1961-1979 Beetle Bus Ghia Weber 40 IDF Carburetor 1500cc-1835cc
Maximize horsepower and performance on your 1961–1979 Air Cooled Volkswagen with this Weber 40 IDF carburetor — pre-jetted for VW engines up to 1835cc and race proven for decades of ultimate engine tuning.
The Weber 40 IDF is one of the most respected and race-proven performance carburetors in the Air Cooled VW world — and for good reason. Separate idle and main circuits with changeable air and fuel jets give the tuner complete control over fuel metering at every point in the RPM range. Intake air is metered by changeable venturis and the accelerator pump is adjustable for maximum acceleration. Jets, gaskets, and repair parts are available worldwide for long-term service support.
Pre-jetted for VW engines — the 40mm IDF is suitable for engines up to 1835cc. Velocity stacks are not included with the 40 IDF. Sold individually — two required for a complete dual carburetor setup. Rebuild kits are available separately.
Fits the Following Volkswagen Models:
- 1961–1977 Volkswagen Beetle Standard — 1500cc to 1835cc
- 1971–1979 Volkswagen Beetle Super — 1500cc to 1835cc
- 1961–1971 Volkswagen Bus — 1500cc to 1835cc
- 1961–1974 Volkswagen Karmann Ghia — 1500cc to 1835cc
- 1973–1974 Volkswagen Thing — 1500cc to 1835cc
- 1956–1979 Dune Buggy and Sand Rail — 1500cc to 1835cc
Features / Benefits:
- Weber 40 IDF performance carburetor for Air Cooled VW — pre-jetted for engines up to 1835cc
- Separate idle and main circuits with changeable air and fuel jets for ultimate tuning control
- Changeable venturis for correct intake air metering
- Adjustable accelerator pump for maximum acceleration performance
- Race proven performance and reliability — jets, gaskets, and parts available worldwide
- Velocity stacks not included — confirm stack requirements for your application
- Rebuild kits available separately for long-term service support
- Sold individually — two required for complete dual carburetor setup
Carburetor Specifications:
- Main jet: 115
- Idle jet: 55
- Air correction jet: 200
- Pump jet: 50
- EX pump jet: 550
- Emulsion tube: F-11
- Venturis: 28mm
Material / Finish:
Weber IDF carburetor construction for correct fuel delivery, maximum performance, and long-term Air Cooled VW engine service in dual carburetor applications.
Because Details Matter:
The Weber 40 IDF is what serious Air Cooled VW builders reach for when stock carburetion is no longer enough — total air and fuel metering control, changeable jets and venturis, and race proven performance that has been winning in the VW world for decades. Pre-jetted for your engine, parts available worldwide, and the tuning flexibility to extract every horsepower your 1500cc to 1835cc engine has to give. Sold individually — order two and build the dual setup your engine deserves.
Learn More from Our Knowledge Library
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VW Air-Cooled Type 1 Carburetor Installation Guide
Also known under these part numbers: (For reference only)