Holley 550-606 HP EFI ECU & Harness Kits

Universal FORD V8 Multi-Point Fuel Injection, Includes Bosch Oxygen Sensor, and Ford V8 Injector Harness.

Part Number: 550-606

Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.

Features and Benefits

• Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
• Custom settings can be configured to allow many other applications
• Plug and Play control of factory GM 24x and 58x LSx engines
• Controls both stepper and PWM Idle Air Control (IAC) motors
• Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• Internal data-logging standard with a huge 2GB of memory
• 4 Stage nitrous oxide control
• Dedicated fuel and oil pressure inputs
• Progressive control based on time, RPM, or boost, requires part # 554-111
• Fully featured nitrous control eliminates the need for a separate nitrous controller device
• Two channel knock control sensor Inputs for both one or two wire knock sensors
• Full timing retard/control configurability per stage based on RPM or time
• Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process.
• Eight channel Distributorless Ignition (DIS)outputs capable of directly driving “Smart” ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
• Optional 5.7” full-color touchscreen LCD allows easy on-the-fly tuning,data-logging or can be used as an easy to see graphical gauge panel
• 4 Stage progressive nitrous control
• Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
• Allows for use of common OEM sensors as well as customer sensor calibration input
• Lean or rich safety cutoff
• Sealed automotive and marine grade connectors
• Can be configured “Wet” or “Dry” with closed loop feedback
• ECU is fully potted and can be mounted in the engine compartment or interior
• 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
• Turbo boost control
• Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tu
• Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
• Integrated Water/Methanol injection control
• Works with 4, 6, 8 cylinder engines
• Speed density, Alpha-N, or combination fueling strategies
• Advanced idle, closed loop, and enrichment strategies allow for very stable operation
• 1-5 Bar MAP sensor capability
• Self-tuning fuel table strategy greatly simplifies tuning process

If utilizing FORD OEM TPS and IAC sensor, must wire in Ford connector (not supplied) ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS. Software and firmware updates can be downloaded here for free.