Emulsion Tube, F6, for Dfv, DgV, ICT & EPC Carbs

OVERVIEW

Precision fuel delivery is the backbone of any high-performing air-cooled engine, and the EMPI Emulsion Tube (F6) is a critical component for achieving that perfect stoichiometric balance. Designed specifically for the Weber DGV and DFV progressive series, as well as the popular ICT and EMPI EPC 34mm carburetors, this emulsion tube plays the vital role of mixing air from the air corrector jet with fuel from the main jet. By aerating the fuel before it reaches the booster venturi, the F6 tube ensures a finer mist, which leads to more efficient combustion, sharper throttle response, and the elimination of those frustrating flat spots that often plague Type 1 and Type 3 engines during the transition from the idle circuit to the main circuit. Whether you are cruising in a classic Beetle or tearing up the dunes in a sand rail, the right emulsion tube calibration is the difference between a sluggish motor and a crisp, responsive powerhouse.

Crafted from high-quality, corrosion-resistant brass, this EMPI emulsion tube is machined to exacting tolerances to ensure consistent performance across all cylinders. In the world of VW tuning, the "F" series designation is not just a part number; it represents a specific geometry of holes drilled at precise heights along the tube. The F6 profile is a staple for many 1600cc to 1776cc builds running progressive or dual-single setups, providing the necessary enrichment or leaning characteristics required at specific RPM ranges. Don''t let a clogged or improperly sized tube ruin your driving experience. Upgrading to a fresh, genuine EMPI component ensures that your Weber or EPC carburetors are functioning exactly as the engineers intended, protecting your investment and maximizing the horsepower of your air-cooled flat-four.

FITMENT

This F6 emulsion tube is designed for use in the following carburetor models and air-cooled VW applications:

• Carburetor Models: Weber 32/36 DGV, 32/36 DFEV, 34 ICT, and EMPI 34 EPC series.
• VW Beetle (Type 1): All years equipped with Weber Progressive or Dual ICT/EPC setups.
• VW Karmann Ghia: 1956-1974 models utilizing aftermarket Weber or EMPI carburetion.
• VW Bus (Type 2): 1950-1971 (1600cc engines) and Type 4 conversions running DGV or ICT carbs.
• VW Type 3 (Squareback, Fastback, Notchback): Models converted to dual 34mm EPC or ICT carburetors.
• VW Thing (Type 181): 1973-1974 models with upgraded fuel systems.
• Custom Applications: Dune Buggies, Sand Rails, Trikes, and Baja Bugs running air-cooled VW powerplants.

SPECS

The following technical specifications ensure this component meets your specific tuning requirements:

• Part Number: 43-5682-0
• Series Type: F6 Emulsion Profile
• Material: Heavy-duty, precision-machined brass for long-term fuel resistance.
• Compatibility: Fits Weber DGV, DFV, DFEV, ICT, and EMPI EPC Carburetors.
• Function: Air/Fuel pre-mixing (Emulsification) for the main discharge circuit.
• Sold As: Individually (One tube per carburetor).
• Manufacturing: Produced by EMPI to strict quality control standards.

PRO TIPS

Pro Tip 1: The Art of Cleaning. When rebuilding your Weber or EPC carburetors, never use a metal wire or a welding tip cleaner to clear the holes in your F6 emulsion tube. Brass is a relatively soft metal, and even a slight scratch or enlargement of the precision-drilled holes can completely alter the fuel curve. Always use a high-quality aerosol carburetor cleaner followed by a blast of high-pressure compressed air to ensure the passages are clear without damaging the internal geometry.

Pro Tip 2: Identifying Transition Issues. If your air-cooled VW experiences a "stumble" or "lean pop" exactly when you are accelerating away from a stop sign (the transition phase), the emulsion tube is often the culprit. The F6 is a fantastic all-around performer, but if you have recently increased your engine displacement or changed your camshaft profile, you may need to verify that your air corrector jet and emulsion tube are working in harmony. If the stumble persists despite a clean tube, check for vacuum leaks at the intake manifold base before changing your tube series.

Pro Tip 3: Proper Seating is Key. When installing the EMPI 43-5682-0, ensure that the tube is fully seated in the main well before installing the air corrector jet on top of it. If the tube isn''t seated properly, air can bypass the emulsion process, leading to a rich condition and poor fuel atomization. Ensure the well is free of debris or old fuel varnish. A tiny drop of light oil on the threads of the air corrector can help prevent galling and ensure a snug, airtight fit for the entire assembly.