How can you tell which model of Holley carb is fitted on an engine?

1. How do I know what model Holley carb I have?
2. Where is the model number on a carburetor?
3. What's the difference between a Holley 4150 and 4160?
4. How do I know what size carburetor I have?
5. Is Holley 3310 a 4150?
6. How do I know what Rochester carburetor I have?
7. How do I identify my Zenith carburetor?
8. Is the Holley 4160 a double pumper?
9. Is a Holley 4150 a double pumper?
10. What cfm carb do I need for a 350?
11. What size carb do I need for a 383 stroker?
12. How much horsepower will a 650 cfm carb support?

How do I know what model Holley carb 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.

Where is the model number on a carburetor?

Look at the upper front of the carburetor on the piece known as the airhorn, or choke tower. This is a rectangular part of the carburetor with rounded edges, open to the top of the part. There will be a small number stamped there.

What's the difference between a 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 I know what size carburetor I have?

The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%.

Is Holley 3310 a 4150?

Once described as the small block Chevy of fuel delivery, the Holley 3310 carburetor (4150 and 4160 models) is still the go-to carburetor for anyone building a performance engine. ... That's when Holley developed a new carburetor, the 4150 carburetor, for the Y-block engines of the 1957-'58 Ford Thunderbirds.

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.

How do I identify my Zenith carburetor?

The inner circle will be the Zenith number. Aftermarket carburetors made during this period will have the Zenith part number only on the tag. Zenith carburetor produced after about 1980 will not have the round tag, but will have a tiny number stamped (never raised) in a semi-circle on the body of the carburetor.

Is the Holley 4160 a double pumper?

Holley 4160 Double Pumper Chrome Dual-Feed Fuel Line.

Is a Holley 4150 a double pumper?

Holley 4150 Overview

The 4150 carburetor was first introduced for the 1957-58 Ford Thunderbird. ... Often referred to simply as the “double pumper,” the 4150 and 4150-style carburetors fuel-feed inlets and a second full metering block on the secondary side, giving it dual accelerator pumps.

What cfm carb 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.

What size carb do I need for a 383 stroker?

Carburetor For 383 Stroker

recommends a 650 cfm carburetor. A 750 cfm carburetor will make the engine more powerful, but it is the largest that should be used unless the engine is being used for racing.

How much horsepower will a 650 cfm carb support?

So, using your Google-Fu you type "How much power can a 650 cfm carb support?" Well, chances are that you'll get answers in the 450-470 hp range, but that's not really the right way to look at it. In fact, horsepower—or even torque, for that matter—doesn't matter at all.