This Holley Terminator X kit provides plug-and-play engine control for GM Gen V LT engines (LT1, L83 and L86), including direct injection and VVT support. Every Gen V LT Terminator X kit includes an external gasoline direct injection (GDI) controller that runs the factory injectors, the factory variable valve timing and the factory fuel pumps. This is the late version, for engines whose fuel pressure sensor (behind the intake manifold) has a 3-pin connector.
Key Features:
- Plug-and-play control for GM Gen V LT engines (LT1, L83 and L86) including GDI and VVT support
- External GDI controller included for the factory DI injectors, VVT and factory fuel pumps
- Included engine harness plugs directly into the factory LT DI injector sub harness
- OEM injectors supported, with part numbers provided in the handheld wizard or software
- Real-time fuel map learn takes the guesswork out of tuning the base fuel table
- Genuine Bosch LSU 4.9 wideband control (not compatible with LSU 4.2 oxygen sensors)
- Built-in 1-bar MAP sensor with vacuum hose adapters (1/8, 1/4 and 3/16 in.); for boost it can be disabled in favor of an external LT MAP sensor, with the connector terminated in the harness
- 4 programmable inputs (12V, ground, 5V and frequency), with fuel and oil pressure inputs pre-terminated
- 4 programmable outputs (ground and PWM) for electric fans, boost control, nitrous control, IAC kits and more
- Boost control by time, gear, RPM and speed, with boost safeties
- Single-channel nitrous control, wet or dry, progressive or non-progressive, with rich/lean safeties and a closed-loop AFR target
- Advanced tables: four 1D, one 1D per-gear, four 2D and one 2D per-gear
- On-board diagnostic LEDs for ECU power, engine run, wideband status, TPS calibration, crank and cam signal, VVT status, pump control and DI injectors
- 3.5 in. handheld with a step-by-step calibration wizard and integrated data logging to its SD card
- Well suited to swapping a late-model Gen V LT engine into a vintage vehicle
- Free Holley EFI tuning software gives advanced users full laptop access
Specifications:
- Engine: GM Gen V LT (LT1, L83, L86)
- Injection: Direct injection (factory DI injectors via included GDI controller)
- DI Fuel Rail Pressure Sensor: Late (3-pin connector)
- Throttle Control: No drive-by-wire control
- Transmission Control: None
- MAP Sensor: 1-bar, internal
- Handheld: 3.5 in. touchscreen
- Color: Black
- Part Number: 550-1601
FAQ
What engines does the 550-1601 kit fit?
GM Gen V LT engines (LT1, L83 and L86) with the late 3-pin fuel pressure sensor.
How do I tell if my LT engine is early or late?
Check the fuel pressure sensor behind the intake manifold. Early sensors have a 4-pin connector and late sensors have a 3-pin connector. This kit is the late version.
Does it control the factory direct injectors?
Yes. The kit includes an external GDI controller that runs the factory injectors, the factory VVT and the factory fuel pumps.
Does it include drive-by-wire or transmission control?
No. Holley lists this kit without drive-by-wire or transmission control.
Is a handheld included?
Yes. A 3.5 in. handheld with a step-by-step calibration wizard and data logging to its SD card is included.
