Dual Carburetor Hex Bar Linkage Kit for 34 EPC and ICT Carburetors
Achieve precision throttle response and perfect synchronization with the Hex Bar Dual Carb Linkage Kit from Appletree Auto. Specially engineered for use with EMPI 34 EPC and Weber ICT carburetor sets, this hex bar style linkage offers superior stability and adjustability compared to traditional twist-style linkages. By utilizing a rigid hex bar, this kit eliminates the \"flex\" often found in cheaper alternatives, ensuring that both carburetors open and close at the exact same time for a smoother idle and consistent power delivery across the RPM range.
This heavy-duty kit features aircraft-quality rod ends and adjustable down-rods to fine-tune your throttle geometry. The crossbar is supported by sturdy, intake-mounted brackets that provide a solid foundation, even under the high vibrations of an air-cooled engine. Whether you are running a daily driver Beetle or a high-performance Sand Rail, this linkage kit provides the mechanical reliability and \"set-it-and-forget-it\" durability that Appletree Auto customers demand for their vintage Volkswagen projects.
Product Fitment & Compatibility
This linkage kit is designed for Volkswagen Type 1 based air-cooled engines (1200cc - 1600cc+) equipped with dual 34 EPC or Weber ICT carburetors. It is compatible with most standard-width engine configurations.
- Volkswagen Beetle (Standard): 1954 - 1977
- Volkswagen Super Beetle: 1971 - 1979
- Volkswagen Karmann Ghia: 1956 - 1974
- Volkswagen Bus / Transporter (Type 2): 1955 - 1971 (Single Port & Dual Port)
- Volkswagen Thing (Type 181): 1973 - 1974
- Custom Sand Rails & Dune Buggies: All Years (Type 1 based engines)
Tech Tips & Installation Advice
- Check for Binding: After installation, move the linkage through its full range of motion by hand. Ensure the hex bar or down-rods do not make contact with the fan shroud, fuel lines, or spark plug wires. Any binding can lead to a stuck throttle or erratic idle.
- Synchronizing the Carbs: Use a high-quality airflow meter (Snail Type) to measure the intake pull at each carburetor. Adjust the threaded down-rods until the airflow is identical on both sides at idle and again at roughly 2,000 RPM.
- Wide Open Throttle (WOT): Have an assistant floor the gas pedal while you check the carburetors. Both butterflies should hit their stops at the exact same time the pedal hits the floor. If they don\'t, adjust the cable pull or the linkage arm position.
- Lubrication: Apply a drop of light machine oil or a small dab of dry graphite lubricant to the heim joints (rod ends) periodically. This keeps the movement smooth and prevents premature wear on the joints in dusty off-road environments.
- Hex Bar Centering: Ensure the hex bar is centered between the two mounting brackets. There should be a very small amount of side-to-side \"play\" to prevent the bar from seizing up as the engine grows slightly during thermal expansion.
