ROCHESTER 4GC348 Carburetor Carb 4-JET 4-BARREL V-8

( Brand: Rochester ), ( Manufacturer Part Number: 4GC348 ), ( Type: Carburetor ), ( Oe/oem Part Number: 1959 1960 )

Review ROCHESTER 4gc 4-barrel Carburetor Carb Chevy Chevrolet 348 V-8 fits IMPALA 1961

The Rochester 4GC348 4-jet 4-barrel carburetor is a legendary component of the 1961 Chevrolet Impala 348 V-8 engine. This carburetor, manufactured by the renowned Rochester Products Company, was a popular choice for muscle cars of the era due to its efficiency, power, and smooth operation.

The 4GC348 is a 4-barrel carburetor, meaning it has four separate barrels, each with its own intake manifold port and throttle butterfly. This design allows for a more even fuel-air mixture, resulting in improved combustion and increased horsepower. The carburetor's 4-jet design refers to the four fuel jets located at the base of each barrel, which atomize the fuel for optimal combustion.

The carburetor features a mechanical secondaries system, which means that it uses a mechanical linkage to open the secondary throttle valves at a specific engine RPM. This design provides a powerful response during acceleration, enhancing the driving experience. The secondary throttle valves, when opened, allow more fuel to enter the engine, increasing the power output.

The Rochester 4GC348 is also known for its simplicity and ease of tuning. It comes with a factory-set idle mixture screw and a primary jet kit that can be easily adjusted to accommodate various fuel and atmospheric conditions. The fuel bowl is vented, ensuring proper fuel level maintenance and preventing the formation of vacuum bubbles that can affect performance.

The carburetor's cast aluminum construction not only provides durability but also contributes to its distinctive appearance. The polished finish adds a touch of elegance to the engine bay of the 1961 Chevrolet Impala. The 4GC348 is a true work of automotive engineering, combining style, power, and efficiency in one package.

When it comes to maintaining or installing the Rochester 4GC348 4-jet 4-barrel carburetor, it is essential to follow the correct procedures and use the appropriate tools to ensure proper functioning. Proper installation and tuning can yield significant improvements in engine performance, making this carburetor an excellent investment for any classic Chevrolet Impala 348 V-8 enthusiast.

The Rochester 4GC348 4-jet carburetor is a popular choice for 1961 Chevrolet Impala 348 V-8 engines. Here are some pros and cons that may help in making a decision:

1. Improved fuel efficiency: The 4-jet design provides better fuel atomization, which can lead to improved fuel efficiency.

2. Smooth idling: The 4-jet carburetor offers smoother idling and better throttle response than a single or double-barrel carburetor.

3. Better power delivery: The 4-jet carburetor provides more consistent power delivery throughout the RPM range.

4. Easier tuning: The 4-jet design allows for easier tuning, as each jet can be adjusted individually.

5. Improved engine performance: The 4-jet carburetor can help improve engine performance, especially during acceleration.

1. Complexity: The 4-jet carburetor is more complex than a single or double-barrel carburetor, which can make it more difficult to install and maintain.

2. Cost: The 4-jet carburetor is generally more expensive than a single or double-barrel carburetor.

3. Fuel consumption: While the 4-jet carburetor can improve fuel efficiency, it can also lead to increased fuel consumption if not properly tuned.

4. Requires precise tuning: The 4-jet carburetor requires precise tuning to ensure optimal performance, which can be a challenge for some DIY enthusiasts.

In conclusion, the Rochester 4GC348 4-jet carburetor can provide significant improvements in fuel efficiency, power delivery, and engine performance for a 1961 Chevrolet Impala 348 V-8. However, its complexity, cost, and the need for precise tuning may be a drawback for some.

If you are looking for improved performance and are willing to invest time and resources into proper tuning, then the 4-jet carburetor may be a worthwhile investment. However, if you are looking for a simpler and more cost-effective solution, then a single or double-barrel carburetor may be a better choice. Ultimately, the decision depends on your specific needs and resources.

Details:

Rochester 4-Jet 4-barrel carburetor, no ID tag or stamp number. Carb core appears to be mostly complete. Please verify pics match your application. See pics for condition.

Core for rebuilding or parts. Linkage moves free.

part #: 4gc348 prices

• $100.00-$150.00

specifications carbcoon:

• for models: Impala
• for makes: Chevy, Chevrolet, Rochester
• for years: 1961
• brand: Rochester
• mpn: 4gc348
• type: Carburetor
• oe/oem part number: 1959 1960

offer carbcoon:

• best offers: True
• sold: 0
• started: December 17, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home

returns carbcoon:

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

seller carbcoon:

• rating: 100.0%
• # reviews: 32401
• city: Sheboygan Falls, Wisconsin

general carbcoon:

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

payments carbcoon:

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

shipping carbcoon:

• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS
• cost: $0.00
• transit: 9-9 Days

Rochester 4GC348 Is Similar To:

• Chevrolet 7040134 1970s Chevelle 2 Barrel Rochester 350 400 Jet Carburetor (32.3% similar) 1970 S Rochester 2 jet my catalog shows fit 1970 350 400 its complete not frozen will probably need a rebuild shipping is $15.00 message NE with questions...(May 16th, 2024)
• Rochester 7043208 3042 4bbl Quadrajet Carburetor Qc 3042 Parts Or Repair (42.2% similar) Buy it!, because, while you are trying to carve a few pennies off of the price, someone else comes in and buys it at full price. I will decline any offer that requires me to pay the shipping. I have not opened it up, so do know what parts are or not in. This is a Rochester quadrant 4BBL...(May 17th, 2024)
• Rochester Carter 7042206 1972 Chevy Gmc Truck 402 454 Carburetor Carb Quadrajet (39.8% similar) This is a chevy 402/454 q-jet carb 7042206 the stamped number. It moves freely and looks pretty good but may need rebuilding from sitting...(May 17th, 2024)
• Rochester 17058110 Gm 2bbl Carburetor For 1978 Buick Oldsmobile Pontiac Chevy (45.1% similar) It should be gone through and cleaned. Used Rochester carb 17058110 in good condition...(May 17th, 2024)
• Rochester 7025003 1963-1967 Chevy Intake Exhaust Manifold 6cyl 250 235 Impala Chevelle Belair Oem (38% similar) Original factory gm straight 6 intake and exhaust manifold. The intake is in good shape with no damage unfortunately the exhaust manifold cracked...(May 17th, 2024)
• Rochester C1539 1974 Corvette Chevy 454 M t Carburetor 7044201 Nov 1973 Date Code (43.8% similar) Heres a rare Rochester 4BBL carb made for the 1974 corvette 454 manual transmission #7044201. Needs to be cleaned and rebuilt...(May 17th, 2024)
• Rochester 17059216 1979 Corvette Q-jet Quadrajet Carburetor Carb Gm (48.1% similar) Heres a used Rochester jet carburetor that needs rebuild. See pictures...(May 17th, 2024)
• Rochester 7004497 Oem 1 Barrel Carburetor Chevy Gmc B-style Inline 6 Cyl Engine 216 235 (52.9% similar) Shafts are not stuck. Looks to be complete. 1940S, early 1950S Rochester 1BBL carburetor. No noticeable damage, cracks or repairs. For rebuild or parts...(May 17th, 2024)
• Rochester 7024046 2300 Used 2 Barrel 2-jet Carburetor R2-2gc 1964 Buick 7026534 (48.2% similar) It has been designed to meet the oe/oem specifications and is compatible with a range of engines. The barrel count is 2 and it a non-modified, non-performance part. The carburetor is in good working order and comes with a manufacturer part number of 7026534, 7024046 2300. It has a front...(May 17th, 2024)
• Rochester 7029104 2-barrel Carburetor 2gv 1969 Chevrolet Chevy 327 350 396 400 (59.4% similar) Rochester 2 bbl my catalog shows fits chevy model's 1969 327 350 396 400 missing the choke pull off rod not frozen selling as is $15.00 for shipping message me with any questions...(May 18th, 2024)
• Rochester 17082207 Q-jet Carburetor 305 350 Chevy 5.0 5.7 Olds (51% similar) It should be gone through and cleaned. Here is a used gm Rochester carb 17082207 from an 80S chevy 307 or 350 5.0 5.7 old's...(May 18th, 2024)