ROCHESTER SU884645KU Carburetor Quadrajet Vacuum Secondary 1904R SKYUP2018 4BBL 4MV 750CFM

( Manufacturer Part Number: SU884645KU ), ( Type: Carburetor ), ( Specifications 1: Auxiliary Venturi ), ( Venturi Choke Tube : 31.7mm ), ( Features: Spread Bore Carburetor, Constant-vacuum, Quadrajet ), ( Choke Type: Electric ), ( Specifications 2: Main Jet ), ( Specifications 3: Idle Jet ), ( Needle Valve: 3.3 ), ( Oe/oem Part Number: 1981-1986 1906r ), ( Package Contents: Comes With Accessories, As Shown In The Picture ), ( Cfm: 650/750 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: 1904r 17066422 17066425 17066432 )

Review ROCHESTER Carburetor For Quadrajet 4mv Vacuum Secondary 750cfm fits 1980–1989

The Skyup SU884645KU 4-barrel carburetor is a high-performance replacement option for the original Rochester Quadrajet 4mv vacuum secondary carburetor on 1904r engines, specifically those manufactured between 1980 and 1989 with a 750cfm (cubic feet per minute) airflow rating.

This carburetor is designed with a quadrajet configuration, meaning it features four separate barrels arranged in a square pattern. Each barrel is equipped with a vacuum secondary system, which utilizes a vacuum diaphragm to provide an additional fuel mixture for improved engine performance under varying loads and RPMs.

The Skyup SU884645KU carburetor is engineered for durability and reliability, featuring a robust cast aluminum body and high-quality metering rods, jets, and gaskets. It comes with adjustable main jets, secondary idle jet, and idle mixture screws, allowing for fine-tuning to optimize engine performance and fuel efficiency.

Additionally, this carburetor is equipped with an electric choke, ensuring a smooth and efficient cold start. The choke system can be easily engaged and disengaged using the provided switch, providing the driver with convenient control over the starting process.

The Skyup SU884645KU 4-barrel carburetor comes with all necessary mounting hardware, making the installation process straightforward and hassle-free for most home mechanics. It is also compatible with a wide range of fuel systems, including both gasoline and methanol, providing versatility for various applications.

In summary, the Skyup SU884645KU 4-barrel carburetor is a top-quality replacement option for the Rochester Quadrajet 4mv vacuum secondary carburetor on 1904r engines. Its quadrajet configuration, durable design, adjustability features, and electric choke make it an excellent choice for those seeking improved engine performance and convenience.

The Skyup SU884645KU 4-barrel carburetor is a potential replacement option for a 1904r Rochester Quadrajet 4mv vacuum secondary 750cfm 80-89. Here are some pros and cons to help you make an informed decision:

1. Increased Power: The Skyup carburetor may provide better fuel mixture and air-fuel ratio, leading to increased horsepower and torque.

2. Cost-Effective: Compared to a new Quadrajet, the Skyup carburetor may be a more cost-effective option for those looking to save money.

3. Easier to Find: The Skyup carburetor may be easier to find and purchase than a new Quadrajet, especially if you are dealing with long lead times or availability issues.

1. Potential Compatibility Issues: While the Skyup carburetor may fit physically, there may be electrical or vacuum compatibility issues that need to be addressed.

2. Performance Differences: Although the Skyup carburetor may provide better power, it may also deliver different driving characteristics compared to the original Quadrajet.

3. Potential Need for Adjustments: The Skyup carburetor may require more fine-tuning to achieve optimal performance, which could involve additional labor and time.

While the Skyup SU884645KU carburetor may offer increased power and cost savings, it's essential to consider potential compatibility issues, performance differences, and the need for adjustments before making a purchase. Ultimately, the decision depends on your specific needs, budget, and willingness to invest time and resources in making any necessary modifications.

If you're comfortable with the potential challenges and willing to invest time and resources into making any necessary adjustments, the Skyup SU884645KU carburetor could be a suitable replacement option for your 1904r Rochester Quadrajet 4mv vacuum secondary 750cfm 80-89 engine. However, if you prefer a more plug-and-play solution or value the original driving characteristics, it may be worth considering other options or seeking professional advice.

Details:

Please refer to the listing pictures for an accurate of parts included in kit. As shown in the picture. Air correction jets:190. Specifications: Auxiliary Venturi:7mm.

Venturi Choke tube: 31.7mm. Main jet:190. It does not come with any installation instructions. New List Item.

part #: su884645ku prices

• $99.00-$199.99

specifications carbcoon:

• for makes: Rochester
• for years: 1980-1989
• mpn: Su884645ku
• type: Carburetor
• specifications 1: Auxiliary Venturi
• venturi choke tube : 31.7mm
• features: Spread Bore Carburetor, Constant-vacuum, Quadrajet
• choke type: Electric
• specifications 2: Main Jet
• specifications 3: Idle Jet
• needle valve: 3.3
• oe/oem part number: 1981-1986 1906r
• package contents: Comes With Accessories, As Shown In The Picture
• cfm: 650/750
• manufacturer warranty: 1 Year
• ipn: 1904r 17066422 17066425 17066432

seller carbcoon:

• # reviews: 12956
• rating: 99.2%
• city: Monroe Township, New Jersey

general carbcoon:

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

offer carbcoon:

• availability: In Stock
• best offers: True
• sold: 0
• options: Ship-to-home
• started: January 16, 2026
• quantity: 10

payments carbcoon:

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

shipping carbcoon:

• cost: $0.00
• type: Fixed
• class: Standard
• transit: 5-10 Days
• service: Standard

returns carbcoon:

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

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