ROCHESTER 17085508 Gm Quadrajet Carburetor 4BBL 4V

( Brand: Rochester ), ( Manufacturer Part Number: 17085508 ), ( Type: Carburetor ), ( Features: Quadrajet )

Review ROCHESTER Gm Quadrajet 4v Carburetor Gmc Chevrolet fits 305 350 1985–1986

The Rochester Quadrajet 4bbl 4V carburetor, model number 17085508, is a legendary automotive component that was first introduced in 1985 for use with General Motors (GM) V8 engines, specifically those with a displacement of 305 or 350 cubic inches. This particular carburetor is a quadrajet design, meaning it features four separate barrels arranged in a circular pattern, each with its own individual fuel jet. This configuration allows for improved fuel atomization and more efficient combustion, resulting in enhanced power and performance.

The 17085508 Quadrajet carburetor is a 4V (four-valve) design, indicating that it is intended for use with engines equipped with overhead valves. This design allows for better engine breathing, leading to increased power output and improved fuel economy. The carburetor is also equipped with a mechanical secondaries system, which provides additional fuel to the engine during high-load situations, such as hard acceleration or wide-open-throttle operation.

This carburetor features a number of advanced design elements that contribute to its superior performance and longevity. For example, it utilizes a vacuum secondary system, which uses engine vacuum to activate the secondary fuel metering circuits, ensuring smooth and responsive power delivery across the entire RPM range. It also features an automatic choke system, which simplifies starting in cold weather conditions.

The 17085508 Quadrajet carburetor is built using high-quality materials and precision manufacturing techniques to ensure long-lasting performance. It is constructed from durable cast aluminum, with stainless steel components used for critical wear areas such as the fuel bowls and floats. The carburetor also includes a number of serviceable features, such as adjustable idle mixture screws and main jet needles, allowing for easy tuning to optimize engine performance.

In conclusion, the Rochester Quadrajet 4bbl 4V carburetor, model number 17085508, is a high-performance, durable, and reliable component that is well-suited for use with GM V8 engines with displacements of 305 or 350 cubic inches. Its quadrajet design, mechanical secondaries system, and vacuum secondary system provide smooth and responsive power delivery, while its automatic choke system and serviceable features make it a favorite among enthusiasts and professional mechanics alike. Whether you're restoring a classic car or building a high-performance hot rod, the 17085508 Quadrajet carburetor is a must-have component that is sure to deliver the power and performance you're looking for.

Pros and Cons of Buying a Rochester 17085508 Quadrajet 4bbl 4V Carburetor for a 1985-1986 GMC/Chevrolet 305/350 Engine

The Rochester 17085508 Quadrajet 4bbl 4V carburetor is a popular choice for those restoring or upgrading the fuel delivery system of their 1985-1986 GMC and Chevrolet vehicles with the 305 and 350 cubic inch engines. This carburetor offers several advantages, but it also has some potential drawbacks. In this article, we will discuss both the pros and cons of investing in this specific carburetor model.

1. Improved Performance: The Quadrajet carburetor features a four-barrel design and a 4V secondaries configuration that enhances engine performance, providing better throttle response and improved fuel efficiency.

2. Easy Installation: The Rochester 17085508 Quadrajet carburetor is designed to be a direct replacement for the factory carburetor on 1985-1986 GMC and Chevrolet 305/350 engines, making installation relatively straightforward.

3. Durability: The Quadrajet carburetor is known for its robust construction and durability, making it a popular choice for high-performance applications and long-term use.

4. Availability: The Rochester Quadrajet carburetor is widely available, making it easy to find replacement parts and accessories.

5. Fuel Efficiency: The Quadrajet carburetor's design promotes efficient fuel delivery, which can lead to improved fuel economy.

1. Complexity: Compared to a single-barrel or two-barrel carburetor, a four-barrel Quadrajet carburetor is more complex, which can make tuning and adjustments more time-consuming and challenging for some users.

2. Cost: The Rochester 17085508 Quadrajet carburetor may be more expensive than some other carburetor options, especially when considering the cost of any necessary accessories or modifications.

3. Potential for Leaks: The Quadrajet carburetor has a reputation for being prone to leaks, particularly around the float bowls and gaskets. Regular maintenance and sealing is essential to prevent leaks.

4. Fuel Pressure Requirements: The Quadrajet carburetor requires a specific fuel pressure range to function properly, which may necessitate the installation of a fuel pressure regulator or other modifications.

The Rochester 17085508 Quadrajet 4bbl 4V carburetor offers several advantages for those looking to improve the performance and fuel efficiency of their 1985-1986 GMC or Chevrolet 305/350 engines. However, its complexity, cost, potential for leaks, and fuel pressure requirements are important considerations. Ultimately, the decision to invest in a Quadrajet carburetor depends on individual preferences, budget, and desired performance level. For those willing to put in the time and resources for tuning and maintenance, the potential rewards are significant.

If you are considering purchasing a Rochester 17085508 Quadrajet 4bbl 4V carburetor for your 1985-1986 GMC or Chevrolet 305/350 engine, be prepared for the added complexity and potential challenges that come with a four-barrel carburetor. Ensure you have a solid understanding of the tuning process and are willing to invest the time and resources necessary for maintenance. Additionally, consider the cost of the carburetor and any required accessories or modifications in your budget. If you are confident in your ability to handle these challenges and are looking for improved performance, the Quadrajet carburetor may be an excellent choice for your vehicle.

Details:

Its available AS-IS for parts or rebuilding. 17085508 3074 HMM, HMM. Used GM Rochester Quadrajet carburetor from a 1985 or 86 Chevrolet GMC, V8 AT Calif.It had been stored inside drawer in garage for several years.

part #: 17085508 prices

• $159.99-$170.84

specifications carbcoon:

• for models: 305, 350
• for makes: Gmc, Chevrolet, Rochester
• for years: 1985-1986
• brand: Rochester
• mpn: 17085508
• type: Carburetor
• features: Quadrajet

seller carbcoon:

• city: Ferndale, California
• # reviews: 1322
• rating: 100.0%

returns carbcoon:

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

general carbcoon:

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

payments carbcoon:

• credit card: Discover
• other
• wallet: Paypal

offer carbcoon:

• options: Ship-to-home
• started: February 27, 2025
• sold: 0
• availability: In Stock
• quantity: 1

shipping carbcoon:

• service: USPS Ground Advantage, USPS Priority Mail
• transit: 4-9 Days
• class: Standard, Expedited
• type: Calculated
• carrier: USPS
• cost: $32.15

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