Pump Jet, 60 for D-Series Carb, Sold Each

OVERVIEW

Precision tuning is the heartbeat of a high-performance air-cooled engine, and the EMPI Pump Jet for D-Series carburetors is a critical component in achieving that perfect throttle response. When you step on the gas, your engine demands an immediate, measured shot of fuel to bridge the gap between the idle circuit and the high-speed main circuit. If your Volkswagen is suffering from the dreaded ''flat spot'' or a momentary hesitation during acceleration, it is often a sign that your accelerator pump circuit is under-delivering. This size 60 pump jet is engineered to provide a robust squirt of fuel, ensuring that your Beetle, Karmann Ghia, or Bus pulls away from the line with authority and smoothness. As a master specialist, I cannot stress enough that even the most expensive engine build will feel sluggish if the pump jet isn''t calibrated to match your specific displacement and atmospheric conditions.

Manufactured by EMPI to exacting tolerances, this D-Series pump jet is designed for longevity and consistency. These jets are crafted from high-quality brass to resist the corrosive properties of modern fuels, including those with ethanol content. Whether you are running a classic Weber DGV, DFEV, or the EMPI EPC series of progressive carburetors, having a selection of jets on hand is essential for dialling in your air-fuel mixture. The size 60 orifice is often the ''sweet spot'' for street-performance 1600cc to 1776cc engines that require a slightly richer transition than the standard factory settings provide. By upgrading to this genuine EMPI component, you are investing in the drivability and reliability that Appletree Automotive customers have come to expect for their vintage VW projects and off-road dune buggies.

FITMENT

• VW Beetle (Type 1): All years equipped with D-Series/Progressive carburetors.
• VW Super Beetle: 1971-1979 models running DGV or DFEV style carbs.
• VW Karmann Ghia: Fits all years utilizing EMPI or Weber D-Series induction.
• VW Bus / Transporter (Type 2): Ideal for Bay Window and Split Window models with progressive carb setups.
• VW Type 3 (Fastback, Squareback, Notchback): Custom applications using D-Series carburetors.
• VW Thing (Type 181): Perfect for off-roaders looking to eliminate hesitation on inclines.
• Dune Buggies & Sand Rails: Any air-cooled VW based rail using D-Series progressive carbs.
• Compatible Carburetor Models: Fits Weber DGV, DGAV, DGEV, DFV, DFAV, DFEV, and EMPI EPC 32/36 series.

SPECS

• Jet Size: 60 (0.60mm Orifice).
• Material: Precision-machined solid brass.
• Compatibility: D-Series, DGV, DFEV, and EPC style carburetors.
• Function: Controls the volume of fuel delivered by the accelerator pump circuit.
• Sold As: Individually (Each).
• Manufacturer: EMPI.
• Part Number: 44-1097-0.
• Thread Pitch: Standard D-Series internal fitment.

PRO TIPS

1. Eliminating the Acceleration Stumble

If your engine coughs or ''pops'' back through the carburetor when you quickly open the throttle, you are likely dealing with a lean condition. Moving to a size 60 pump jet provides a larger volume of fuel to compensate for the sudden rush of air. Always ensure your accelerator pump diaphragm is in good condition before swapping jets; a torn diaphragm will mimic a clogged or undersized jet. When you install this jet, verify that the ''squirt'' of fuel is aimed directly down the throat of the carburetor and doesn''t hit the side walls or the throttle shaft, as this causes poor atomization and wastes the extra fuel you''re trying to deliver.

2. Routine Maintenance and Cleaning

Because the orifice of a size 60 jet is extremely small, even a microscopic speck of debris can partially block the flow, leading to inconsistent performance. I highly recommend running a high-quality fuel filter between your fuel pump and the carburetor. If you notice a sudden change in throttle response, remove the pump jet and blow it out with compressed air or a dedicated carburetor cleaning spray. Never use a wire or a drill bit to clean the jet, as brass is soft and you will inadvertently enlarge the hole, completely changing the jet''s flow characteristics and ruining your tune.

3. Tuning for Climate and Altitude

Remember that air density changes with temperature and altitude. If you are taking your dune buggy from the valley up into the mountains, your engine may naturally run richer because the air is thinner. However, for most street-driven Volkswagens at sea level to moderate elevations, the size 60 pump jet is an excellent baseline. If you find that the car ''bogs'' or feels heavy and smells like raw gas when you accelerate, you might actually be too rich and need to step down a size. Tuning is a process of trial and error; keep a log of how the car reacts to different jet sizes under various driving conditions to find the perfect setup for your specific engine build.