Terminator X Max is a self-learning Holley EFI engine management kit for domestic V8 engines, such as conventional pushrod Chevrolet and Chrysler engines. It replaces a factory or junkyard controller with real-time fuel learn, high-impedance injector drivers and Holley EFI tuning software. This version is configured for an EV1 injector harness and drive-by-wire throttle body control. A 3.5 in. touchscreen handheld with a calibration wizard is included for setup, tuning and gauge display.
Key Features:
- Built for domestic V8 engines, such as conventional pushrod Chevrolet and Chrysler engines
- Real-time fuel map learning builds and refines the base fuel table
- High-impedance injector drivers run most stock injectors and Holley EFI injectors; low-impedance injectors are not supported
- Bosch LSU 4.9 wideband oxygen sensor control for accurate AFR readings and closed-loop tuning
- Built-in 1-bar MAP sensor suited to naturally aspirated or nitrous combinations
- For boosted use, the internal MAP sensor can be disabled and an external MAP sensor connected to the pre-terminated harness connector
- 4 programmable inputs (12V, ground, 5V, frequency) and 4 outputs (ground, PWM) for sensors, fans, boost and nitrous control, IAC kits and more
- Boost control by time, gear, RPM or speed, with boost safeties
- Single-channel wet or dry nitrous control, progressive or non-progressive, with rich/lean safeties and closed-loop AFR target
- Advanced 1D and 2D custom tables, including per-gear tables, for uses such as a flex fuel offset or a fuel or oil pressure safety
- On-board diagnostic LEDs for ECU power, engine run, wideband status, TPS calibration, crank signal and cam signal
- 3.5 in. touchscreen handheld with calibration wizard, internal data logging and customizable gauge display
- Plug-and-play ignition capability with Holley Dual Sync and HyperSpark distributors (HyperSpark requires adapter 558-323)
- Compact ECU can be mounted almost anywhere, with the diagnostic LEDs facing up
- Plug-and-play with Holley EFI gauges, shift lights, modules and digital/pro dashes (P/N 553-106, 553-111, 553-112)
- Free Holley EFI tuning software provides full laptop access for advanced users
- Recommended GM throttle pedal: P/N 10379038
Specifications:
- Engine: Universal domestic V8 (MPFI)
- Injector Connector: Jetronic/Minitimer (Bosch EV1)
- Throttle Control: Drive-by-wire (DBW)
- Transmission Control: None
- MAP Sensor: 1-bar, internal
- Handheld Included: Yes, 3.5 in. touchscreen
- Part Number: 550-950
Designed to work with GM throttle body P/N 12570790 and 12580760 and GM throttle pedal P/N 10379038. Not recommended for marine use; it can be used off-road when mounted in a safe, dry location protected from heat with proper wiring management. Mount the ECU with the LEDs facing up.
FAQ
What engines does the 550-950 fit?
It is built for domestic V8 engines, such as conventional pushrod Chevrolet and Chrysler engines.
Is a handheld display included?
Yes. A 3.5 in. touchscreen handheld with a calibration wizard is included for setup, tuning and gauge display.
Does it control the throttle body and transmission?
It provides drive-by-wire throttle body control. It does not include transmission control.
What fuel injector connector does the kit use?
The injector harness uses the Jetronic/Minitimer (Bosch EV1) connector.
Which throttle pedal is recommended?
Holley recommends GM throttle pedal P/N 10379038 for drive-by-wire setups.
