fits model: Xc, Ho, 455. make: Pontiac, Rochester. year: 1971.

( Brand: Rochester ), ( Manufacturer Part Number: 7041268 ), ( Type: Firebird Gto )
The Rochester Quadrajet 4-Barrel Carburetor XC is a legendary engine component for the 1971 Pontiac Trans Am 455 HO (Horizontal Optimizer). Known for its superior performance and reliability, this carburetor is a must-have for any Pontiac enthusiast looking to enhance the engine response and power output of their cherished muscle car. This detailed product description offers a comprehensive understanding of the features, benefits, and installation process of this iconic carburetor.
Design and Functionality:The Rochester Quadrajet 4-Barrel Carburetor XC is a fuel delivery system that utilizes four individual throttle bodies supported by a common intake manifold. This unique design grants enhanced fuel metering capability, improved idle quality, and superior street performance. By separating the fuel metering functions for each intake port, the Quadrajet ensures an optimized fuel-air mixture without requiring complex and often less effective emissions equipment.
Key Features:1. Quadrajet design with four separate and streamlined throttle bodies: This design optimizes fuel metering for each cylinder, improving engine response and power output.
2. Electric choke: The carburetor includes an electric choke system, ensuring easy starting and efficient cold weather operation.
3. Built-in fuel pressure regulator: The XC Quadrajet includes an integrated fuel pressure regulator, simplifying the installation process and eliminating the need for external fuel regulators.
4. Secondary fuel pump: The carburetor features a secondary fuel pump that feeds the accelerator pump, ensuring a precise fuel mixture during rapid acceleration.
5. Quiet-flow air horns: These unique air horns reduce intake noise while still maintaining sufficient air flow to the engine.
Performance and Benefits: The Rochester Quadrajet 4-Barrel Carburetor XC delivers numerous benefits for 1971 Pontiac Trans Am 455 HO engines. These include:1. Improved fuel efficiency: By optimizing the fuel metering process, the Quadrajet carburetor ensures that engines receive only the required amount of fuel, improving overall fuel efficiency without sacrificing performance.
2. Enhanced engine power: The precise fuel-air mixture provided by the Quadrajet results in more power and torque, delivering a responsive and thrilling driving experience.
3. Consistent idle quality: The electric choke system ensures reliable cold start performance, while the secondary fuel pump and precise fuel delivery lead to a consistent idle speed.
4. Superior driveability: The Quadrajet carburetor offers smooth acceleration and excellent throttle response, allowing drivers to exploit the full potential of their 1971 Pontiac Trans Am 455 HO.
5. Easier installation: The Quadrajet XC comes with an integrated fuel pressure regulator and an electric choke, streamlining the installation process and reducing the need for external components.
Conclusion:The Rochester Quadrajet 4-Barrel Carburetor XC is an essential upgrade for any 1971 Pontiac Trans Am 455 HO enthusiast. This carburetor offers improved performance, fuel efficiency, and drivability, all while simplifying the installation process through integrated components and streamlined design. For those desiring a thrilling muscle car experience, the Quadrajet XC delivers power, responsiveness, and efficiency rarely found in fuel delivery systems of its era.
The Rochester Quadrajet 4-Barrel Carburetor (RQ) was a popular upgrade for Muscle Cars like the 1971 Pontiac Trans Am 455 HO for both performance and reliability improvements. When considering an RQ upgrade, it's important to weigh the pros and cons.
Pros:1. Improved Power and Torque: The RQ Carburetor offers a significant increase in power, especially at low and mid-range RPMs, thanks to its larger venturi size and increased fuel flow rate.
2. Better Fuel Economy: Compared to the original carburetor, the RQ Carburetor can provide better fuel economy due to more efficient fuel delivery.
3. Smoother Idle and Driveability: The RQ carburetor offers a smoother idle and improved throttle response, resulting in a more enjoyable driving experience.
4. Improved Emissions: The Quadrajet design allows for better idle stability and improved emission control compared to stock carburetors.
5. Aftermarket Support: There is an abundance of support, parts, and modifications available for the RQ Carburetor, allowing for a wide range of tuning options.
Cons:1. Complexity: Compared to the stock carburetor, the RQ Carburetor is more complex to install and adjust. This may require additional time, effort, and expertise.
2. Cost: The RQ Carburetor and supporting parts can be expensive, especially for those seeking high-performance parts or exotic fuels like race gas.
3. Heat Sensitivity: Quadjet carburetors can be sensitive to extreme engine heat, which can affect fuel flow and idle stability. Proper cooling and insulation may be required.
4. Fitting issues: Some engine bays or intake manifolds may not accommodate the taller Quadjet carburetor without modifications.
5. Fuel Pressure: The RQ Carburetor requires a minimum fuel pressure of 5 psi for proper operation. Meeting this requirement may require an upgraded fuel pump or modifying the existing system.
Conclusion:Installing a Rochester Quadjet 4-Barrel Carburetor on a 1971 Pontiac Trans Am 455 HO can provide significant improvements in power, fuel economy, and driving experience, but these benefits come with a cost and the complexity of the installation process. Weighing the pros and cons, if you are willing to invest the time, money, and expertise, the RQ Carburetor upgrade can be a worthwhile enhancement to your vehicle.
Recommendation: Prior to installing the RQ Carburetor, consider the following recommendations:1. Consider your budget and assess the resources available to you for the installation process.
2. Research both the Quadjet carburetor and the supporting parts available on the market.
3. Ensure that your engine bay and intake manifold can accommodate the Quadjet carburetor without modifications.
4. Consult professionals or experts to assist with the installation process and provide any necessary guidance.
5. Prepare for the complexity of the installation process by investing in the proper tools and resources.
See pics for condition. Rochester Quadrajet 4-barrel carburetor, ID number 7041268 XC with date code 2150. Core for rebuilding or parts. Please verify part number and pics match your application.
Air Horn has a small nick in choke tower. Linkage moves free. Carb core has been partially taken apart and is missing pieces.