Haltech Driveshaft Split Collar 1.812″ / 46mm I.D. 8 Magnet Size: ID: 1.812″ / 46mm

Precision Drivetrain Feedback: Driveshaft Split Collar 1.812″ (46mm)

The Haltech Driveshaft Split Collar with a 1.812″ (46mm) I.D. is a high-precision trigger device designed for performance drivetrain integration. This collar features an 8-magnet trigger wheel, providing the definitive speed input required for sophisticated engine management functions. For builders of RB26, K-swap, or compact LS-swap chassis using a 46mm driveshaft, this component is the key to unlocking true traction control, launch management, and automated gear detection within your standalone ECU integration.

Engineering Principles: 8-Tooth Magnetic Logic

This split collar converts the rotation of the driveshaft into a digital frequency signal. By using 8 equally spaced high-strength magnets, it provides 8 pulses per revolution, which is the industry standard for high-resolution ground speed sensing. This Analogue-to-Digital interface (frequency to speed) allows the ECU to monitor driveshaft acceleration with unparalleled precision. Unlike OEM inductive sensors that can “drift” or lose signal at high RPM, this Hall-compatible collar ensures a crisp, jitter-free signal. This is a critical requirement for maintaining accurate Ignition Timing and boost offsets during the high-load events common in closed-loop boost control tuning.

Operational Benefits: Traction control and Launch Logic

The core benefit of the Haltech 46mm Split Collar is the enablement of Speed-Based Power Management. In high-horsepower 2JZ or SR20 applications, knowing the exact ground speed allows the tuner to create multi-stage launch control maps. If the ECU detects the driveshaft speed exceeding a set threshold (indicating wheel spin), it can instantly drop power to regain grip. This is vital for detonation protection; by preventing uncontrolled high-RPM tyre spin, the ECU protects the drivetrain from shock-loading and the engine from the extreme lean-out risks of free-revving under boost. The 8-magnet resolution ensures the ECU can make these calculations multiple times per second.

Fitment and Dimensional Precision

This collar is meticulously designed to suit 1.812″ (46mm) driveshafts. The split design allows for a zero-disassembly installation, clamping over the existing shaft with a secure, non-slip fit. The kit includes the 5/32 Allen Key needed for the high-strength fasteners. With an outer diameter of 86mm and a width of 9.54mm, this collar is perfectly sized for tight under-chassis fitment. It is a universal component that integrates seamlessly with Haltech Nexus and Elite ECUs. For a professional harness integration, pair this collar with a high-quality Hall-effect sensor and mount it rigidly to the transmission or chassis with a 1.0mm gap.

Technical Specifications

Summary & Includes

The Haltech 1.812″ Split Collar is the prerequisite for professional speed-density and traction tuning. Includes: 1 x Driveshaft Split Collar 1.812″ I.D. 8 Magnet and 1 x 5/32 Allen Key. Note: Essential for high-resolution speed telemetry in compact driveline setups.