Crank Trigger Wheel

The MSD Ignition Crank Trigger Wheel (ASY16719) is a precision-engineered ignition system component designed for high-performance engine builds and aftermarket ignition conversions. Built for enthusiasts and professional mechanics upgrading to MSD's advanced ignition systems, this trigger wheel replaces factory crankshaft-mounted components to enable accurate crank position sensing and optimized spark timing. Whether you're building a street performance engine, vintage muscle car restomod, or competition-grade powerplant, the crank trigger wheel is essential for reliable, repeatable ignition control at any RPM.

This trigger wheel mounts directly to the crankshaft and works in conjunction with MSD's magnetic pickup sensors to deliver precise crank angle information to the ignition module. The design features accurately spaced trigger points that allow the ignition system to calculate engine speed and timing advance in real time, enabling superior spark control across the entire RPM range. Weighing just 0.7 lbs with compact dimensions of 6.55 x 1.35 x 9 inches, the trigger wheel integrates seamlessly into tight engine bays while maintaining the dimensional accuracy required for consistent sensor-to-trigger gap clearance. MSD's manufacturing tolerances ensure repeatable performance and eliminate timing drift caused by worn or damaged factory components.

Professional mechanics and engine builders rely on the MSD Crank Trigger Wheel for engine swaps, carburetor-to-fuel-injection conversions, and custom ignition system installations where OEM crankshaft triggers are unavailable or incompatible. Installation requires careful alignment and verification of trigger-to-sensor spacing to ensure proper signal detection; most builders use a dial indicator and feeler gauge during setup. This component pairs with MSD ignition boxes, distributorless ignition modules, and engine management systems to unlock features like multi-spark capability, adjustable timing curves, and launch control. Verify fitment with your specific crankshaft diameter and engine block configuration before ordering.