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Choosing the right carburetor plays a major role in how a carbureted engine drives, responds, and produces power. Throttle response, fuel efficiency, cold starts, and overall reliability are all affected by carburetor design. Two of the most popular street focused carburetors from Edelbrock are the 1406 Performer and the 1906 AVS2.
Both are four barrel, electric choke carburetors built for street use, but they are designed with different performance goals in mind. This comparison breaks down the Edelbrock 1406 vs 1906 so you can confidently choose the best carburetor for your engine and driving style.
Design And Features: Edelbrock 1406 vs 1906
Edelbrock 1406 Performer
The Edelbrock 1406 is a 600 CFM carburetor designed primarily for reliable street performance and fuel efficiency. It features a lightweight aluminum body that resists heat soak and warping, making it a solid choice for daily driven vehicles and classic restorations.
Key features of the Edelbrock 1406 include:
• 600 CFM airflow rating
• Square bore flange
• Electric choke for easy cold starts
• Vacuum operated secondary system
• Metering rod fuel control system with no power valves
• Rear pivot floats and fuel bowls for consistent fuel delivery
The 1406 is calibrated out of the box for smooth idle, good drivability, and fuel economy. It works especially well on small block engines with mild camshafts and stock or lightly modified cylinder heads.
Edelbrock 1906 AVS2
The Edelbrock 1906 is part of the AVS2 Series and is rated at 650 CFM. It is aimed at enthusiasts who want better throttle response and increased airflow without stepping into a race oriented carburetor.
Notable features of the Edelbrock 1906 include:
• 650 CFM airflow rating
• Adjustable Valve Secondary system for tunable secondary opening
• Annular flow boosters for improved fuel atomization
• Eight evenly spaced discharge orifices per booster
• Electric choke
• Satin aluminum finish
The AVS2 design allows the secondary air valve opening rate to be adjusted externally. This gives tuners the ability to fine tune part throttle and wide open throttle behavior based on vehicle weight, gearing, and engine modifications.
Installation And Tuning Differences
Edelbrock 1406 Installation And Tuning
The 1406 is widely considered one of the easiest performance carburetors to install and tune. It bolts directly to most square bore intake manifolds and typically requires minimal adjustment after installation.
Tuning characteristics:
• Simple idle mixture and idle speed adjustments
• Vacuum secondaries that self regulate airflow
• Excellent drivability with minimal tuning knowledge
This makes the 1406 a popular option for first time carburetor upgrades and restorations.
Best suited for:
• Stock or lightly modified engines
• Daily driven vehicles
• Weekend cruisers
• Budget focused builds
Edelbrock 1906 Installation And Tuning
The 1906 requires a bit more attention during setup, but it rewards careful tuning with better throttle response and stronger mid range performance.
Tuning characteristics:
• Adjustable secondary air valve tension
• More precise fuel atomization
• Greater airflow potential
Because of these features, tuning should be done carefully and methodically, especially on engines with upgraded camshafts, intake manifolds, or cylinder heads.
Best suited for:
• Mild to moderate performance builds
• Classic muscle cars with engine upgrades
• Enthusiasts comfortable with carb tuning
Performance Comparison At A Glance
While both carburetors perform well on the street, their behavior differs.
The 1406 prioritizes smoothness, fuel efficiency, and simplicity. It delivers predictable throttle response and stable idle, even with minimal tuning.
The 1906 delivers sharper throttle response and supports higher airflow demands. The annular boosters improve fuel distribution, which helps reduce hesitation and improves acceleration.
Cost And Value Comparison
Pricing for both carburetors is competitive within their segment.
The Edelbrock 1406 is typically more affordable and offers excellent value for drivers who want reliable performance without extra complexity.
The Edelbrock 1906 usually costs slightly more, but the added airflow capacity, adjustable secondaries, and improved boosters justify the price for performance-oriented builds.
How To Choose Between The Edelbrock 1406 And 1906
Choose the Edelbrock 1406 if:
• Your engine is mostly stock or lightly modified
• You value simplicity and easy tuning
• Fuel efficiency and drivability are top priorities
• You want a proven street carburetor
Choose the Edelbrock 1906 if:
• Your engine has performance upgrades
• You want quicker throttle response
• Your build demands higher airflow
• You prefer more tuning control
Supporting Parts To Consider
Regardless of which carburetor you choose, performance improves when supporting components are matched correctly.
Consider upgrading:
• Air cleaner and high flow air filter
• Fuel pressure regulator set between five and six psi
• Carburetor spacer for certain performance applications
• Proper throttle linkage and return springs
JEGS carries all the supporting components needed to complete your carburetor installation properly.
Shop Edelbrock 1406 And 1906 Carburetors At JEGS
Both the Edelbrock 1406 and 1906 deliver proven performance and reliability. The right choice depends on your engine combination and performance goals.
At www.jegs.com, you will find Edelbrock carburetors, tuning kits, gaskets, fuel system components, and expert tech support to help you get the most from your build. With fast shipping and a knowledgeable team, JEGS makes upgrading your fuel system simple and confidence inspiring.
If you need help selecting or tuning your carburetor, call 1-800-345-4545 and speak with a JEGS expert who understands performance.
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