CARTER 6139SA Thermoquad Carburetor Holley

( Brand: Carter ), ( Manufacturer Part Number: 6139SA ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Mounting Flange Type: Spread Bore ), ( Items Included: Gasket ), ( Features: Quadrajet, Thermoquad ), ( Universal Fitment: No ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review CARTER Mopar Thermoquad Carburetor Bbl Holley Rebuilt fits 340 1972–1973

The Carter ThermoQuad 6139SA carburetor, a classic design from the 1972-73 Mopar 340 engine, is a must-have for automotive enthusiasts and restorers seeking an authentic and high-performing replacement or upgrade for their vintage vehicles. This quad-barrel carburetor, manufactured by Holley under license from Carter, is a faithful reproduction of the original Carter ThermoQuad design, ensuring both functional accuracy and the distinctive aesthetic appeal of this iconic carburetor.

The Carter 6139SA ThermoQuad carburetor features four 2-gallon venturi barrels, each with its own individual metering rod and jet, allowing for precise fuel metering and optimal engine performance. The design includes a built-in electric choke control, common in Mopar applications during this era, providing a seamless starting experience.

One of the standout features of this carburetor is the integrated thermostat-controlled vacuum secondary system. This system utilizes four additional vacuum secondaries, which are enclosed within the primary venturis, to provide additional fuel during wide-open throttle conditions for enhanced power and torque. The ThermoQuad design optimizes the secondary fuel mixture by utilizing the engine coolant temperature as a trigger, ensuring optimal fuel mixture and efficient combustion.

The Carter 6139SA ThermoQuad carburetor comes with a number of modern improvements to make installation and tuning more accessible for today's automotive enthusiasts. These improvements include Holley's proprietary vacuum secondaries, which are easier to tune than the original Carter designs. The carburetor also includes an electric choke option, providing a more reliable starting experience compared to the original mechanical design.

The ThermoQuad 6139SA carburetor is constructed from high-quality materials, featuring a durable cast aluminum base and barrels. The carburetor is also equipped with a billet aluminum fuel bowl gasket and anodized aluminum linkage brackets for added durability and longevity.

The Carter 6139SA ThermoQuad carburetor is an excellent choice for those seeking to restore or enhance their vintage Mopar 340 engine. Its authentic design, modern improvements, and high-performance capabilities make it an invaluable addition for enthusiasts looking to bring their classic vehicles back to life.

Pros and Cons of Buying a Carter 6139SA 1972-73 Mopar 340 Thermoquad Carburetor by Holley

The Carter 6139SA Thermoquad carburetor, produced by Holley, is a popular choice among Mopar enthusiasts for their 340 cubic inch engines. Let's examine the merits and drawbacks of investing in this carburetor.

1. Thermoquad Design: The Thermoquad design is an advanced feature that allows the carburetor to maintain ideal fuel mixture temperatures, ensuring optimal combustion and performance.

2. Fuel Efficiency: The Carter 6139SA carburetor is known to improve fuel efficiency compared to some other carburetors, leading to cost savings in the long run.

3. Power Delivery: Holley's Thermoquad carburetor provides smooth, consistent power delivery across the entire RPM range.

4. Customization: Holley offers a range of optional features and accessories, allowing buyers to customize their carburetor to better suit their specific engine setup and driving preferences.

5. Reputation: Holley is a well-established and trusted brand in the automotive performance industry, giving buyers confidence in the product's quality and reliability.

1. Complexity: The Thermoquad design is more complex than traditional carburetors, which could result in a longer installation process and potential for more complications.

2. Cost: The Carter 6139SA Thermoquad carburetor is priced higher than some other carburetors on the market, which could be a barrier to entry for some budget-conscious buyers.

3. Requires Precision Tuning: Properly tuning a Thermoquad carburetor requires a high level of expertise and precision, which may necessitate the assistance of a professional tuner or extensive DIY research.

4. Potential for Fuel Leaks: As with any carburetor, there is a risk of fuel leaks, which could lead to messy cleanups and potential damage to the vehicle.

The Carter 6139SA Thermoquad carburetor from Holley offers numerous benefits, including advanced temperature control, improved fuel efficiency, and smooth power delivery. However, its complexity, cost, and the need for precise tuning could be potential drawbacks for some buyers. Ultimately, the decision to invest in this carburetor depends on an individual's budget, technical expertise, and desired performance enhancements for their Mopar 340 engine.

For those seeking top-level performance and advanced temperature control for their Mopar 340 engine, the Carter 6139SA Thermoquad carburetor from Holley is an excellent choice. However, for those with limited budgets or less experience with carburetor tuning, a more traditional carburetor may be a more suitable and cost-effective option.

Details:

It has been in old stock for over 20 years. Lots of applications possible. Excellent looking carb. Original box.

Garage Classics is proud to offer you an original Holley Remanufactured Thermoquad carburetor, Carter # 6139SA, Made in USA, 4 bbl, Carburetor was remanufactured by. Fits 1972 73 MOPAR 340 A, B, E Body.

part #: 6139sa prices

• $64.99-$189.99

specifications carbcoon:

• for models: 340
• for makes: Mopar
• for years: 1972-1973
• brand: Carter
• mpn: 6139sa
• choke type: Mechanical
• type: Carburetor
• mounting flange type: Spread Bore
• items included: Gasket
• features: Quadrajet, Thermoquad
• universal fitment: No
• vintage part: Yes
• country of origin: United States

payments carbcoon:

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

returns carbcoon:

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

shipping carbcoon:

• carrier: UPS
• service: UPS Ground
• type: Fixed
• class: Standard
• cost: $25.00
• transit: 2-6 Days

general carbcoon:

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

seller carbcoon:

• # reviews: 31495
• rating: 99.9%
• city: Menifee, California

offer carbcoon:

• best offers: True
• started: December 10, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

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