Weber Jet Size Calculator

FAQs

What size are Weber idle jets? The size of Weber idle jets can vary, but they typically range from around 40 to 70.

What size jet is on a Weber 32/36 stock? A stock Weber 32/36 carburetor often comes with a primary main jet size of approximately 135-140.

What size is a Weber jet? Weber jets come in various sizes, typically ranging from 30 to 200, depending on the application.

What size jets are in the Weber 38 DGAS? The Weber 38 DGAS may have different jet sizes depending on the specific configuration and application. Jet sizes for the 38 DGAS could be in the range of 140-180 for the main jets.

How do I know what size jet I need? The correct jet size depends on various factors, including engine size, modifications, altitude, and more. It’s best to consult a tuning guide or a professional tuner for your specific setup to determine the appropriate jet size.

What size pilot jet should I use? The pilot jet size depends on factors like engine displacement and idle requirements. A common starting point for Weber carburetors is around 50-60 for pilot jet sizes.

Are Weber jets interchangeable? In some cases, Weber jets can be interchangeable within a specific carburetor series, but it’s crucial to consult the manufacturer’s documentation or a Weber specialist to ensure compatibility.

How do I know what size carb jet I have? The size of a carburetor jet is typically stamped or engraved on the jet itself. You can remove the jet and inspect it for the size markings.

What size is a 40 pilot jet? A 40 pilot jet typically has a diameter of around 0.40 millimeters.

What size is a 60 jet? A 60 main jet typically has a diameter of around 0.60 millimeters.

What is the CFM of a Weber 32/36 carburetor? The CFM (cubic feet per minute) rating of a Weber 32/36 carburetor is estimated to be around 300-350 CFM.

Are all carb jets the same size? No, carburetor jets come in various sizes to accommodate different engine sizes, configurations, and applications.

What is the fuel pressure for a Weber 38? Typically, the fuel pressure for a Weber 38 carburetor is set at around 3-4 psi (pounds per square inch).

How many CFM is a Weber 38? The CFM rating of a Weber 38 carburetor can vary depending on the specific model and configuration but is generally estimated to be in the range of 400-500 CFM.

What happens if your jet is too big? If the jet is too large, the engine may run rich, resulting in poor fuel economy, fouled spark plugs, and potentially decreased performance.

What happens if the main jet is too small? If the main jet is too small, the engine may run lean, which can cause overheating, loss of power, and potential damage to the engine.

How do I know if my pilot jet is too small? If the engine has difficulty idling, stumbles when transitioning from idle to part-throttle, or exhibits poor throttle response at low RPMs, the pilot jet may be too small.

Do I need a bigger main jet? You may need a larger main jet if your engine is running too lean and experiencing a loss of power or overheating. Consult a tuner for specific recommendations.

What is the correct pilot jet setting? The correct pilot jet setting depends on your engine’s requirements. Tuning guides or professional tuners can help you determine the appropriate setting.

What is the difference between a pilot jet and a slow jet? A pilot jet and a slow jet typically refer to the same component in a carburetor. They control the air-fuel mixture at idle and low RPMs.

How do I know what model my Weber is? You can often identify the model of your Weber carburetor by looking for a nameplate or identification label on the carburetor body. Additionally, the model may be stamped or engraved on the housing.

What size are Weber carburetors? Weber carburetors come in various sizes and configurations, ranging from smaller models like the Weber 32/36 to larger models like the Weber 48. The size refers to the throat diameter of the carburetor.

Will bigger jets in a carburetor make more power? Not necessarily. The jet sizes in a carburetor need to be properly matched to the engine’s requirements for optimal performance. Using excessively large jets can lead to poor performance and fuel economy.

Do carb jets wear out? Carburetor jets can wear out over time, especially if they are exposed to contaminants or corrosive substances. Regular maintenance and cleaning can help extend their lifespan.

Does a bigger carb need bigger jets? A larger carburetor may require larger jets to provide the correct air-fuel mixture for the engine’s increased airflow, but this depends on the specific engine and application.

Is my pilot jet too big? Your pilot jet may be too big if the engine exhibits symptoms of running rich at idle, such as black smoke from the exhaust and poor idling performance.

What size is a 35 jet? A 35 main jet typically has a diameter of around 0.35 millimeters.

Is the pilot jet bigger than the main jet? No, the pilot jet is typically smaller in size than the main jet.

What size is a #100 jet? A #100 jet would have a diameter of approximately 0.1 inches (2.54 millimeters).

What size jet is a 4412? The jet size for a 4412 carburetor can vary depending on the specific model and application. Consult the manufacturer’s documentation for precise jet size information.

How fast will a 60/40 jet go? The jet size alone does not determine the speed of a vehicle. Vehicle speed depends on various factors, including engine power, gearing, weight, and aerodynamics. The 60/40 jet sizing refers to carburetor jet sizes and is not directly related to vehicle speed.