The FAJS 40 IDF carburetor without cold start and with intake trumpet (C1-4) is an excellent value-for-money alternative to the original Weber IDF carbs. Designed for racing or warm climate use, this version omits the traditional choke mechanism, reducing complexity and improving throttle response.
Equipped with a high-flow intake trumpet, the carburetor improves airflow dynamics for better power delivery, especially at high RPM. It's well-suited for air-cooled engines, classic car builds, and performance conversions (VW, Fiat, Porsche).
Factory Jetting Configuration:
- Venturi: 28 mm
- Main Jet: 115
- Air Corrector Jet: 200
- Emulsion Tube: F11
- Idle Jet: 52
- Pump Jet: 50
- Needle Valve: 1.75
Benefits:
- No cold start mechanism
- Intake trumpet included
- Reliable performance on a budget
- Broad engine compatibility
- Part number: C1-4
