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The Differences Between Two Four Barrel Intake Manifolds

Multi-barrel intake manifolds can accommodate two- or four-barrel carburetors on older or performance engines. The intake manifolds job is to connect the carburetor to the intake ports on the engines cylinder heads. Intake manifolds can improve your vehicles performance and increase fuel mileage. It is fairly common for customized carburetor performance engines to feature an upgraded intake manifold designed to increase overall horsepower.

Increased Airflow

The four-barrel carburetor and corresponding four-barrel intake manifold allow increased fuel and air flow through the engine. You will commonly find four-barrel manifolds on large V8 engines that are intended for performance and power where the extra airflow can be turned into improved performance.

Fuel Economy

Four-barrel carburetors work by running the two primary barrels all of the time and only going into the secondary barrels when the driver signals the engine to provide additional power by pressing down hard on the accelerator. When the two secondary barrels open, more fuel and air flow through the intake manifolds and into the engine. Two-barrel carburetors do not have this option; theore they typically get better fuel economy than four-barrels due to the restricted fuel and air flow.

Improved Performance

The increased air and fuel flow from a four-barrel carburetor, in addition to the two extra secondary barrels, create increased horsepower and acceleration when you drive the vehicle. The vehicle receives more fuel, which it can burn to provide additional power when driven. Vehicles with a four-barrel carburetor and intake manifold will accelerate more rapidly and efficiently than a vehicle with a two-barrel carburetor and intake.

Posted by Unknown at 11:30 AM

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