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This category features timing wheels (also known as trigger wheels) ala carte or with vehicle-specific mounting kits (for small block and big block Chevy applications.
We're glad you asked! Mounting a trigger wheel and hall effect sensor is no small task but it is doable. The wheel itself will need to be mounted to the crank pulley, either by attaching it in front or behind the pulley. Generally mounting it in front is better--otherwise you have to move all of the accessory pullies forward by the same amount to ensure belt alignment.
When you have an idea of where you want to mount the wheel, identify a location for the sensor. Trigger wheels are available in 5-inch to 8.5-inch diameters. The sensor must be mounted facing the outside edge of the wheel, centered with a gap of roughly .030 inches. You will need to build a bracket that allows for some adjustability while holding the senssor absolutely fixed relative to the pulley. This can be particularly challenging in high-power or harsh offroad conditions.
When you have identified and obtained your trigger wheel, mount the wheel to the pulley. In most cases, it is best to turn this task over to a machine shop. They should be able to do this for a reasonable amount of money. The wheel must be absolutely centered on the pulley, with no run-out or "wobbble" in the space between the mounted sensor and the edge of the pulley.
Once the pulley is mounted, a mount can be crafted for the sensor. This mount must be relatively impervious to vibration and not allow the sensor to be displaced by the torque of the engine. The mount must be attached to the engine itself, otherwise the normal movement of the engine on it's mounts will make the sensor completely unreliable.
We will be putting a course on this topic on our Holley EFI University soon--watch for that. Until then, if you have any question at all, please contact us and we will be glad to give you expert guidance!