GM TPI and Holley Stealth Ram™, Includes NTK Oxygen Sensor

Part Number: 550-601N

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.

Features and Benefits

• FEATURES
• Data Logger. Scalable axes, Smoothing, Multiple graph view ability, Pre-defined notes fields and many more
• Sealed automotive and marine grade connectors
• Advanced idle, closed loop, and enrichment strategies allow for very stable operation
• Traction Control - Power reduction via timing, nitrous percentage or boost (Requires Davis Technologies Holley Module)
• Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
• NEW V2 SOFTWARE FEATURES
• Two channel knock control sensor Inputs for both one or two wire knock sensors
• Plug and Play control of factory GM 24x and 58x LSx engines
• Strip Chart Real-Time Data Viewer
• Progressive control based on time, RPM, or boost, requires part # 554-111
• 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
• Full timing retard/control configurability per stage based on RPM or time
• Dedicated fuel and oil pressure inputs
• 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
• Can be configured “Wet” or “Dry” with closed loop feedback
• 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
• 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
• Internal data-logging standard with a huge 2GB of memory
• Configurable User Password Protection
• 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.
• ECU is fully potted and can be mounted in the engine compartment or interior
• Integrated water/methanol injection control
• Custom settings can be configured to allow many other applications
• Speed density, Alpha-N, or combination fueling strategies
• 4 Stage progressive nitrous control
• 4 Stage nitrous oxide control
• 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
• Works with 4, 6, 8 cylinder engines
• Self-tuning fuel table strategy greatly simplifies tuning process
• Fully featured nitrous control eliminates the need for a separate nitrous controller device
• “Quick Start” fueling for all engines
• Turbo boost control
• Allows for use of common OEM sensors as well as customer sensor calibration input
• “Quick Start” ignition and fueling strategy for LS x Engines
• Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• Lean or rich safety cutoff
• Controls both stepper and PWM Idle Air Control (IAC) motors
• Fuel Map and Learn Function Smoothing
• 1-5 Bar MAP sensor capability
• Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control. Boost launch builder, Over-boost safeties, Boost scramble
• Fully Configurable lap top Gauge Panel
• Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
• Option for VE based fueling strategy

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.