Holley EFI 550-604 - HP EFI ECU And Harness Kit

Holley EFI - 550-604

HP EFI ECU And Harness Kit; Universal V8 Multi-Point Fuel Injection; Incl. ECU/Harness; Incl. Bosch Oxygen Sensor;

Looking for a plug and play alternative for your stock or built late model factory 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.

• Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• 1-5 Bar MAP sensor capability
• Self-tuning fuel table strategy greatly simplifies tuning process
• Lean or rich safety cutoff
• Works with 4, 6, 8 cylinder engines
• Allows for use of common OEM sensors as well as customer sensor calibration input
• Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
• 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
• Can be configured “Wet” or “Dry” with closed loop feedback
• Internal data-logging standard with a huge 2GB of memory
• 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
• Integrated Water/Methanol injection control
• Speed density, Alpha-N, or combination fueling strategies
• Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
• Dedicated fuel and oil pressure inputs
• ECU is fully potted and can be mounted in the engine compartment or interior
• 4 Stage progressive nitrous control
• 4 Stage nitrous oxide control
• Full timing retard/control configurability per stage based on RPM or time
• Progressive control based on time, RPM, or boost, requires part # 554-111
• 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
• 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
• Controls both stepper and PWM Idle Air Control (IAC) motors
• Ignition Plug and Play with GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process. Custom settings can be configured to allow many other applications
• Fully featured nitrous control eliminates the need for a separate nitrous controller device
• Advanced idle, closed loop, and enrichment strategies allow for very stable operation
• 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 tuning precision unmatched in the industry
• Turbo boost control
• Sealed automotive and marine grade connectors
• Two channel knock control sensor Inputs for both one or two wire knock sensors