fits model: Gto, 400, Prix, Firebird, Grand. make: Pontiac. year: 1970.

( Brand: Quadrajet ), ( Manufacturer Part Number: 7040564 ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Country/region Of Manufacture: United States ), ( Vintage Part: Yes )
Introducing the Quadrajet 7040564 carburetor, a classic automatic transmission carburetor engineered specifically for 1970 Pontiac GTO, Firebird, and other select applications requiring an ESS 400 system. This Quadrajet carburetor is a true automotive legend, recognized for its efficiency, power, and ease of installation in muscle cars.
The Quadrajet 7040564 sports a multi-throat design, featuring four separate main jets that optimize fuel delivery for superior engine performance. The primary jets are calibrated for smooth idle and optimal throat velocities, while secondary and tertiary jets work in harmony to ensure perfect throttle response and seamless power transitions in various driving conditions.
Each Quadrajet carburetor is meticulously produced using premium materials, ensuring corrosion resistance and longevity. The body is crafted from durable cast iron, providing excellent heat dissipation to maintain optimal engine performance. The Quadrajet also includes a fine-wire accelerator pump, precision metering rods, and carefully computed needle and jet heights, as well as an accurate idle mixture to grant your muscle car the power and pace it deserves.
One of the most notable advantages of the 7040564 Quadrajet carburetor for your 1970 Pontiac GTO, Firebird, or ESS 400 equipped vehicle is its easy installation. This carburetor incorporates factory-style factory mounting points and adapters, ensuring a direct, hassle-free replacement of your original equipment. The Quadrajet 7040564 comes with the appropriate base gaskets, restrictor plates, and mounting hardware, and retrains the use of your factory fuel line connections.
Choosing the Quadrajet 7040564 carburetor not only guarantees a successful muscle car restoration project, but also represents a remarkable investment in the long-term performance and driving satisfaction of your cherished vehicle. Embrace the legendary reputation of this iconic carburetor and take control of your automotive adventures with the power and precision of the Quadrajet 7040564 carburetor.
Quadrajet 7040564 Carburetor for 1970 Pontiac GTO, Firebird, and Prix (Q-Jet carburetor, ESS 400 Auto) is a popular choice among classic car enthusiasts for its impressive performance. However, like any automotive component, it comes with its advantages and disadvantages. Here are some pros and cons to help make an informed decision:
Pros:1. Superior Fuel Economy: The Quadrajet carburetor is known for its excellent fuel efficiency, which results in substantial savings on fuel costs over time.
2. Improved Power: Q-Jet carburetors offer improvement in power and torque compared to the original two-barrel carburetors, leading to enhanced driving experience.
3. Easier Idle Adjustment: This particular carburetor model features an Easy Start System (ESS), making idle adjustment simpler and more precise. Convenient for those who don't want to spend a lot of time fine-tuning their engines.
4. Smoother Idle: With good tuning, the Quadrajet carburetor can create a smoother idle than the stock carburetors, offering a more comfortable driving experience.
Cons:1. Complex Design: The Quadrajet carburetor has a more complex design compared to single or two-barrel carburetors. This means more parts to maintain and a higher potential for issues if not serviced regularly.
2. Mazda Fuel Pump Compatibility: The Quadrajet carburetor requires a specific fuel pump for perfect compatibility. Failure to use the right pump can result in mandatory fuel pump upgrades, adding to the initial cost.
3. Proper Tuning: Achieving optimal performance and fuel efficiency with a Quadrajet carburetor requires expert tuning, which might necessitate professional assistance and end up being a costly endeavor.
4. Limited Aftermarket Support: Finding replacement parts or accessories for this specific model can be more difficult than for other common carburetors due to its niche market.
Conclusion:The Quadrajet 7040564 carburetor for 1970 Pontiac GTO, Firebird, and Prix offers significant improvements in fuel efficiency, power, and idle stability. However, its complex design, compatibility issues with fuel pumps, and higher tuning demands may add to the initial investment and ongoing maintenance costs. Depending on your budget, technical expertise, and driving preferences, carefully weighing the pros and cons is vital for a successful and enjoyable project.
Recommendation:If you're looking for a significant boost in fuel economy, power, and overall performance, the Quadrajet carburetor might be worth considering. Be aware that it comes with some challenges, such as complex fuel pump compatibility, precise tuning, and potential difficulty in finding aftermarket parts. This carburetor is best suited for enthusiasts with a solid mechanical understanding and an appreciation for the process of optimizing their classic muscle cars. If you're uncertain about your ability to take on these challenges, it may be wise to explore other, more straightforward carburetor options.
This is a vintage Quadrajet carburetor for 1970 Pontiac GTO, Grand Prix, or Firebird with 400 CU IN 4-barrel engine. The OE/OEM part number is 7040564 with a build date of Oct 21 1969 and for all Pontiac that was sold in Calif. This is a used item but was rebuilt at one time and still has the tag on side. The fuel inlet has also been re sleeved.
It has a mechanical choke and is performance part.