HOLLEY Carburetor Base Plate Double Pumper 4150 12R-4770B

( Brand: Holley ), ( Type: Base Plate ), ( Manufacturer Part Number: 12R-4770 ), ( Performance Part: Yes ), ( Universal Fitment: No )

Review HOLLEY Carburetor 4150 Bbl Base Plate Double Pumper

The Holley 12r-4770 carburetor, specifically the 12r-4770B double pumper variant, is a legendary performance carburetor renowned for its ability to deliver excellent fuel flow in high horsepower applications. This 4150 base plate carburetor is designed primarily for use in larger engines, particularly those found in hot rods, muscle cars, and other high-performance vehicles.

The 12r-4770B carburetor is equipped with a dual-pumper mechanism which ensures a consistent fuel supply even under heavy engine loads. This design feature sets it apart from the standard 4150 carburetor with a single pump, offering increased fuel pressure and improved fuel atomization for a smoother and more efficient combustion process.

The 12r-4770B also features a robust cast aluminum body coupled with a tapered roller throttle shaft that allows for smooth throttle response and improved idle quality. Its 750 CFM (cubic feet per minute) airflow rate caters to a broader range of performance demands while its secondary vacuum secondary can be adjusted for optimal power production and drivability.

Additionally, it comes with a Holley Ultra Lite 1050 Dominator fuel pump designed to meet the demands of high-performance applications, ensuring a reliable fuel supply to the carburetor even under high RPMs. Installation is streamlined with the inclusion of a replaceable 5/16-18 stud fuel bowl gasket, while the top cover features a raised deck for easy vacuum port access.

Even with its powerful performance capabilities, this carburetor is designed to be easily tunable. Holley offers a wide variety of mechanical and electrical options, such as vacuum secondary kits, power valves, automated choke options, and electronic fuel injection systems. Combine that with the 4150 base plate's well-known adjustability, you'll have a carburetor that can be fine-tuned to suit the unique requirements of virtually any high-performance engine application.

The 12r-4770B Holley 4150 double pumper carburetor is an exceptional choice for automotive enthusiasts seeking to maximize the power output of their engine while maintaining optimal fuel efficiency. With its robust design, high airflow rate, and customizable options, this carburetor ensures a thrilling and enjoyable driving experience.

The Holley 12r-4770 carburetor with the 4150 base plate and 12r-4770b double pumper is a popular choice for performance enthusiasts looking to improve their engine's fuel delivery system. This carburetor offers several advantages and disadvantages, which are as follows:

1. High-Performance: The Holley 12r-4770 carburetor is a high-performance carburetor designed to deliver precise fuel mixtures for increased horsepower and torque. Its double pumper design provides better vacuum secondaries for improved idle quality and mid-range power.

2. Versatile: This carburetor is suitable for a wide range of applications, from street use to racing. It can be used on small-block Chevy, Ford, and Chrysler engines.

3. Adjustable: The Holley 12r-4770 carburetor is highly adjustable, allowing users to fine-tune the fuel mixture to optimize engine performance. Adjustments can be made to idle mixture, main jets, transition jets, and other components.

4. Durable: The Holley 12r-4770 carburetor is built to last, with high-quality materials and robust construction. It has a billet aluminum base and a heavy-duty diaphragm belt drive.

5. Easy to Install: Holley carbs come with detailed instructions, making installation easier for most enthusiasts. It also comes with a base plate and double pumper, making it a complete kit.

1. Complexity: The Holley 12r-4770 carburetor is more complex than a standard single-barrel carburetor, which can make it more difficult to set up and adjust optimally.

2. Maintenance: This carburetor may require more frequent maintenance due to its complexity and high performance. It may also require specialized tools for adjustment and tuning.

3. Cost: The Holley 12r-4770 carburetor is more expensive than a standard single-barrel carburetor, which can be a deterrent for some enthusiasts.

In conclusion, the Holley 12r-4770 carburetor with the 4150 base plate and 12r-4770b double pumper is an excellent choice for those seeking high-performance fuel delivery. Its versatility, adjustability, durability, and ease of installation make it a popular option among performance enthusiasts. However, its complexity, maintenance requirements, and cost may not be suitable for all applications. Ultimately, whether or not this carburetor is right for your project depends on your specific needs and budget.

If you're looking for a high-performance carburetor and have the ability and willingness to invest in the necessary time and resources for tuning and maintenance, then the Holley 12r-4770 carburetor is an excellent choice. However, if you're looking for something more straightforward and cost-effective, you may want to consider a single-barrel carburetor.

part # 12r4770 prices

• $25.00-$60.00

specifications carbcaddie:

• brand: Holley
• type: Base Plate
• manufacturer part number: 12R-4770
• performance part: Yes
• universal fitment: No

payments carbcaddie:

• credit card: Visa
• wallet: Paypal
• other

general carbcaddie:

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

returns carbcaddie:

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

shipping carbcaddie:

• class: Standard, One-day, Expedited
• cost: $17.45
• carrier: UPS
• type: Calculated
• service: UPS Ground, UPS Next Day Air, UPS Next Day Air Saver, UPS 2nd Day Air
• transit: 4-11 Days

offer carbcaddie:

• sold: 0
• quantity: 1
• options: Ship-to-home
• started: December 20, 2024
• availability: In Stock

seller carbcaddie:

• # reviews: 644
• rating: 99.6%

Holley 12R-4770 Is Similar To:

• Ford D0of-9510-n 1970 Cobra Jet 429 Scj Manual 4 Speed Holley Carburetor List 4627 As Is (30% similar) $223.99–$2672.99. (August 23rd, 2024)
• Holley 12r-5204b Carburetor Throttle Base Plate #0559 (60.8% similar) $19.00–$190.68. (August 23rd, 2024)
• Holley 12r-4251b Carburetor Throttle Base Plate #0574 (60.8% similar) $24.95–$58.63. (August 23rd, 2024)
• Holley 3887686 2 Bbl 500 Cfm Marine Carburetor Volvo Penta 4.3l For Parts Or Rebuild (39.7% similar) $159.99–$650.00. (August 23rd, 2024)
• Holley 34r-6551-b Electric Automatic Choke Housing Base Assembly 4150 4160 (30.1% similar) $19.95–$35.00. (August 24th, 2024)
• Holley 12r-4507b 650-800 Dp Double Pumper Base Plate Baseplate 4160 4779 4777 4778 4780 (37.7% similar) $80.00–$199.99. (August 24th, 2024)
• Holley 36-181 Carburetor Metering Jet 2 Of Each Size Contact Prior Ordering (40.8% similar) $88.00–$98.45. (August 24th, 2024)
• Holley 5583-4519 1968 1969 Metering Plate 5583 For 4053 4346 Chevelle Camaro 396 427 Copo (33.5% similar) $999.99–$1499.99. (August 24th, 2024)
• Holley 8485-1947 Primary Front Metering Block 18502 600 Vacuum Secondary Carburetor (28.4% similar) $25.00–$199.00. (August 24th, 2024)
• Holley 37-1536 Carburetor Renew Kit 4160 (42.9% similar) $119.99–$218.35. (August 25th, 2024)
• Holley 80457-2 List Carburetor 600cfm 4bbl 4160 Main Body Only With New Gasket (41.3% similar) $8.35–$11.25. (August 26th, 2024)