Edelbrock keeps fuel delivery simple, yet highly effective with their new AVS2 Carburetor
In this modern world we live in, we’re used to technology changing at a rapid pace. Smart flat screen TVs, phones with facial recognition, and the sheer confusion of self-driving cars all seem to change from one day to the next. The performance and racing industry is no different making constant R&D, even on existing products, a necessity.
Edelbrock understands the need to stay on the lead lap and is constantly striving to keep their products up to date to meet the expectations of enthusiasts and racers. From their superchargers and cylinder heads to fuel injection systems and even their carburetors, there is constantly testing and design work to provide the best performance and endurance to their products.
One of their latest updates to a well proven design is on their Thunder AVS carburetors. The all new AVS2 series carb has received a number of upgrades that have improved the performance of the popular carburetor – while keeping the price affordable and right on par with the original model!
So what is new about the AVS2 carb from its proven predecessor? For starters, Edelbrock created all new tooling for the carb which is cast in their foundry in Sanford, North Carolina. You will quickly notice the details and clean appearance of the fresh housing right away. Another external update is an adjustable secondary valve. The adjustment allows you to set the rate at which the secondary air valve opens compared to the original weighted flap design that was pre-set. The benefit is the ability to match the transition to the secondaries preventing any flat spots when you roll from low rpm to wide open throttle.
A third, and the most significant upgrade, is in fuel delivery through the primary boosters. Rather than the typical ‘down leg’ booster that has been used for years, Edelbrock has updated to an annular discharge booster. This new design produces a larger spray pattern through the venture to improve the atomization of the fuel as it mixes with air before entering the intake manifold.
The new booster features eight equally spaced orifices which are fed from fuel circling around the entire booster. This design creates a spray pattern that is similar to that of a fuel injector which improves the atomization of the fuel droplets for improved emulsifying with the air. The results of this efficient mixture can improve the idle quality, reduce a flat spot or over rich condition and improve the throttle response. Overall, the fuel delivery is improved immensely over the original, albeit effective, design.
The Thunder AVS series carbs are available in 500, 650 and 800cfm as well as in a satin finish or Edelbrock’s exclusive Endurashine finish. An electric or manual choke are available as well.