Air Jet DGV, DFV, ICT, EPC 110

Overview

When it comes to dialing in the performance of your air-cooled engine, precision is the name of the game. The EMPI Air Jet for DGV, DFV, ICT, and EPC carburetors, sized at .110, is a critical component for any serious tuner or weekend mechanic looking to achieve the perfect stoichiometric balance. These air correction jets are responsible for bleeding air into the main fuel circuit, which effectively "leans out" the mixture as the engine speed increases. Without the correct air jet size, you risk either a bogging, over-rich condition at high RPMs or a dangerously lean state that could lead to overheating and engine damage. Whether you are running a single progressive Weber on a daily driver or a dual ICT setup on a performance-built Type 1, having the right jetting is the difference between a car that just runs and a car that screams across the power band. This .110 jet provides the fine-tuning capability needed to account for atmospheric changes, fuel quality, and engine modifications.

This specific .110 air jet is manufactured by EMPI, a name synonymous with Volkswagen performance for decades. It is designed to fit a wide variety of "Holley-Weber" style carburetors, including the popular 32/36 DGV progressive series and the symmetrical ICT 34mm units often found on dual-carb kits for Beetles and Buses. Because air density changes with altitude and temperature, having a selection of these jets in your toolbox is essential for fine-tuning your air-cooled flat-four. If you have recently installed a new exhaust system, upgraded your cylinder heads, or moved to a higher altitude, your engine''s air demands have changed significantly. This EMPI .110 air jet is precision-machined from high-quality brass to ensure consistent flow rates and a perfect seal within the carburetor body. Don''t settle for a "close enough" tune when you can achieve perfection with the right jetting components from Appletree Automotive.

Fitment

This air jet is designed for use with specific Weber and EMPI carburetor models often adapted to the following Volkswagen and air-cooled vehicles:

• Volkswagen Beetle: 1950-1977 (Standard and Super Beetle models)
• Volkswagen Karmann Ghia: 1956-1974
• Volkswagen Bus / Transporter: 1950-1979 (Type 2 Split Window and Bay Window)
• Volkswagen Type 3: 1961-1973 (Squareback, Fastback, Notchback)
• Volkswagen Thing (Type 181): 1973-1974
• Carburetor Compatibility: Weber 32/36 DGV, DGAV, DGEV Series
• Carburetor Compatibility: Weber 34 ICT Series
• Carburetor Compatibility: Weber DFV, DFAV, DFEV Series
• Carburetor Compatibility: EMPI 34 EPC Series
• Carburetor Compatibility: Holley 5200 Series (Progressive types)

Specs

• Brand: EMPI
• Part Number: 77201.110
• Jet Size: .110 (1.10mm)
• Material: Precision-Machined Solid Brass
• Circuit Type: Air Correction / Main Circuit Bleed
• Thread Type: Application-specific for DGV/ICT series
• Quantity: Sold Individually
• Application: High-speed mixture enrichment control

Pro Tips

Pro Tip 1: Understanding the Inverse Relationship

It is vital to remember that air correction jets work inversely compared to main fuel jets. While a larger fuel jet makes the engine richer, a larger air jet, like this .110, actually makes the mixture leaner at high engine speeds. This is because a larger hole allows more air to mix with the fuel before it leaves the emulsion tube. If your VW is puffing black smoke or "four-stroking" at the top end of a gear, stepping up to a larger air jet can help lean out that mixture and restore crisp throttle response. Conversely, if you feel a "flat spot" or surging at high speeds, you might need a smaller air jet to keep the fuel mixture dense enough. Don''t make the mistake of assuming bigger always means more fuel!

Pro Tip 2: Cleaning and Maintenance Protocol

When servicing your carburetors, never use a metal wire or a welding tip cleaner to clear a clogged air jet. Brass is a relatively soft metal, and even a tiny scratch inside the orifice of a .110 jet can significantly alter its flow characteristics, ruining your tune. Always use aerosol carburetor cleaner followed by compressed air to clear obstructions. If a jet is stubborn or shows signs of green corrosion from old fuel, it is far better to replace it with a fresh EMPI jet than to risk a lean-out condition caused by an inconsistent flow through a damaged part. Keep your jets stored in a clean, dry container to prevent oxidation.

Pro Tip