ROCHESTER 7045225 Quadrajet Carburetor 4-BARREL

( Brand: Rochester ), ( Manufacturer Part Number: 7045225 ), ( Type: Chevy ), ( Oe/oem Part Number: 350 )

Review ROCHESTER Quadrajet 4-barrel Carburetor Chevrolet Gmc Truck fits 1975–1976

The Rochester Quadrajet 4-barrel carburetor, model number 7045225, was a popular choice for 1975 and 1976 Chevrolet and GMC vehicles seeking optimal engine performance. This carburetor, a part of the Quadrajet series, is renowned for its ability to provide smooth idling, quick throttle response, and excellent fuel economy.

The Quadrajet 4-barrel carburetor features four separate throttle bodies, each with its own butterfly valve, which allows a more efficient fuel-air mixture to enter the engine. This design enables the engine to breathe more freely, leading to improved power and acceleration. The carburetor's secondary throttle valves open at a higher RPM to provide an additional boost of power when needed.

The Quadrajet 7045225 is equipped with a mechanical secondaries system. This means that the secondary throttle valves open based on engine vacuum rather than through electronic means. This design provides a more responsive feel, as the secondary throttle bodies open in relation to the engine's intake manifold vacuum.

The carburetor's bowl capacity is 21.5 ounces, and it has a primary venturi size of 1.60 inches, while the secondary venturis measure 1.33 inches. The Quadrajet's meticulously designed jetting ensures proper fuel mixture for a wide range of operating conditions.

The Quadrajet 4-barrel carburetor's design also includes an automatic choke system. This mechanism ensures that the engine receives the proper fuel-air mixture during cold starts, making for easier starting and smoother idling once the engine is warm.

This Rochester Quadrajet carburetor is an essential component for maintaining the performance and reliability of 1975 and 1976 Chevrolet and GMC vehicles. Its distinctive design and proven capabilities make it a preferred choice for enthusiasts and restoration projects alike.

The Rochester Quadrajet 4-barrel carburetor was a popular option for General Motors vehicles, including Chevrolet and GMC models, during the 1970s. Here are some pros and cons to consider if you're thinking about purchasing a rebuilt or used Quadrajet carburetor for a 1975 or 1976 Chevrolet or GMC vehicle:

1. Improved Fuel Economy: The Quadrajet carburetor offered improved fuel economy compared to the two-barrel carburetors commonly used at the time. This was achieved through its unique design, which included a throttle body with four barrels, each with its own individual venturi and fuel circuit.

2. Smooth Idle and Power: The Quadrajet carburetor provided a smoother idle and better power delivery compared to two-barrel carburetors. This was due to its ability to provide a more even fuel mixture, resulting in more consistent engine performance.

3. Fuel Efficiency: The Quadrajet carburetor was designed to be more fuel-efficient than other carburetors of the time. It achieved this by using a fuel pressure regulator to maintain a consistent fuel pressure, which helped to ensure that the correct amount of fuel was delivered to the engine at all times.

4. Easy Installation: The Quadrajet carburetor is relatively easy to install, making it a popular choice for DIY enthusiasts. The carburetor comes with all the necessary hardware and instructions, and the installation process is similar to that of a two-barrel carburetor.

1. Cost: The Quadrajet carburetor can be more expensive to purchase and rebuild compared to other carburetors of the time. This is due to its complex design and the specialized skills required to rebuild it.

2. Complex Design: The Quadrajet carburetor has a more complex design than other carburetors, which can make it more difficult to diagnose and repair. This is because it has more components that need to be adjusted and synchronized to ensure proper engine performance.

3. Fuel Economy Trade-Off: While the Quadrajet carburetor offered improved fuel economy compared to two-barrel carburetors, it was not as fuel-efficient as modern fuel injection systems. This can result in higher fuel costs over the long term.

4. Maintenance: The Quadrajet carburetor requires more maintenance than some other carburetors. This is due to its complex design and the need for regular adjustments to ensure proper engine performance.

The Rochester Quadrajet 4-barrel carburetor was a popular and effective option for 1975 and 1976 Chevrolet and GMC vehicles. Its smooth idle and power delivery, improved fuel economy, and easy installation make it a desirable choice for many enthusiasts. However, its cost, complex design, and maintenance requirements are important considerations to keep in mind. Ultimately, if you're looking for improved engine performance and are willing to invest in the necessary time and resources to maintain the carburetor, then a Quadrajet carburetor may be the right choice for you.

If you're considering purchasing a Quadrajet carburetor for your 1975 or 1976 Chevrolet or GMC vehicle, it's important to do your research and ensure that you're getting a high-quality rebuilt carburetor from a reputable supplier. Look for a supplier that has a good reputation and offers a warranty on their products. Additionally, be prepared for the ongoing maintenance requirements and the cost of rebuilding or replacing the carburetor over time. If you're not comfortable with the maintenance requirements or the cost, then you may want to consider other options, such as a modern fuel injection system or a more simple carburetor design.

Details:

Linkage moves free. Rochester Quadrajet 4-barrel carburetor, ID number 7045225 with date code 0936. Core for rebuilding or parts. Please verify part number and pics match your application.

See pics for condition. Carb core appears to be mostly complete.

part #: 7045225 prices

• $44.20-$49.50

specifications carbcoon:

• for makes: Chevrolet, Gmc, Rochester
• for years: 1975-1976
• brand: Rochester
• mpn: 7045225
• type: Chevy
• oe/oem part number: 350

payments carbcoon:

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shipping carbcoon:

• transit: 4-8 Days
• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• cost: $0.00

returns carbcoon:

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

seller carbcoon:

• # reviews: 32418
• rating: 100.0%
• city: Sheboygan Falls, Wisconsin

general carbcoon:

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

offer carbcoon:

• quantity: 1
• best offers: True
• started: December 18, 2025
• availability: In Stock
• sold: 0
• options: Ship-to-home

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