Split Collar 1.812 ID 8-Magnet

The Split Collar 1.812 ID 8-Magnet from RACEPAK is a precision magnetic pickup collar engineered for engine data acquisition and speed measurement in performance tuning and dyno applications. This instrument-grade component mounts directly onto engine shafts and crankshafts to capture real-time rotational data with exceptional accuracy. Professional tuners, engine builders, and racing teams rely on this collar to feed reliable signal input to RACEPAK data loggers and performance monitoring systems.

Constructed from lightweight aluminum, the Split Collar 1.812 ID 8-Magnet features a precisely machined 1.812-inch inner diameter with an eight-magnet configuration optimized for clean, repeatable pulse generation. The 0.375-inch width ensures stable retention on engine rotating components while minimizing rotational imbalance. Eight strategically positioned magnets trigger the magnetic pickup sensor with each shaft revolution, delivering the high-resolution signal data critical for accurate RPM readout, timing analysis, and combustion event correlation. The split-collar design enables tool-free installation and removal without complete engine disassembly, reducing downtime during data system setup or recalibration.

This collar is ideal for users operating RACEPAK data acquisition systems on naturally aspirated and forced-induction engines in road racing, drag racing, and engine development environments. The 1.812-inch bore accommodates most modern crankshaft diameters and compatible auxiliary shafts. Installation pairs seamlessly with RACEPAK magnetic pickup sensors and compatible wiring harnesses; verify shaft diameter and clearance before ordering to ensure proper fit and sensor alignment. Weighing just 0.27 lbs, it introduces negligible mass to the rotating assembly while maintaining the precision necessary for professional-grade telemetry.