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  3. HOLLEY 4778-8

HOLLEY 4778-8 Cfm Barrel Carburetor General

fits model: 700.

4778-8 Holley 700 Cfm 4 Barrel Carburetor General Motors Vintage

( Brand: Holley ), ( Manufacturer Part Number: 4778-8 ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Country/region Of Manufacture: United States ), ( Vintage Part: Yes )

Review HOLLEY Cfm Barrel Carburetor General Motors Vintage fits 700

The Holley 4778-8 700 CFM Double-Pumper Barrel Carburetor is a high-performance, fuel-injected carburetor designed for serious enthusiasts seeking optimal engine response and unparalleled fuel management in their hot rods, muscle cars, and high-performance applications. This carburetor boasts an impressive 700 CFM airflow capacity, making it suitable for large displacement engines requiring generous fuel delivery.

The 470 series Double-Pumper design features two independent fuel pumps, each capable of supplying fuel to a separate set of jets. This ensures consistent fuel delivery under varying engine loads and speeds, leading to improved drivability and power delivery. The Holley Ultra Lite 6-71 Blower Kit compatibility expands the versatility of this carburetor, making it an excellent choice for supercharged applications.

This carburetor comes equipped with Holley's advanced vacuum secondary system, which utilizes a vacuum secondaries porting design. This system provides excellent vacuum sensitivity, allowing the secondary circuits to engage smoothly at low engine RPMs, producing a powerband that is both broad and responsive. The vacuum secondaries can be tuned using a simple, 3-screw adjustment process, enabling fine-tuning for optimal performance.

The Holley 4778-8 barrel carburetor is constructed from high-quality materials, including a billet aluminum body and brass components. Its heavy-duty design ensures durability, even under the most demanding driving conditions. The barrels are machined with a precision bore size to provide excellent intake manifold and gasket sealing, ensuring a proper seal and minimal air leakage.

Holley's 4-corner adjustment system allows individual adjustment of the carburetor's primary and secondary bowl levels, providing precise tuning for various engine configurations and fuel requirements. The built-in accelerator pump and power valve allow easy, independent adjustment for smooth idle and quick throttle response.

Additionally, this carburetor comes with a high-performance, electric choke system, making it easy to start the engine, even under cold conditions. The carburetor also features a built-in fuel pressure regulator, allowing for easy fuel pressure adjustment.

In summary, the Holley 4778-8 700 CFM Double-Pumper Barrel Carburetor is a top-tier, fuel-injected performance carburetor designed for large displacement engines and demanding applications. Its advanced features, including independent fuel pumps, vacuum secondary system, 4-corner adjustment, and heavy-duty construction, make it an excellent choice for enthusiasts seeking optimal engine response and unparalleled fuel management.

The Holley 4778-8 700 CFM double-pumper barrel carburetor is a popular choice for performance enthusiasts looking to improve the fuel delivery system in their hot rods and muscle cars. Here are some pros and cons to help you make an informed decision about purchasing this carburetor:

Pros:

1. High Flow Rate: The 700 CFM flow rate makes this carburetor suitable for high-performance applications, providing ample fuel for large engines.

2. Double-Pumper Design: The double-pumper design allows for better vacuum secondaries, resulting in improved idle quality and mid-range performance.

3. Customizable: Holley offers various options to customize this carburetor, including different base plates, linkage kits, and throttle shafts, to fit various applications.

4. Reliable: Holley carburetors have a reputation for durability and reliability, making them a popular choice for performance enthusiasts.

5. Easy to Tune: The Holley 4778-8 is considered easy to tune, making it a good choice for those looking to optimize their engine's performance.

Cons:

1. Complexity: The double-pumper design can be more complex to install and tune compared to single-barrel carburetors.

2. Cost: The Holley 4778-8 is more expensive than some other carburetors on the market, making it a significant investment for some enthusiasts.

3. Fuel Mileage: The high-performance nature of this carburetor may result in reduced fuel mileage, which could be a concern for some.

4. Requires Specific Knowledge: Installing and tuning a Holley 4778-8 requires specific knowledge and experience, making it a better choice for those with a solid understanding of carburetion.

Conclusion:

The Holley 4778-8 700 CFM double-pumper barrel carburetor is a high-performance, customizable, and reliable option for those looking to improve their engine's fuel delivery system. However, its complex design and cost make it a better choice for experienced performance enthusiasts with a solid understanding of carburetion. For those looking for a more straightforward and affordable option, other single-barrel carburetors may be a better fit.

Recommendation:

If you're an experienced performance enthusiast with a high-performance engine and a solid understanding of carburetion, the Holley 4778-8 700 CFM double-pumper barrel carburetor is an excellent choice for maximizing your engine's potential. However, if you're new to carburetion or have a more modest performance goal, a single-barrel carburetor may be a better and more cost-effective option for you.

Details:

Selling for parts and pieces Ask any all questions before purchasing. 4778-8 0775 date code Needs cleaned up.

part #: 47788 price

  • $699.00

specifications carbcoon:

  • for models: 700
  • brand: Holley
  • mpn: 4778-8
  • choke type: Mechanical
  • type: Carburetor
  • mounting flange type: Square Bore
  • country/region of manufacture: United States
  • vintage part: Yes

general carbcoon:

  • condition: For parts or not working
  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

shipping carbcoon:

  • service: UPS Ground
  • transit: 4-7 Days
  • type: Fixed
  • cost: $14.99
  • carrier: UPS
  • class: Standard

seller carbcoon:

  • city: Washington Court House, Ohio
  • # reviews: 681
  • rating: 100.0%

offer carbcoon:

  • options: Ship-to-home
  • sold: 0
  • started: March 6, 2025
  • availability: In Stock
  • quantity: 1
  • best offers: True

returns carbcoon:

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

payments carbcoon:

  • credit card: Discover
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  • wallet: Google-pay
for models: 700, choke type: mechanical, type: carburetor, mounting flange type: square bore, country/region of manufacture: united states, vintage part: yes,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, sku: 4954379231416504,

Holley 4778-8 Is Similar To:

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1 offer $699.00 USD
  • Offer #1: $699.00 price + $37.00 shipping estimate = $736.00* total. Note, slight crack on rear vent tube area - but tube is still tight in housing. Holley 700cfm double pumper 4 barrel carburetor.+$37.00 shipping

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