fits model: Firebird. make: Rochester. year: 1978.

( Manufacturer Part Number: 17058263 ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Mounting Flange Type: Spread Bore ), ( Features: Quadrajet )
The Rochester Quadrajet carburetor, model number 17058263, is a renowned fuel delivery system that was originally designed for the 1978 Firebird Trans Am L-72 vehicles. This exquisitely engineered carburetor is a vital component for maintaining the powerful performance and iconic characteristics of this legendary muscle car. In this detailed product description, we will delve into its intricacies, distinctive features, and applications.
Design and Build:The Rochester Quadrajet carburetor, specifically model 17058263, is a sophisticated fuel-injection alternative, designed using advanced quad-barrel technology. This carburetor is characterized by its large, rectangular air horn, which houses four individual barrels configured in a cross flow pattern. Each barrel is responsible for providing fuel to specific cylinders, ensuring optimal engine efficiency and potent emissions.
Performance Enhancements:One of the key features of the Rochester Quadrajets is their unique automatic choke system. This ingenious design uses an electrically heated element to warm the carburetor's primary metering rods. Consequently, when the vehicle is started, the engine receives a rich fuel mixture for a smoother start-up process. Additionally, the carburetor comes equipped with an integrated vacuum secondary circuit, which guarantees seamless cruise control and powerful acceleration.
Applications:The Rochester Quadrajet carburetor, 17058263, was initially designed to meet the fueling needs of the 1978 Firebird Trans Am L-72 engines. The L-72 engine package was a performance-oriented upgrade prepared specifically for the most potent Firebird models. Combined with the Quadrajet carburetor, the engine delivered a formidable 350 horsepowers. However, due to its versatility, this Rochester Quadrajet carburetor can be used on other makes and models of vehicles with a similar engine configuration.
Maintenance and Compatibility:This Rochester Quadrajet carburetor is compatible with a wide range of fuel systems, including those utilizing gasoline and methanol. Periodic maintenance, such as cleaning the throttle bodies and adjusting idle mixture screws, is essential to maintain peak performance. It's paramount to note that the installation process can be technically demanding and may require professional mechanical expertise.
Conclusion:The 1978 Rochester Quadrajets model 17058263 is a testament to the ingenuity and engineering prowess of the past. This relic of automotive history continues to captivate gearheads and muscle car enthusiasts with its distinctive design, powerful performance, and unrivaled legacy. Whether you're restoring a cherished classic or pursuing an exotic project build, this quad-barreled wonder is an essential component that breathes life into the unforgettable experience that only a true muscle car can deliver.
**Background:** The 1978 Firebird Trans Am L-72 with the Rochester 17058263 Quadrajet carburetor is a classic muscle car sought after by enthusiasts. Let's evaluate its advantages and disadvantages.
**Pros:**1. **Power:** The L-72 engine, with its 400 cubic inch V8 engine and quadrajet carburetor, delivers an impressive amount of power. This muscle car can reach up to 200 horsepower, providing a thrilling driving experience.
2. **Rare and Valuable:** The 1978 Trans Am L-72 is relatively rare compared to other models. This scarcity adds to its value both on the market and among collectors, making it an excellent investment for those interested in classic cars.
3. **Strong aftermarket support:** Due to its popularity, the 1978 Trans Am L-72 has a rich and supportive aftermarket. Numerous parts and upgrades are available to customize or maintain your car.
4. **Iconic Design:** The Trans Am's sleek and timeless design, popularized by the "Smokey and the Bandit" franchise, has become an enduring symbol of the muscle car era. Having this iconic vehicle in your collection is undeniably satisfying.
**Cons:**1. **Fuel Efficiency:** Being a high-performance muscle car, it's no secret that the Quadrajet carburetor 1978 Trans Am L-72 doesn't boast impressive fuel efficiency. With its V8 engine, drivers should expect heavier fuel consumption.
2. **Maintenance:** The Quadrajet carburetor, while powerful, can be quite complex to tune and maintain. Regular upkeep is crucial to ensure optimal performance and avoid potential issues.
3. **Emissions issues:** Given its age, the 1978 Trans Am L-72 may not meet modern emissions standards. In some areas, this may limit your ability to register or drive the vehicle, requiring costly modifications.
4. **Repairs and parts costs:** Due to its classic status and finite production numbers, some parts for the 1978 Trans Am L-72 can be quite expensive. However, given the collectability and rarity of the vehicle, this may be a worthwhile expense for enthusiasts.
**Conclusion:** In conclusion, purchasing a 1978 Firebird Trans Am L-72 with a Quadrajet carburetor comes with both advantages and disadvantages. It offers a powerful engine, rarity, strong aftermarket support, and iconic design. However, it also presents challenges such as fuel inefficiency, complex maintenance, emissions issues, and costly repairs. Ultimately, if you're an avid muscle car enthusiast with a decent budget and a willingness to invest time and resources in maintenance, this vehicle can be a rewarding addition to your collection. For a casual driver or those more concerned with fuel efficiency, their interests may be better served by considering a different vehicle.
Does not include the fuel inlet fitting. I try to ship items as soon can but don't go town everyday. Sold as a core needing rebuild, price reflects the difference between repair or not. Hard to find carb in any condition.
Original 4 barrel Rochester Quadrajet #17058263 from a 1978 Trans Am with an L72 400 CID engine speed transmission.