Idle Jet DGV, DFV, ICT, EPC 60

OVERVIEW

Precision tuning is the heartbeat of a high-performance air-cooled engine, and nothing dictates your off-the-line responsiveness quite like the idle circuit. The EMPI Idle Jet for DGV, DFV, ICT, and EPC series carburetors, sized at .60, is a critical component for any VW enthusiast looking to eliminate that frustrating off-idle stumble. Whether you are running a classic Weber 34 ICT setup on a dual-port 1600 or a progressive DGV on a stock 1500, the idle jet is responsible for much more than just the engine''s behavior at a stoplight. It controls the fuel-to-air ratio during the crucial transition phase from the idle circuit to the main high-speed circuit, typically up to about 2,500 RPM. By installing this precision-machined .60 jet, you are ensuring that your air-cooled powerplant receives the exact volume of fuel required to maintain a smooth, consistent pull through the lower power band, preventing lean-out conditions that can lead to overheating and poor driveability.

At Appletree Automotive, we know that "close enough" isn''t good enough when it comes to carburetor calibration. These EMPI idle jets are manufactured to exacting tolerances to ensure flow consistency across all cylinders, which is especially vital for dual-carburetor setups where synchronization is key. The .60 size is frequently the "sweet spot" for slightly modified engines or those running in climates where a standard .50 or .55 jet leaves the mixture too lean. Upgrading to this brass-constructed component allows for fine-tuned control over your air-fuel mixture, helping to cool combustion temperatures and providing the torque needed for heavy Type 2 Buses or spirited Beetle driving. Don''t let a tiny, clogged, or improperly sized jet hold back your engine''s potential; swap in a fresh .60 EMPI jet and experience the crisp throttle response your Volkswagen was designed to deliver.

FITMENT

This idle jet is designed for use with specific Weber and EMPI carburetor series commonly found on air-cooled Volkswagens and various universal automotive applications including:

• Weber Carburetor Models: DGV, DGAV, DGEV (Progressive), DFV, DFAV, DFEV, and 34 ICT Series.
• EMPI Carburetor Models: EPC 34, EPC 38, and EPC 32/36 Progressive series.
• Holley/Weber Conversions: Compatible with many 5200 series licensed clones.
• VW Beetle (Type 1): All years equipped with ICT or Progressive carburetor conversions.
• VW Bus/Transporter (Type 2): 1950-1979 models utilizing aftermarket Weber or EMPI induction.
• VW Karmann Ghia (Type 14): Dual ICT or single Progressive carburetor setups.
• VW Thing (Type 181): All years using compatible performance carburetors.
• VW Squareback/Fastback (Type 3): Dual ICT setups on pancake engines.

SPECS

• Manufacturer: EMPI
• Part Number: 74403.060
• Jet Size: .60 (0.60mm)
• Material: High-Quality Precision Machined Brass
• Application: Idle / Low-Speed Transition Circuit
• Compatibility: Weber DGV, DFV, ICT / EMPI EPC Series
• Thread Type: Standard Weber Idle Jet Pitch
• Quantity: Sold Individually (Each)

PRO TIPS

1. The Transition Phase Secret

Many VW owners mistakenly believe the idle jet only works when the car is sitting still. In reality, the idle circuit (and therefore the idle jet size) controls the fueling for nearly the first 25% of your throttle opening. If you experience a "flat spot" or a "bog" when you first step on the gas before the main jets kick in, your idle jet is likely too small or partially clogged. Moving to a .60 jet can often bridge that gap between the idle and main circuits, providing a seamless transition and much smoother acceleration during city driving.

2. Never Use Wire to Clean Jets

When tuning your Weber or EMPI carb, you might find old jets that look salvageable. However, never attempt to clean a brass jet by poking a wire, needle, or drill bit through the orifice. Brass is a soft metal, and even a tiny scratch from a steel wire will change the flow characteristics and ruin the jet''s calibration. Always use compressed air and a high-quality carburetor cleaning solvent to clear obstructions. If the jet is heavily corroded or the orifice size is in question, it is always safer and more cost-effective to replace it with a brand new EMPI .60 jet to ensure your tuning remains accurate.

3. Check for Vacuum Leaks First

Before you commit to a larger idle jet size like the .60 to solve a lean condition, ensure your engine is free of vacuum leaks. Air-cooled VWs are notorious for leaks at the intake manifold boots, the carb base gasket, or the throttle shaft bushings. A vacuum leak introduces "unmetered air" into the system, making the engine run lean regardless of the jet size. Spray a small amount of carb cleaner around the intake joints while the engine is idling; if the RPM changes, you have a leak. Once you''ve confirmed the system is sealed, you can then accurately use the .60 idle jet to dial in your perfect air-fuel mixture for maximum performance.