Ignition Ref/Sync Sensor Kit, 127mm Pulley Without Air Conditioning. Porsche 911 1974-89  ❭  AMS9050053KIT

Ignition ref/sync sensor kit by Adapt Motorsport for classic Porsche engines. This Sync 2 version combines two Hall effect sensors with a 127mm crank pulley and 36-1 trigger disc for sequential fuel injection and ignition control.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50

Check fitment for your specific vehicle, engine casing, distributor gear and engine-management system before ordering.

What This Product Does

The crank-mounted sensor reads the teeth and missing-tooth reference on the 36-1 trigger disc, allowing the ECU to calculate crankshaft position and engine speed. A second sensor within the distributor-location module generates one reference pulse every 720 degrees, identifying the engine cycle so the ECU can distinguish between the compression and exhaust strokes.

Together, these signals provide the engine-position information required by a suitable aftermarket ECU to operate sequential fuel injection and ECU-controlled ignition.

Functions

• Measures crankshaft position and rotational speed.
• Provides a once-per-engine-cycle synchronisation signal.
• Supports sequential injection and ignition strategies.
• Replaces the original distributor body at its mounting location.
• Supplies digital Hall effect signals to a compatible ECU.

Technical Details

• Sync 2 dual-sensor body assembly.
• Two ZF digital Hall effect sensors.
• 127mm crank pulley for parallel-end crankshafts.
• 36-1 crank trigger disc.
• Recommended sensor supply: 8V; operating range stated by the manufacturer as 5–12V.
• Machined aluminium housing with anodised finish, maintenance-free bronze bush and sealed roller bearing.

Kit Contents

• Main two-sensor body assembly.
• Two ZF Hall effect sensors.
• 127mm crank pulley and 36-1 trigger disc.
• Wiring, terminals and connectors for integration with the vehicle wiring loom.

Installation Requirements

The module mounts in the original distributor location and reuses the factory distributor gear. Installation requires wiring to a compatible ECU, adjustment of the sensor air gap and configuration of the reference position within the ECU software.

Because this kit replaces the distributor, the engine must use coil-on-plug ignition or another arrangement with an individually controlled ignition lead for each cylinder. The ECU must control the ignition events.

Why Replacement Matters

A modern sequential engine-management system requires accurate crankshaft speed, crank position and engine-cycle information. This combined trigger and synchronisation arrangement supplies both signals without relying on the original distributor to distribute the ignition spark.

Important Notes

• This kit is not compatible with Porsche 964 or 993 3.6L engine cases; Adapt Motorsport offers a separate sensor solution for those engines.
• On 2.7L magnesium engine cases, a small boss near the crank pulley must be trimmed or die-ground to provide trigger-disc clearance.
• Confirm ECU compatibility, sensor supply voltage, distributor gear suitability and pulley clearance before installation.

FAQs

• Does the kit provide both crank and engine-cycle signals?
  Yes. One sensor reads the 36-1 crank trigger while the internal reference sensor produces one pulse every two crankshaft revolutions.
• Can the original distributor ignition arrangement be retained?
  No. The module occupies the distributor location, so ECU-controlled coil-on-plug or an individual ignition lead and coil arrangement is required.
• Does it fit Porsche 964 or 993 3.6L cases?
  No. Those engine cases require the separate 964/993 sensor product.
• Is modification required on a 2.7L engine?
  The manufacturer states that magnesium 2.7L cases require a small crankcase boss to be trimmed for trigger-disc clearance.