HOLLEY Cfm Double Pumper Carburetor Choke Rod L-4778-1

( Brand: Holley ), ( Manufacturer Part Number: 4778-1 ), ( Choke Type: No Choke ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Country/region Of Manufacture: United States )

Review HOLLEY Cfm Double Pumper Carburetor No Choke Hot Rod fits STREET 700

The Holley 4778-1 700 CFM Double Pumper Carburetor, also known as the L-4778-1 with choke, is a high-performance fuel delivery system designed for hot rods and other vintage vehicles. This carburetor is a must-have for enthusiasts seeking optimal engine performance and classic style.

Measuring 3.375 inches in diameter and 11.5 inches in length, this double pumper carburetor delivers an impressive 700 CFM airflow rate. Its unique design features two separate fuel pumps that ensure consistent fuel delivery to the engine, making it an excellent choice for high-performance applications. The inclusion of a choke mechanism allows for easy cold starting, ensuring a smooth and hassle-free driving experience, even in less-than-ideal weather conditions.

The Holley 4778-1 carburetor is crafted from high-quality materials, including a durable aluminum body and brass fuel bowls. Its vintage appearance, with its classic round shape and polished finish, is sure to complement any hot rod or custom vehicle. The carburetor comes equipped with a 650 CFM primary and a 150 CFM secondary venturi, providing ample fuel flow for large engines.

Additionally, this carburetor features a number of convenient design elements, such as a removable bowl gasket for easy maintenance, adjustable idle mixture screws, and a built-in accelerator pump for improved throttle response. The Holley 4778-1 double pumper carburetor is also compatible with a range of fuel systems, including electric and mechanical fuel pumps.

Installing the Holley 4778-1 carburetor is a relatively straightforward process, thanks to its universal mounting pattern and included hardware kit. However, it is essential to ensure proper installation to ensure optimal performance and fuel efficiency. The carburetor's generous airflow rate and dependable fuel delivery make it an excellent choice for hot rods, custom cars, and other high-performance applications, providing the power and style that enthusiasts crave.

The Holley 4778-1 700 CFM Double Pumper Carburetor (L-4778-1 choke, street rod application) is a popular choice among hot rod and custom car enthusiasts. This carburetor offers several benefits, but it also comes with some potential drawbacks that are essential to consider before making a purchase.

1. High Flow Rate: The 700 CFM flow rate makes it suitable for high-performance applications, providing an adequate fuel supply for larger engines.

2. Double Pumper Design: This design offers improved vacuum secondary circuit, providing a more consistent fuel mixture under various engine loads and RPMs.

3. Choke: The integrated choke system offers ease of use and eliminates the need for additional accessories.

4. Versatile: The Holley 4778-1 can be used in a wide range of applications, including street rods, hot rods, and custom cars.

5. Customizable: Holley offers various options for jetting, emulsion tubes, and base plates, allowing for fine-tuning to meet specific engine requirements.

1. Complexity: The carburetor's double pumper design may be more complex than single-pumper alternatives, requiring more time and expertise for installation and tuning.

2. Cost: The increased complexity and higher performance capabilities result in a higher price point compared to some other carburetors.

3. Fuel Efficiency: Due to its high flow rate and performance capabilities, this carburetor may not be the most fuel-efficient option for everyday driving.

4. Maintenance: A high-performance carburetor like the Holley 4778-1 requires regular maintenance to ensure optimal performance.

The Holley 4778-1 700 CFM Double Pumper Carburetor is a powerful and versatile option for hot rod and custom car enthusiasts. Its high flow rate, double pumper design, and integrated choke system offer numerous benefits for high-performance applications. However, its complexity, cost, and potential impact on fuel efficiency are essential considerations before making a purchase. If you are looking for a high-performance carburetor for your hot rod or custom car project and are willing to invest the time and resources into its installation and tuning, the Holley 4778-1 could be an excellent choice for you.

If you are in the market for a high-performance carburetor for your hot rod or custom car project and are willing to invest the time and resources into its installation and tuning, the Holley 4778-1 700 CFM Double Pumper Carburetor is an excellent choice. Its versatility, customizability, and powerful performance make it a popular choice among enthusiasts. However, if you are looking for a more cost-effective or fuel-efficient option, you may want to consider alternative carburetors with lower flow rates or simpler designs.

Details:

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part #: 47781 prices

• $66.49-$88.60

specifications carbcoon:

• for models: 700, Street
• brand: Holley
• mpn: 4778-1
• choke type: No Choke
• type: Carburetor
• mounting flange type: Square Bore
• country/region of manufacture: United States

seller carbcoon:

• # reviews: 3790
• rating: 100.0%
• city: Fair Oaks, California

offer carbcoon:

• started: April 30, 2025
• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• best offers: True

shipping carbcoon:

• transit: 2-6 Days
• type: Fixed
• cost: $28.00
• class: Standard
• service: FedEx Ground or FedEx Home Delivery
• carrier: FedEx

payments carbcoon:

• other
• money order
• credit card: Discover
• wallet: Apple-pay

general carbcoon:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
• condition: Used

returns carbcoon:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

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