This high-pressure water/methanol pump is designed for use with Holley HP and Dominator EFI systems, which characterize solenoid flow within the ECU for precise, tunable water/methanol delivery.
Specifications:
- Voltage: 12VDC nominal
- Max Liquid Temperature: 180°F (82°C)
- Prime: Self-priming to 9.0 ft vertical; max inlet pressure 30 PSI (2.1 Bar)
- Ports: 3/8"-18 NPT female
- Net Weight: 4.5 lbs (2.0 kg)
- Duty Cycle: Continuous
- Bypass: 145 PSI max
- Max Pressure: 145 PSI
- Amp Draw: 7.5A @ 140 PSI
- Part Number: 557-100
Compatible with water/methanol mixes up to 50% methanol. If an extra injector driver output isn't available (such as on an HP ECU driving 8 injectors), Holley P/N 554-115 can be used with a low-side PWM output instead.
FAQ
What systems does this pump work with?
It's built for use with Holley HP and Dominator EFI systems' integrated water/methanol injection control.
What's the maximum methanol mix it supports?
All components are designed to handle up to a 50% methanol mix.
What if I don't have a spare injector driver output for the solenoid?
You can use Holley P/N 554-115, which can be driven by a low-side PWM output instead.

