is four to six digits long and may or may not have a suffix number behind it. The date code will be right below it.

What do the numbers on a Holley carb mean?

The first three numbers indicate the day of the year; the last digit, the year of manufacture. Here, “2889” indicates a carb made on the 288th day (which falls in the month of October), of a year ending in 9 (1969, 1979, 1989, 1999, etc.).

How do I know what carburetor I have?

The list number is stamped on your carburetor, either on the corner of the airhorn or choke tower or, if it doesn’t have an airhorn, on the mainbody. Remove the carburetor from your vehicle before looking for the list number to easily find the information you need.

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How do I know what CFM my Holley carb is?

Will a bigger carb make more power?

  1. Performance Improvements stocks carbs from Holley Performance, Edelbrock and Proform Parts.
  2. The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456.

What’s the difference between Holley 4150 and 4160?

These two are very similar with the primary difference that the 4150 uses a thick metering block in both the primary and secondary while the 4160 is shorter in length and uses a thin, metering plate on the secondary side.

How do you read a date code on a Holley?

Moving on, 0798 is our date code; Holley used a three digit up to 1973, after which they moved to the four digit code you see here. Decoding them is as follows: Three Digit – Example 763 > 7 – Year (1967), 6 – Month (June), 3 – (Third Week)

What CFM is a Holley 4160?

Holley 0-80457S Model 4160 600 CFM Square Flange 4-Barrel Vacuum Secondary Electric Choke Carburetor.

What size carburetor do I need for a 350?

A 600-cfm carburetor may perform quite well on a stock 350 Chevy. However, the minute you start weaving in power adders like a hotter cam, a dual-plane performance intake manifold, and aluminum heads you’re going to need 700-750 cfm.

Did Holley buy demon?

We reported that BG Fuel Systems and Demon Carburetors were poised for a comeback in a blog earlier this week. The fact that the company was bought by High Performance Industries, the same company that owns Holley, Demon’s biggest competitor, has created a bit of a stir in the automotive aftermarket.

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How do I know what Rochester carburetor I have?

All Rochester Quadrajet carburetors are identified by a seven- or eight-digit GM part number. On units made before mid-1968, the part number was stamped around the outside edge of a round metal tag attached to the fuel bowl.

What size carburetor do I need for a 360?

If the engine is mostly stock the 600 – 625 cfm should be fine. If the engine is hot rodded, and you race it, then a 750 cfm would give you slightly more power.

Is quick fuel made by Holley?

On December 8, 2014, Holley acquired DiabloSport Inc. The industry leader in vehicle calibration.

What size cfm carb do I need?

The engine’s volumetric efficiency is a measurable value and with a correctly matched carburetor you will receive the best performance possible out of your engine. The formula for calculating how much CFM (cubic feet per minute) an engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456.

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