Holley's EFI Crank Trigger Kit delivers an accurate crank speed and position signal to Holley EFI systems in the most demanding, high-horsepower racing applications. Crank position is measured every 10 degrees versus every 45 degrees on a standard 4-magnet, MSD-style crank trigger, and the kit is built for early small block Chevy applications using a standard ATI or Fluidamper-style balancer up to 7-1/4" in diameter.
Specifications:
- Product Type: Crank Trigger Kit
- Application: Small Block Chevy
- Trigger Type: 36-1 tooth
- Trigger Wheel: 8" outside diameter, 1/4" thick, billet steel, Black Zinc Oxide finish
- Sensor Type: Hall Effect, custom 3-wire ferrous-target, M12x1mm threads
- Mounting Brackets: Billet 6061-T6 aluminum, black anodized, laser-etched Holley EFI logo
- Hardware: Grade 8 and Mil-Spec mounting hardware included
- Part Number: 556-116
The crank wheel centers off the balancer's hub, eliminating the need for a centering ring. It will not work on balancers without a center-hub extrusion (such as Innovators West) and is not for use with Holley EFI on a 4x LSx or Chrysler V8 NGC cam sensor setup.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What balancers does this crank trigger work with?
It's designed for a standard ATI or Fluidamper-style balancer up to 7-1/4" in diameter with a center-hub extrusion; it will not work on balancers without one, such as Innovators West.
How accurate is the crank position signal?
Position is measured every 10 degrees, compared to every 45 degrees on a standard 4-magnet, MSD-style crank trigger.
Can this be used with an LSx or Chrysler NGC cam sensor setup?
No, it's not for use with Holley EFI on a 4x LSx or Chrysler V8 NGC cam sensor configuration.
Is this legal for street use?
No, this part is legal for Racing Use Only vehicles and cannot be installed on emissions-controlled street vehicles.
