Terminator X Max extends Holley EFI's standalone engine control to GM LS1/LS6 engines with drive-by-wire throttle body control and 4L60E/4L80E transmission control built in. It replaces a junkyard ECU with real-time fuel learn and race-proven tuning technology, and uses a USB/CAN tuning cable with the free Terminator X software for setup.
Key Features:
- Designed for GM LS1/LS6 engines with 24x crank reluctor, EV6 injectors, drive-by-wire throttle body, and 4L60E/4L80E transmission control
- Real-time fuel map learn removes the guesswork from tuning the base fuel table
- High-impedance injector drivers safely power most stock LS and Holley EFI injectors
- Bosch LSU 4.9 wideband oxygen sensor included for accurate AFR feedback
- On-board 1-bar MAP sensor with vacuum hose adapters (1/8, 1/4, and 3/16 in.)
- 4 programmable inputs and 4 programmable outputs for fans, boost/nitrous control, IAC, and more
- Boost control strategies: vs. time, vs. gear, vs. RPM, vs. speed, plus boost safeties
- Single-channel wet or dry progressive nitrous control with rich/lean safeties
- Advanced tables: 4x 1D, 1x 1D per gear, 4x 2D, 1x 2D per gear for custom tuning needs
- On-board diagnostic LEDs for ECU power, engine run, wideband status, TPS/crank/cam signal
- Includes USB/CAN tuning cable; software includes multiple base calibrations for naturally aspirated or boosted engines
- Compact ECU mounts virtually anywhere (LEDs must face up)
- Plug-and-play compatible with Holley EFI gauges, shift lights, and dash accessories (P/N 553-106, 553-111, 553-112)
- Free EFI tuning software for full laptop control
- Recommended drive-by-wire pedal: P/N 10379038
Specifications:
- Engine: GM LS1/LS2/LS6
- Crank Reluctor: 24x
- Injector Connector: USCAR (EV6)
- Drive-By-Wire: Yes | Transmission Control: 4L60E/4L80E
- MAP Sensor: 1-bar, integrated
- Handheld Included: No, USB/CAN tuning cable included instead
- Includes: 24x LS Engine Main Harness, EV6 Injector Harness, DBW Throttle Body Harness, 4L60E/4L80E Transmission Control Harness, Terminator X Max ECU, ECU Main Power Harness, Bosch LSU 4.9 Wideband O2 Sensor, I/O Harness
- Part Number: 550-934T
Not recommended for 4x4 applications with electronic transfer cases. Not compatible with 4L6X transmissions from model year 1995 or earlier due to year-by-year changes in converter lockup and downshift strategy. Not recommended for marine applications, but can be used off-road in a dry, protected, heat-shielded location with proper wiring management.
FAQ
What does the 550-934T control besides fuel and spark?
It adds drive-by-wire throttle body control and 4L60E/4L80E automatic transmission control on top of standard Terminator X Max engine control.
Does this kit include a handheld for tuning?
No, this kit includes a USB/CAN tuning cable instead of the 3.5 in. handheld, and requires the free Terminator X software for setup.
Will this work with a 4x4 vehicle?
It's not recommended for 4x4 applications with electronic transfer cases.
What transmissions are NOT supported?
4L6X transmissions from model year 1995 or earlier are not compatible due to converter lockup and downshift strategy changes.
What throttle pedal is recommended?
Holley recommends pedal part number 10379038 for drive-by-wire installations.
