Take control of your LS engine with Terminator X Max. Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price.
Terminator X Max features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Part number 550-928 also has 4L60E or 4L80E Transmission control and Drive-By Wire Throttle Body control. Terminator X Max comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. The 3.5" touch screen LCD handheld contains an easy to use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy-to-use software suite that allows full laptop access for advanced users. Whether you are building a budget beater or a boosted race car, Terminator X MAX has the features and technology you need at a price that won't break the bank.
FEATURES
- Designed for GM LS 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and 4L60E/4L80E transmissions, Drive-by wire throttle body control, and EV6 Injectors
- Real-time fuel map learn takes the guess work out of tuning your base fuel table
- High Impedance Injector Drivers will safely power most Stock LS injectors and Holley EFI Injectors. Injector support chart provided in the instructions (will not control Low Impedance Injectors)
- All of the new Terminator X Max systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
- On-Board 1bar MAP sensor is perfect for N/A or Nitrous engine combos. If your combination requires a 2+Bar, we recommend GM 12592525 and our adapter part number 558-416
- MAP Sensor vacuum hose adapters (1/8th - 1/4 and 3/16ths)
- 4 Inputs - 12v, Ground, 5v, and Frequency for things such as additional pressure sensors, activation triggers for nitrous activation, or a trans brake
- 4 Outputs - Ground, PWM - for accessories such as fans, boost control, nitrous control, IAC Kit, and more
- Boost Control - Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control - Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables - 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety
- On-Board Diagnostic LEDS for ECU Power - Engine Run - Wideband Status - TPS Calibration - Crank Signal -Cam Signal allow you to identify any critical engine issues at a glance
- The included 3.5" Touchscreen Handheld contains a calibration wizard that allows you to quickly build a base tune for any LS engine. Additionally the handheld provides internal data-logging and a fully customizable gauge display
- The compact ECU size allows you to mount it virtually anywhere, remember, diagnostic LEDS must face up
- Plug and play compatible with multiple Holley EFI accessories including our gauges, shift lights, various modules, and digital and pro dashes (Holley P/N's 553-106, 553-111, and 553-112)
- Free EFI Tuning Software for complete control of your Terminator X power plant
- Recommended Pedal part number - 10379038
- Includes: 58x/4x 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 Oxygen Sensor - I/O Harness
SPECS
Accelerometer Support	Yes
Boost Control	Yes
Brand	Holley EFI
CAN-BUS Support	Yes
Category	Air and Fuel Delivery
Coil Per Cylinder Ignition Support	Yes
Crank Reluctor	58x
Datalogging Support	Yes
Distributor Included	No
Drive-By-Wire	Yes
Dry Nitrous Control	Yes
e85 Support	Yes
EGT Support	Yes
Emission Code	3
Forced Induction Support	Yes
Fuel Filter Included	No
Fuel Hose Included	No
Fuel Injectors Included	No
Fuel Pressure Regulator Included	No
Fuel Pump Included	No
Grade Type	Performance
Handheld Included	Yes
Idle Air Control Motor Included	No
Ignition Timing Control	Yes
Ignition Type	GM LS 58x
Individual Cylinder Fuel Corrections	Yes
Injector Connector	USCAR (EV6)
Intake Manifold Included	No
Knock Retard Support	Yes
MAP Sensor	1bar
Mounting Hardware Included	No
Multi-Stage Nitrous Control	Yes
Product Type	EFI System
Progressive Nitrous Control	Yes
Self-Tuning	Yes
Terminator LS Options	Fuel, Spark, Drive-by-Wire, Transmission
Throttle Position Sensor Included	No
Transmission	4L60E/4L80E
User-Tuneable	Yes
Wet Nitrous Control	Yes
UPC	090127060902
Part Number	550-928
EMISSIONS
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
TECH RESOURCES
Wiring Diagram
Instructions - Terminator X Max Measurements - Top View.jpg
Instructions - crankid1978.png
Instructions - Terminator X Max Measurements - Side View.jpg
Instructions - Terminator X and X Max Parts Guide - 199R11967 9-3-2020.pdf
Instructions - Terminator X MPFI Fuel Injection System - 199R11956 1.14.25.pdf
Instructions - injectorid1978.png
Instructions - Terminator X MPFI Fuel Injection System - 199R11760 1.14.25.pdf
Not recommended for 4x4 applications with electronic transfer cases. Not compatible with 4L6X transmissions from model year 1995 or before due to year-by-year changes in converter lockup and downshift strategy. ECU is not recommended for marine applications, but can be used on off-road applications as long as you choose a safe location, keep it dry, protect from heat, and ensure proper wiring management.
WARRANTY INFORMATION
Holley Brand Warranties