How To Tell What Holley Carburetor I Have?

How do I tell what model my carburetor is?

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.

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 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 is 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.

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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 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.

What CFM is a Holley 4160?

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

What happens if my carb is too big?

If the barrels are too big, the loss of air velocity means the cylinder will not fill to its full capacity. An engine with a carb that is too big will put out less Torque and Horsepower. It will be difficult to drive due to poor low-end torque. If you drag race your car, an oversized carb will produce slow 60 ft.

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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What CFM is a Holley 4150?

Holley 750 cfm 4150 HP Carburetor Kit Includes 750 CFM Carb – 30cc Accelerator Pumps.

Is quick fuel made by Holley?

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

Does Holley make a 750 spread bore carburetor?

Holley Ultra Double Pumper 750 cfm Spread Bore 4BBL Carburetor.

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