Webcon Weber Performance Carburettor Kit – Mercedes 220 (4 Cylinder, 1968-1973)

This Webcon Weber Performance Carburettor Kit offers a comprehensive upgrade for the standard carburettor system fitted to the Mercedes 220 with its four-cylinder engine, manufactured between 1968 and 1973. Designed as a direct replacement, this kit prioritises enhanced airflow and optimised fuel delivery to improve overall engine characteristics.

The core principle behind this upgrade lies in increasing the engine’s volumetric efficiency – its ability to draw air into the cylinders. The Weber carburettor, coupled with a specifically designed inlet manifold, facilitates this process through larger throttle bores and refined fuel atomisation. This results in a more responsive engine across the rev range.

Key Components & Functionality

• Weber Carburettor Design: The supplied Weber carburettor features enlarged throttle bores compared to original equipment. This allows for greater air intake, crucial for increased power output. The internal design focuses on precise fuel metering, ensuring an optimal air-fuel ratio for efficient combustion.
• Matched Inlet Manifold: This kit includes a dedicated inlet manifold engineered specifically for the Mercedes 220’s four-cylinder engine. The manifold is designed to ensure correct alignment with both the cylinder head and the Weber carburettor, maximising airflow path efficiency and promoting balanced fuel distribution across all cylinders. This balance is vital for consistent performance and minimising combustion instability.
• Throttle Linkage Assembly: A pre-engineered throttle linkage assembly is included within the kit. This component provides a direct connection between the accelerator pedal and the Weber carburettor’s throttle plates, ensuring smooth and predictable throttle response. The design prioritises ease of installation and reliable operation.
• Vehicle-Specific Jetting: The supplied Weber carburettor is pre-jetted to suit a standard, unmodified Mercedes 220 engine. This provides a functional baseline setup allowing for immediate improvements in driveability following installation. However, it's important to note that optimal performance will be achieved through subsequent dyno tuning (see ‘Important Considerations’ below).
• Comprehensive Hardware: To simplify the installation process and ensure a secure fit, this kit includes all necessary mounting hardware. This comprises gaskets – critical for leak prevention – studs, nuts, bolts, and brackets specifically designed for this application.
• Air Filtration (Kit Dependent): Certain kits within this range include compatible air filters. These filters are selected to provide adequate airflow while protecting the engine from particulate matter, contributing to long-term reliability. Check individual kit specifications to confirm filter inclusion.

The combined effect of these components is a noticeable improvement in engine breathing and fuelling capacity. This upgrade proves particularly beneficial when paired with other performance modifications such as high-lift camshafts or free-flowing exhaust systems, allowing the engine to fully realise their potential.

Benefits of Improved Airflow & Fuel Delivery

Increasing airflow into the engine allows for a greater volume of air/fuel mixture to be drawn in during each intake stroke. This directly translates to increased power output and improved throttle response. The precise fuel metering characteristics of the Weber carburettor ensure that the correct ratio of fuel is delivered, optimising combustion efficiency and minimising wasted fuel.

Furthermore, a well-tuned Weber conversion can enhance overall drivability by providing smoother acceleration, reduced hesitation, and improved engine flexibility. This results in a more enjoyable and responsive driving experience.

Important Considerations

While the supplied carburettor is pre-jetted for standard engines, it's strongly recommended that a professional dyno tune be performed following installation. A dyno tune allows an experienced technician to precisely adjust the jetting and other settings to optimise performance for your specific engine configuration, driving style, and local fuel quality.

Incorrectly jetted carburettors can lead to issues such as poor fuel economy, excessive smoke, or even engine damage. Professional tuning ensures that the engine operates safely and efficiently while delivering maximum power and driveability.

This kit is designed for enthusiasts who understand the principles of engine tuning and are prepared to invest in professional setup if required. It's a robust solution for those seeking to enhance the performance and character of their classic Mercedes 220.