HOLLEY MB4788 Carburetor Body Cfm Milled Choke Racing Carb 4150 4-BARREL 830

( Brand: Holley ), ( Type: Double Pumper ), ( Manufacturer Part Number: MB4788 )

Review HOLLEY 4150 4-barrel 4788 Carburetor Main Body 830 Cfm Milled Choke Racing Carb

The Holley MB4788 4150 4-barrel carburetor body is a high-performance racing carburetor designed for applications requiring large CFM intake airflow. This carburetor body is part number 4788 in Holley's extensive line of carburetors and is suitable for use with 830 CFM secondary venturis.

The MB4788 is a 4150-series carburetor, which refers to the size of the primary and secondary bore. The primary bore measures 4150 thousandths of an inch, while the secondary bore measures the same. The body is made of high-quality aluminum and is machined to exacting tolerances for optimal flow and reliability.

This racing carburetor features a 4-barrel design, meaning it has four separate barrels or throats, each feeding a corresponding cylinder in a four-cylinder engine. The use of four barrels allows for better fuel distribution and more precise fuel delivery compared to a single or dual-barrel carburetor.

One of the most notable features of the Holley MB4788 is its milled choke design. The choke mechanism is machined directly into the body, eliminating the need for an external choke assembly. This design reduces weight and simplifies installation. The choke plate is operated by a cable and can be easily adjusted to provide the desired amount of enrichment during starting.

The MB4788 is also compatible with Holley's various vacuum secondary systems, such as the HP and Dominator systems. These systems allow for fine-tuning of the fuel mixture by adjusting the secondary vacuum plate position based on engine vacuum. This results in improved idle quality, better mid-range performance, and more consistent power delivery throughout the RPM range.

In summary, the Holley MB4788 4150 4-barrel 830 CFM milled choke racing carburetor body is a high-performance component suitable for serious racing applications. Its 4-barrel design, machined choke mechanism, and compatibility with Holley's vacuum secondary systems make it an excellent choice for those seeking optimal power and reliability from their engine.

The Holley MB4788 4150 4-barrel 4788 carburetor body, with a CFM rating of 830 and a milled choke, is a popular choice among racing enthusiasts. When considering purchasing this carburetor, here are some pros and cons to help make an informed decision.

1. High Air Flow: The 830 CFM rating makes this carburetor suitable for high-performance applications, enabling more air and fuel mixture to enter the engine, leading to increased horsepower and torque.

2. Milled Choke: The milled choke feature allows for precise control of the idle mixture and quicker throttle response. It also ensures proper vacuum operation for the choke system.

3. Customizable: Holley carburetors are known for their versatility. This model can be easily adapted to meet specific engine requirements with various base plate options, fuel bowls, and jetting configurations.

4. Durable Construction: The MB4788 uses high-quality materials, including billet aluminum, to provide increased strength and resistance to corrosion.

5. Improved Design: Holley's latest carburetor designs include features like a larger fuel bowl, reduced fuel level sensitivity, and improved idle circuits, resulting in better performance and reliability.

1. Complexity: Holley carburetors can be more complicated to set up and tune compared to some other options, especially for beginners.

2. Cost: The price of a Holley MB4788 can be higher than other carburetors due to its high performance capabilities and customizability.

3. Limited Applications: This carburetor is designed primarily for racing applications, so it may not be suitable for everyday driving or street use.

The Holley MB4788 4150 4-barrel 4788 carburetor body offers excellent high-performance capabilities, customizability, and durability. However, its cost and complexity may not be suitable for everyone, and it is mainly intended for racing applications.

If you're looking for a high-performance carburetor for a racing application and are willing to invest the time and resources into its setup and tuning, the Holley MB4788 could be an excellent choice. If you're seeking a more affordable, simpler option for daily driving, you may want to consider alternative carburetors or fuel injection systems.

part # mb4788 prices

• $49.99-$225.00

specifications carbcaddie:

• brand: Holley
• type: Double Pumper
• manufacturer part number: MB4788

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• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts
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• quantity: 1
• started: September 8, 2025
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