This 3-port boost control solenoid is built for optimal performance with the boost control function of Holley EFI. It's driven directly by a Pulse Width Modulated (PWM) output of the ECU, and some setups will require two solenoids while others need only one.
Specifications:
- Ports: 3-port design
- Connector Type: 2-pin Metri-Pack 150
- Height: 1.97"
- Width: 1.10"
- Depth: 0.94"
- Port Size: 1/8" NPT
- Pigtail Length: 18"
- Includes: Solenoid, ECU pigtail harness with factory-crimped ECU pin, three 3/16" barb fittings, one 1/8" NPT plug, one sintered brass muffler, and a spare ECU pin
- Used with Dominator and HP ECUs
- Part Number: 557-200
It's advised not to use the PWM+ outputs on an HP ECU — use the PWM- outputs instead. On a Dominator ECU, use either the PWM- outputs or a PWM+ output on the J2B connector.
FAQ
How is this solenoid controlled?
It's driven directly by a Pulse Width Modulated (PWM) output from the ECU.
Do I need one or two solenoids?
It depends on the setup — some boost control configurations require two solenoids, while others need only one.
Which ECU outputs should I use on an HP ECU?
Use the PWM- outputs rather than the PWM+ outputs on an HP ECU.
What's included in the kit?
The kit includes the solenoid, an ECU pigtail harness with a factory-crimped ECU pin, three 3/16" barb fittings, a 1/8" NPT plug, a sintered brass muffler, and a spare ECU pin for modified harness lengths.
