LABWORK TL30505Q Carb Quadrajet Vacuum Secondary 1904R 4BBL 4MV 750CFM

( Brand: Labwork ), ( Manufacturer Part Number: TL30505Q ), ( 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 LABWORK Carb For Rochester Quadrajet 4mv Vacuum Secondary 750cfm

The TL30505Q 4-barrel carburetor from Holley is specifically designed for use with 1904R Rochester Quadrajet 4MV vacuum secondary systems. This carburetor boasts a generous 750 CFM airflow rate, making it an excellent choice for high-performance applications.

The TL30505Q is a quad-barrel carburetor, meaning it features four separate barrels to deliver fuel to each cylinder in your engine. This design promotes optimal fuel distribution and efficient combustion. The vacuum secondary system ensures proper fuel mixture adjustments under varying engine vacuum conditions.

This Holley carburetor is meticulously constructed with high-quality materials for durability and reliability. The primary and secondary bowls are crafted from corrosion-resistant aluminum, while the primary float bowls include a unique design to minimize fuel sloshing and promote consistent fuel delivery.

The carburetor comes equipped with Holley's proven Accelerator Pump Kit, which includes a high-volume accelerator pump and a heavy-duty diaphragm to deliver quick and efficient response during acceleration. The choke system is also included, featuring a simple-to-use lever design for easy operation.

The TL30505Q 4-barrel carburetor is designed to work seamlessly with the 1904R Rochester Quadrajet 4MV system, ensuring a perfect fit and optimal engine performance. The carburetor comes with all necessary hardware for installation, making the process as straightforward as possible.

In summary, the Holley TL30505Q 4-barrel carburetor is a high-performance, vacuum secondary 750 CFM unit specifically engineered for use with 1904R Rochester Quadrajet 4MV systems. Its robust design, efficient fuel delivery, and quick response make it an excellent choice for those seeking optimal engine performance.

The Rochester Quadrajet 4CV carburetor, specifically model 1904R, is a vacuum secondary carburetor with a 750 CFM flow rate. The TL30505Q 4BBL carburetor is a 4-barrel version of the same Quadrajet series, but with some differences that could impact its suitability for use as a replacement for the 1904R in a 1965-1966 Chevrolet Corvette application. Here are some pros and cons to consider:

1. Enhanced performance: A 4-barrel carburetor typically provides better fuel distribution and air flow, leading to improved engine performance.

2. Customization: A 4-barrel carburetor offers more tuning possibilities due to the individual throttle bodies, which can be beneficial for those seeking maximum power output.

3. Availability: The TL30505Q 4BBL carburetor may be more readily available in the aftermarket compared to the 1904R Quadrajet 4CV.

1. Complexity: A 4-barrel carburetor is more intricate than a 2-barrel or 1-barrel carburetor, which could make it more difficult to install and tune.

2. Cost: A 4-barrel carburetor is generally more expensive than a 2-barrel or 1-barrel carburetor due to its additional components and complexity.

3. Compatibility: The TL30505Q 4BBL carburetor may require some modifications to fit and function correctly in a 1965-1966 Corvette with a 1904R Quadrajet 4CV. This could include engine modifications, fuel system changes, and wiring adjustments.

In conclusion, while the TL30505Q 4BBL carburetor offers some potential advantages such as improved performance and customization, the cons, including complexity, cost, and compatibility, should be carefully considered before making a decision. If the primary goal is to maintain factory-correct specifications and originality, sticking with the 1904R Quadrajet 4CV is recommended. However, if performance gains or personal preference outweigh the challenges, the TL30505Q 4BBL could be a suitable alternative. Ultimately, the choice depends on the individual's goals, resources, and expertise.

Details:

Package Include. Fitment: For Chevy 1980 cars, use #1904R 17066422 17066425 Chevy/GMC trucks 1981 86 with electric choke, or #1906R 1901 7026202 7026203 7026210 7027202. W/o Product Instruction.: Auxiliary Venturi:7mm.

Due To The Different Display And Light, Picture May Not Reflect Actual Color Of Item. Venturi Choke tube: 31.7mm. Main jet:190.

part #: tl30505q prices

• $116.76-$142.30

specifications carbcoon:

• for makes: Rochester
• brand: Labwork
• mpn: Tl30505q
• 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

shipping carbcoon:

• type: Fixed
• service: Standard
• class: Standard
• transit: 4-8 Days
• cost: $0.00

general carbcoon:

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

offer carbcoon:

• best offers: True
• started: November 21, 2025
• availability: In Stock
• quantity: 10
• sold: 0
• options: Ship-to-home

returns carbcoon:

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

payments carbcoon:

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

seller carbcoon:

• # reviews: 127884
• city: Chino, California
• rating: 99.2%

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