CARTER 6452S Thermo Carburetor 4-BARREL A/t

( Brand: Carter ), ( Manufacturer Part Number: 6452S ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Oe/oem Part Number: 3698452 ), ( Items Included: Gasket ), ( Material: Aluminum ), ( Vintage Part: Yes )

Review CARTER Thermo quad 4-barrel Carburetor Mopar A/t fits QUAD 360 1974

The Carter Thermo-Quad 4-barrel carburetor, model number 6452S, is a high-performance fuel delivery system designed specifically for 1974 Mopar 360 automotive applications equipped with an automatic transmission. This quad-barrel carburetor is renowned for its ability to provide efficient fuel delivery, optimizing engine performance and power output.

The Carter 6452S Thermo-Quad carburetor is engineered with four separate barrels, each containing an individual venturi and fuel circuit. This design allows for a more precise fuel-air mixture, enhancing combustion efficiency and improving overall engine performance. Each barrel is equipped with an individual float bowl, ensuring consistent fuel delivery to the engine under various operating conditions.

One of the unique features of the Thermo-Quad 4-barrel carburetor is its integrated thermostat. This thermostat is designed to maintain optimal engine temperature by controlling the flow of coolant to the carburetor. By keeping the carburetor at the ideal temperature, the Thermo-Quad ensures stable fuel metering and consistent engine performance.

Another notable feature is the automatic choke system, which simplifies the starting process. The choke automatically engages when the engine is turned over, enriching the fuel mixture for easy starting. Once the engine reaches operating temperature, the choke disengages, allowing the engine to return to its normal fuel mixture.

The Carter 6452S Thermo-Quad 4-barrel carburetor is designed with a durable cast aluminum body, ensuring reliability and longevity. The carburetor is also equipped with a heavy-duty float system, high-performance jets, and needles to optimize fuel delivery for the 360 cubic inch engine. The Thermo-Quad carburetor is designed to work seamlessly with the automatic transmission, ensuring smooth power delivery and efficient fuel economy.

The installation of the Carter 6452S Thermo-Quad 4-barrel carburetor is relatively straightforward for experienced mechanics. However, it is recommended to consult the vehicle's service manual for specific installation instructions and requirements. The kit includes all necessary hardware for installation, including mounting brackets, gaskets, and hardware.

In summary, the Carter Thermo-Quad 4-barrel carburetor, model number 6452S, is a high-performance fuel delivery system designed specifically for 1974 Mopar 360 automotive applications equipped with an automatic transmission. Its unique features, such as the integrated thermostat and automatic choke system, make it an attractive option for enthusiasts looking to optimize their engine performance and power output. The durable cast aluminum body, heavy-duty float system, and high-performance jets and needles ensure reliability and longevity, making the Carter 6452S Thermo-Quad 4-barrel carburetor an excellent investment for any Mopar enthusiast.

The Carter Thermo-Quad 4-barrel carburetor, model 6452S, was a popular aftermarket carburetor used in various applications, including 1974 Mopar 360 automatic transmission vehicles. This carburetor offered several advantages and disadvantages.

1. Improved Engine Performance: The 4-barrel design allowed for better air-fuel mixture in the combustion chamber, leading to improved engine performance, especially in terms of power and torque.

2. Fuel Efficiency: The Carter Thermo-Quad design incorporated a secondary fuel metering system, which helped improve fuel efficiency by providing a richer fuel mixture during cold start-ups and a leaner mixture under normal operating conditions.

3. Smooth Idle: The carburetor's idle circuit was designed to provide a stable and smooth idle, improving overall drivability and reducing engine vibration.

4. Adaptability: This carburetor was adaptable to various engine sizes and configurations, making it a popular choice for enthusiasts looking to upgrade their Mopar's engine performance.

1. Complexity: The 4-barrel carburetor design is more complex than a single-barrel carburetor, which may result in higher installation and maintenance costs.

2. Cold Start Issues: The secondary fuel metering system, which is responsible for cold start improvements, could sometimes cause difficulties during warm-up, leading to rough idling or stalling.

3. Fuel Economy Concerns: While the carburetor may offer fuel efficiency improvements, the increased horsepower and torque could potentially lead to higher fuel consumption.

4. Tuning Requirements: The carburetor may require extensive tuning to achieve optimal performance, which could be time-consuming and costly for some enthusiasts.

The Carter Thermo-Quad 4-barrel carburetor, model 6452S, offers significant improvements in engine performance and fuel efficiency for 1974 Mopar 360 automatic transmission vehicles. However, it comes with its drawbacks, such as complexity, cold start issues, potential fuel economy concerns, and tuning requirements.

If you are an enthusiast looking for improved engine performance and are willing to invest time and resources into the installation, tuning, and maintenance of a 4-barrel carburetor, the Carter Thermo-Quad 6452S is an excellent choice. However, if you prioritize ease of use and affordability, a single-barrel carburetor or an electronic fuel injection system may be more suitable for your needs.

Details:

Throttle linkage, idle screws, and bowl vents operational. Rated 800 cfm ideal for emissions-era performance without sacrificing power. Vacuum ports for PCV, EGR, distributor advance. Untested post-removal sells as-is, NO WARRANTY.

Throttles move freely; floats drop/accelerator pumps squirt. Throttle body, air horn, base casting, internals. Accelerator pump stroke: 31/64. Key Specs for Rebuilds: Float level: 1-1/16.

Spread-bore design small primaries, large secondaries with aluminum/phenol air horn for reduced heat soak and precise metering. See pics: Multi-angle views incl. Electric choke assembly intact. Metering rods, jets, and step-up pistons present.

Shows honest patina light surface rust on castings, no major cracks/galling. Vintage Carter Thermo-Quad 6452S 4-Barrel Carburetor - 1974 Mopar 360 A/T: Original TQ model Chrysler list #3698452, casting #6452S on throttle body base. Perfect for classic Mopar rest-mod or hot rod swap.

part #: 6452s prices

• $78.00-$93.00

specifications carbcoon:

• for models: 360, Quad
• for makes: Mopar
• for years: 1974
• brand: Carter
• mpn: 6452s
• choke type: Mechanical
• type: Carburetor
• mounting flange type: Square Bore
• oe/oem part number: 3698452
• items included: Gasket
• material: Aluminum
• vintage part: Yes

shipping carbcoon:

• cost: $14.56
• class: Standard
• type: Calculated
• transit: 6-12 Days
• service: USPS Ground Advantage
• carrier: USPS

returns carbcoon:

• policy: No Returns

seller carbcoon:

• city: Athens, Alabama
• rating: 100.0%
• # reviews: 1

offer carbcoon:

• sold: 0
• started: February 15, 2026
• best offers: True
• availability: In Stock
• quantity: 1
• options: Ship-to-home

general carbcoon:

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

payments carbcoon:

• credit card: Discover
• other
• wallet: Paypal

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