How to find the right Automotive Replacement Ignition Trigger Wheel Assemblies AI guide

Written by an AI model from its trained knowledge.

What the AI looks for in Automotive Replacement Ignition Trigger Wheel Assemblies

Tooth pattern matches the controller: The wheel pattern, such as 36-1 or 60-2, must be one that the ECU or ignition box can decode. The controller can only read the patterns it is programmed for. Any other pattern gives no sync or wrong timing.
Sensor type and gap: Match the sensor type (variable reluctance or Hall) and the wheel material to the controller's input. Set the gap to the sensor maker's spec. Variable-reluctance and Hall inputs need different signals, and the gap affects signal strength.
Missing-tooth position: Index the wheel so the missing tooth sits where the controller expects it, then confirm base timing with a timing light. Wrong indexing shifts the whole timing map.
Fit and runout: Mount the wheel concentric to the crank or balancer with minimal runout, using the hub or adapter made for that engine. Wobble changes the gap as the wheel turns, and the signal drops out at higher RPM.

MSD: Long-established crank trigger kits for performance ignition.
Accel: Performance ignition brand that offers trigger components.
PerTronix: Distributor trigger conversions that replace points with electronic triggering.
Standard Motor Products: OE-style replacement reluctor and tone rings for production vehicles.

Buying a trigger wheel before confirming which patterns your ECU supports.
Pairing a Hall sensor with a wheel or input designed for variable reluctance without checking compatibility.
Mounting the wheel with improvised hardware that allows runout.

The wheel is spaced for 36 teeth with one tooth removed. The gap gives the controller a reference point for crank position.