Weber IDF Idle Jet 57, for Idf & HPMX

Weber IDF & HPMX Idle Jet - Size .57

Product Overview

Precision tuning is the key to a smooth-running air-cooled engine. This EMPI Weber IDF Idle Jet, size .57, is designed specifically for Weber IDF and EMPI HPMX carburetors. It allows for fine-tuning of the idle circuit and the critical transition phase before the main circuit takes over.

Vehicle & Carburetor Fitment

This idle jet is a direct fit for all Weber IDF series carburetors and EMPI HPMX clones. These are most commonly utilized in dual-carburetor configurations on Volkswagen Type 1 Beetles, Karmann Ghias, Type 2 Buses, and off-road Dune Buggies or Sand Rails. If your engine is experiencing a lean condition at low RPMs, upgrading to a .57 jet can provide the necessary fuel flow for improved throttle response.

Pro Tech Tips from Appletree Auto

Smooth Out the Transition: The idle jet is responsible for your engine's performance from idle up to roughly 2,500-3,000 RPM. If your VW stumbles or hesitates just as you begin to accelerate, it is often a sign that your idle jet is too small. Stepping up to a .57 jet can help bridge the gap between the idle and main circuits for a seamless power band.

Check for Clogs First: Because the orifices in a .57 jet are extremely small, they are easily obstructed by tiny particles of dirt or fuel deposits. Before changing your jetting, always remove the jet holder and clear the jet with compressed air or carburetor cleaner to ensure a blockage isn't the cause of your tuning issues.

Avoid Over-Tightening: When installing these jets into the carburetor body, remember that they seal via an O-ring on the jet holder. You only need to tighten the holder until it is snug. Over-tightening can damage the brass jet, the holder, or the threads in the carburetor casting itself.