fits model: 400, 440. make: Dodge, Chrysler. year: 1973–1977.

( Brand: Carter ), ( Manufacturer Part Number: 6321S ), ( Modified Item: No ), ( Placement On Vehicle: Front ), ( Type: Carburetor ), ( Features: Thermoquad ), ( Country/region Of Manufacture: United States )
The Carter 6321S Thermoquad Carburetor, model C4-TQ, is a high-performance carburetor specifically designed for Dodge and Chrysler vehicles from 1973 to 1977 equipped with 400 or 440 cubic inch engines. This Thermoquad carburetor is a significant upgrade from the original factory carburetors, offering improved fuel efficiency, throttle response, and overall engine performance.
The Carter 6321S Thermoquad Carburetor features a unique design that separates the air and fuel mixture before entering the combustion chamber. This separation process, known as "quenching," allows for a more efficient and complete fuel burn, resulting in more power and better fuel mileage. The Thermoquad design also includes an integrated temperature sensor, which allows for automatic fuel mixture adjustments based on engine temperature, further improving fuel efficiency and performance.
The 6321S Thermoquad Carburetor is equipped with a 750 CFM (Cubic Feet per Minute) venturi, making it suitable for high-performance applications. The carburetor features a vacuum secondary system, which provides additional fuel during hard acceleration, ensuring optimal power delivery. The vacuum secondary system is controlled by a throttle position sensor, which provides precise fuel delivery based on engine load and speed.
The Carter 6321S Thermoquad Carburetor is constructed from high-quality materials, including an aluminum housing and brass metering components, to ensure durability and longevity. The carburetor is easy to tune and adjust, with adjustable primary and secondary metering jets, an idle mixture screw, and an air bleed screw. The carburetor also includes a built-in fuel pressure regulator, which eliminates the need for an external regulator, further simplifying installation.
In conclusion, the Carter 6321S Thermoquad Carburetor, model C4-TQ, is a high-performance upgrade for Dodge and Chrysler vehicles with 400 or 440 cubic inch engines from 1973 to 1977. This carburetor offers improved fuel efficiency, throttle response, and power, thanks to its unique Thermoquad design and vacuum secondary system. The 6321S Thermoquad Carburetor is constructed from high-quality materials and is easy to tune and adjust, making it a popular choice among performance enthusiasts and restorers.
Pros of buying Carter 6321S Thermoquad Carburetor C4-TQ 6342S for 1973-1977 Dodge Chrysler 400/440:1. Improved Performance: The Thermoquad design provides better fuel mixture and air/fuel ratio, leading to improved engine performance and fuel efficiency.
2. Temperature Compensation: The Thermoquad carburetor has an integrated temperature sensor that adjusts the fuel mixture according to engine temperature, improving cold start and warm-up performance.
3. Easy Installation: The Carter 6321S Thermoquad carburetor is designed to fit straight in place of the stock Carter AFB carburetor, making installation easy and straightforward.
4. Fuel Economy: The Thermoquad design can improve fuel economy by providing a more precise fuel mixture, resulting in reduced fuel consumption.
Cons of buying Carter 6321S Thermoquad Carburetor C4-TQ 6342S for 1973-1977 Dodge Chrysler 400/440:1. Cost: The Thermoquad carburetor is more expensive than a stock carburetor, which can be a significant investment for some people.
2. Availability of Parts: While parts for the Thermoquad carburetor are available, they may not be as readily available or affordable as parts for a stock carburetor.
3. Familiarity: The Thermoquad carburetor may require some learning and adjustment to get used to, as it operates differently than a stock carburetor.
Conclusion:The Carter 6321S Thermoquad Carburetor C4-TQ 6342S can provide improved performance and fuel efficiency for 1973-1977 Dodge Chrysler 400/440 engines. However, the higher cost and potential difficulty in finding parts may be a deterrent for some people. If you are looking for better performance and fuel economy and are willing to make the investment, the Thermoquad carburetor can be a great choice.
Recommendation:If you are looking for better performance and fuel efficiency for your 1973-1977 Dodge Chrysler 400/440 engine, the Carter 6321S Thermoquad Carburetor C4-TQ 6342S can be a great option. However, make sure to do your research and weigh the pros and cons before making a decision. If you are unsure, it may be a good idea to consult with a professional mechanic to help you make an informed decision.
BUILD: 341 Warranty Information. PART NUMBER: 6321S / 6342S. SHIPPING PRICE BASED ON LOWER 48 USA ONLY.