{"product_id":"holley-efi-hp-efi-ecu-harness-kits-550-604","title":"Holley EFI HP EFI ECU \u0026 Harness Kits - 550-604","description":"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.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLean or rich safety cutoff\u003c\/li\u003e\n\u003cli\u003e1-5 Bar MAP sensor capability\u003c\/li\u003e\n\u003cli\u003eInternal data-logging standard with a huge 2GB of memory\u003c\/li\u003e\n\u003cli\u003eDedicated fuel and oil pressure inputs\u003c\/li\u003e\n\u003cli\u003eControls both stepper and PWM Idle Air Control (IAC) motors\u003c\/li\u003e\n\u003cli\u003eSpeed density, Alpha-N, or combination fueling strategies\u003c\/li\u003e\n\u003cli\u003eAllows for use of common OEM sensors as well as customer sensor calibration input\u003c\/li\u003e\n\u003cli\u003eWorks with 4, 6, 8 cylinder engines\u003c\/li\u003e\n\u003cli\u003eEight 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\u003c\/li\u003e\n\u003cli\u003e4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use\u003c\/li\u003e\n\u003cli\u003eSealed automotive and marine grade connectors\u003c\/li\u003e\n\u003cli\u003eTwo channel knock control sensor Inputs for both one or two wire knock sensors\u003c\/li\u003e\n\u003cli\u003e4 Stage progressive nitrous control\u003c\/li\u003e\n\u003cli\u003eIntegrated Water\/Methanol injection control\u003c\/li\u003e\n\u003cli\u003eEight 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\u003c\/li\u003e\n\u003cli\u003eSelf-tuning fuel table strategy greatly simplifies tuning process\u003c\/li\u003e\n\u003cli\u003eFully featured nitrous control eliminates the need for a separate nitrous controller device\u003c\/li\u003e\n\u003cli\u003eUnique lb\/hr based fueling strategy greatly simplifies and commonizes tuning\u003c\/li\u003e\n\u003cli\u003eECU is fully potted and can be mounted in the engine compartment or interior\u003c\/li\u003e\n\u003cli\u003eAdvanced idle, closed loop, and enrichment strategies allow for very stable operation\u003c\/li\u003e\n\u003cli\u003eIndividual cylinder fuel and spark control allows you to unlock your engine’s potential\u003c\/li\u003e\n\u003cli\u003eUses 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\u003c\/li\u003e\n\u003cli\u003e4 Stage nitrous oxide control\u003c\/li\u003e\n\u003cli\u003eFull timing retard\/control configurability per stage based on RPM or time\u003c\/li\u003e\n\u003cli\u003eProgressive control based on time, RPM, or boost, requires part # 554-111\u003c\/li\u003e\n\u003cli\u003eTurbo boost control\u003c\/li\u003e\n\u003cli\u003eIntegrated single channel wide band oxygen sensor control.  Works with NTK or Bosch sensors\u003c\/li\u003e\n\u003cli\u003eCan be configured “Wet” or “Dry” with closed loop feedback\u003c\/li\u003e\n\u003cli\u003eIgnition 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\u003c\/li\u003e\n\u003cli\u003eOptional 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\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Universal V8 Multi-Point Fuel Injection, Includes Bosch Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccelerometer Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoost Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAN-BUS Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Per Cylinder Ignition Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDatalogging Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry Nitrous Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ee85 Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEGT Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForced Induction Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Filter Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Hose Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Injectors Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Pressure Regulator Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Pump Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Type:\u003c\/strong\u003e Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Timing Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Coil - (No Timing Control), Ford TFI, GM HEI Small Cap, Holley Dual Sync Distributor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual Cylinder Fuel Corrections:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInjector Connector:\u003c\/strong\u003e Jetronic \/ Minitimer (Bosch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Manifold Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnock Retard Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Stage Nitrous Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Fuel Injection Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e HP EFI Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgressive Nitrous Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Tuning:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle Position Sensor Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraction Control Support:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Tuneable:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWet Nitrous Control:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cp\u003eECU is   certified to ISO 8846, SAE J1171 \u0026amp; United States Coast Guard Requirements   for Ignition Protection \u0026amp; 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\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":49715250102510,"sku":"HLY-550-604","price":2749.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/02cf5f0256efd8c51c4d4694adc11593d154bb96.jpg?v=1791567417","url":"https:\/\/elmosspeedshop.com\/products\/holley-efi-hp-efi-ecu-harness-kits-550-604","provider":"Elmo's Speed Shop","version":"1.0","type":"link"}