HOLLEY HY-550-540 EFI XFLOW
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Supports up to 800HP naturally aspirated & 690HP boosted!
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Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
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Simple Calibration Wizard (Answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
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Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
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High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
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Flows 900CFM, making it perfect for high rpm N/A engine combinations
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Compatible with Draw through or Blow through forced induction applications
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2.5Bar MAP Sensor
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Integrated ignition timing control
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Built in Single stage progressive nitrous control
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User friendly Boost Control with handheld adjustability
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Programmable Target Air Fuel Ratios per Boost level
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Advanced boost control available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time.
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Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
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Six Programmable Ground Outputs
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One +5v Reference Output - +5V Power Supply for 0-5v Sensors
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One Sensor Ground – Ground supply for 0-5v Sensors
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Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
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Throttle body mounted ECU – no extra boxes to mount
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Requires an external fuel pressure regulator: P/N 12-848 up to 800 HP
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The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
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OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.
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Included 2.5” clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange