IDA Idle Jet F10-60

EMPI IDA Idle Jet F10-60 - Precision Tuning for Weber & EMPI Carburetors

Product Overview

The EMPI IDA Idle Jet F10-60 is a critical component for fine-tuning the low-speed circuit of your IDA-style carburetors. Designed for use with Weber IDA and EMPI EPC 48/51 series carburetors, this jet ensures your aircooled engine receives the precise fuel-to-air mixture required for smooth idling and a seamless transition to the main circuit. Whether you are building a high-performance street machine or a dedicated drag racer, having the correct idle jet size is essential for peak driveability and throttle response.

Technical Specifications

This specific jet features an F10 emulsion profile with a .60 orifice size. At Appletree Automotive, we provide these as individual units (sold each), allowing you to mix and match sizes for a perfect custom tune. The high-quality brass construction ensures long-term durability and resistance to modern fuel additives. This part is compatible with most IDA-style carburetors commonly found on high-performance VW Type 1, Type 2, and Type 3 engines.

Pro Tech Tips for IDA Tuning

Eliminate the Transition Flat Spot: If your VW experiences a stumble or "flat spot" when moving from idle to partial throttle, your idle jet is likely too lean for your engine's vacuum profile. Stepping up to a .60 size like the F10-60 can often provide the necessary fuel to bridge the gap before the main jets take over, smoothing out your acceleration.

Never Use Wire to Clean Jets: When maintenance is required, avoid using wire or metal picks to clear a clogged IDA idle jet. Because brass is a soft metal, even a tiny scratch inside the orifice will permanently alter the flow rate and ruin your tune. Always use compressed air or a specialized carburetor cleaning solution to clear debris.

Check for Synchronized Airflow First: Before swapping jets to solve a rough idle, ensure your dual carburetors are perfectly synchronized using a flow meter or Uni-Syn tool. An imbalance in airflow between the left and right banks can often mimic the symptoms of an incorrect jet size, leading to unnecessary tuning frustration.