Thunder Series AVS 500 CFM Carburetor with Electric Choke

Name: Thunder Series AVS 500 CFM Carburetor with Electric Choke
Brand: EDELBROCK
SKU: 350-1803
Price: 442.99 USD
Availability: OutOfStock

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

500 CFM Carburetors

500 cfm
Electric Choke
Non-EGR
Dual Quad Calibration
Satin Finish

CALIBRATED FOR Dual Quads
Edelbrock 500 CFM carbs recommended for small cubic-inch Performer (such as 305 c.i.d and smaller Chevrolet; 302 c.i.d. and smaller Ford) and dual-quad applications C-26, F-28 and Street Tunnel Ram applications. Calibrated for performance rather than mileage. Includes both timed and full vacuum ports for ignition advance.
Notes:
Metering Jets: Primary .086 , Secondary .077
Metering Rods: .065 x .057
Step-Up Spring: Orange 5' Hg
For dual quads, one manual choke and one electric choke should be purchased together.

Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.

The Best "Street Performance" Carburetor

Edelbrock engineers have made a great carburetor even better. The new and exciting Thunder Series AVS carbs are designed and calibrated to deliver optimum street performance in hundreds of applications--they are undeniably the most innovative and dependable street performance carburetors available today. AVS stands for Adjustable Valve Secondary, which means just that--you have the ability to adjust the secondaries with simple tools (no springs required).
You can use a late opening for heavy vehicles with higher gears or an early opening for light vehicles with lower gears. For unmatched street performance, combine these carburetors with Edelbrock Performer, Performer Air-Gap, Performer EPS, Performer RPM, RPM Air-Gap, or Torker II manifold and camshaft combinations.

Thunder Series AVS Carburetors:

All the same advantages of the Edelbrock Performer Series, such as factory-set float levels for infrequent adjustments, 2-step metering rods for independent tuning of cruise and power circuits, and the ability to change jets, adjust floats, or replace needles without draining fuel
Qwik-Tune secondary air valve
A sturdy 2-piece body with no power valves to blow and no gasket below the fuel level for leak-free operation
CNC-machined and profiled front face delivers a smooth, custom look
Satin or Endurashine finish
Spring-loaded needles and seats for consistent fuel supply over rough terrain and side-mounted fuel chambers that are less likely to flood when a vehicle climbs hills (ideal for off-roading and the 4x4 environment)
Optional single or dual inlet for total fuel plumbing flexibility
Available in 500, 650, and 800cfm with either manual or electric choke
Manual AVS carbs cannot be converted to electric choke
Installation and Tuning DVD included.

These kits, put together by JEGS Professionals, include Edelbrock Thunder Series AVS Carburetor, Edelbrock Carburetor Dual Feed Fuel Line Kit,JEGS Carburetor Stud Kit and JEGS 14'' Performance Chrome Air Cleaner

Edelbrock Carburetor

Application Guide

Edelbrock Thunder Series AVS Carburetors deliver a refined street performance experience with groundbreaking adjustability and smooth throttle response. The AVS ("Adjustable Valve Secondary") design allows users to fine-tune secondary opening timing with simple tools—no springs required—so you can dial it in for heavy vehicles or lighter builds with ease.

At the heart of the Thunder Series are the same advantages found in Edelbrock’s Performer lineup: factory-set float levels for minimal maintenance, two-step metering rods for independent tuning of cruise and power circuits, and the ability to service jets, floats, and needles without draining fuel or removing the carburetor. Their two-piece body design features no gaskets below the fuel bowl level—significantly reducing the risk of leaks.

Additional premium touches include a CNC-machined front face for a sleek, custom look and spring-loaded needles and seats for reliable fuel supply in off-road or rough-terrain environments—perfect for 4x4 and performance builds. Available in 500, 650, and 800 CFM variants with both manual and electric choke configurations, these carburetors are as versatile as they are high-performing.

Whether you're upgrading for enhanced driveability, cleaner aesthetics, or off-road endurance, the 650 carburetor edelbrock option offers a balanced profile for most street and weekend-driving applications. The edelbrock thunder series carburetor blends innovation with practicality—making tuning and maintenance a breeze. As a whole, the edelbrock thunder series represents the ultimate street-ready carb upgrade: adjustable, reliable, and engineered for performance.

With improved throttle feel, minimal upkeep, and dependable construction, the Thunder Series AVS is a smart, long-term investment for anyone looking to elevate their ride.

Part TypeCarburetor

Product LineEdelbrock Thunder Series AVS Carburetors

BrandEDELBROCK

Package Height6.6

Package Width7.7

Package Length13.4

Weight8.55 PG

Part CategoryPerformance Parts

UsageStreet/Hi-Performance

FlangeSquare Bore

ChokeElectrical

EmissionWithout EGR