What's Terminator X?
Holley's Terminator X family of EFI Systems are standalone engine management systems that closely replicate some of Holley's most advanced engine management systems but at a much more budget-friendly price. This PDF gives a highly detailed comparison of the Terminator X and X Max to engines built using the Holley HP and Dominator ECUs. To summarize, Holley was able to leave out some features found to be less-necessary by the majority of users and, in doing do, slash the price of a full-featured EFI System by half. If you're switching your carbureted engine to multi-point EFI or are swapping a fuel-injected engine into your ride and need to stay on a budget, this is the EFI system for you.
Here are some of the features that are included in each Terminator X kit:
- Eight High-Impedance Injector Drivers
- Configuration, monitoring and data logging via included 3.5-inch touchscreen LCD display*
- Configuration and monitoring via Terminator PC software (free download) and optional CAN-to-USB adapter cable
- Four configurable inputs and outputs
- Boost Control**
- Single-Stage Progressive Nitrous Control**
- Staging Assist**
- Transmission Controls***
- Drive-By-Wire Control***
- *Except "Tuner" versions
- **Requires hardware not included with Terminator X system to implement
- ***X Max Version Only
Different Terminator X EFI Systems For Different Applications
Yes, there are quite a few different Terminator X EFI System--nearly 100 with more on the way. All Terminator X systems include either a Terminator X or Terminator X Max ECU. The Terminator X Max ECU provides connectivity for transmission control and drive-by-wire harnesses and is included only in those kits that require one or both of these features. Both ECUs include an on-board 1-BAR MAP sensor or you can add an external MAP sensor for boosted applications. On-Board Diagnostic LEDs display the status of ECU Power, Engine Run, Wideband Status, TPS Calibration, Crank Signal, and Cam Signal
In addition to the ECU the kit all Terminator X / X-Max systems include the following:
- ECU Power Harness
- Application-Specific Main Harness
- 3.5-inch Touchscreen LCD Display with Setup Wizard app*
- Custom 4-input / 4-output harness pre-configured for two Electric Fans, A/C Kick, and A/C Shutdown
- Bosch LSU 4.9 Wideband O2 Sensor
- *Except "Tuner" versions
Unique To The Terminator X MPFI Kit for GM LS1 & LS6 Engines
Holley provides many features unique to the GM LS1 & LS6 Engine that make this EFI system a breeze to install and configure and powerful to operate.
- Direct-fit connectors for factory sensors
- Connector for factory ignition coil sub-harness
- Transmission harness for GM 4L60E, 4L65E, early 4L70E, 4L80E, and 4L85E transmissions*
- Drive-By-Wire harness for GM LS DBW throttle body*
- Choose from EV1 or EV6 injector harness
- *Transmission Control Versions Only
- *Drive-By-Wire Control Versions Only
Choose From Eight Different Versions of the Terminator X MPFI Kit for GM LS1 & LS6 Engines
Part Number | Manuf. | Engine | ECU | Injector Harness | Transmission Control | Drive-By-Wire Control |
---|---|---|---|---|---|---|
550-903 | GM | LS1 & LS6 Engine | X | EV1 | No | No |
550-909 | GM | LS1 & LS6 Engine | X | EV6 | No | No |
550-929 | GM | LS1 & LS6 Engine | X Max | EV1 | No | Yes |
550-932 | GM | LS1 & LS6 Engine | X Max | EV6 | No | Yes |
550-916 | GM | LS1 & LS6 Engine | X Max | EV1 | Yes | No |
550-919 | GM | LS1 & LS6 Engine | X Max | EV6 | Yes | No |
550-926 | GM | LS1 & LS6 Engine | X Max | EV1 | Yes | Yes |
550-934 | GM | LS1 & LS6 Engine | X Max | EV6 | Yes | Yes |
What is the "Tuner" Version?
When the Terminator X system is installed by a professional tuner they use the Terminator X Software to create a tune and do not require the setup wizard on the handheld display to build the initial configuration. The end user might then choose to upgrade to a higher level of dash or digital display and have no use for the handheld display that is included in the standard version. By opting for the Tuner Version, the 3.5-inch Handheld Touchscreen LCD Display is replaced with a CAN-to-USB harness. The difference in price can be either pocketed or used toward the purchase of the larger display.
What Else Will I Need?
Required: EFI Fuel System with
- EFI Fuel Pump (Many great options here)
- Pre- and Post-Pump Filters
- Fuel Pressure Regulator
- Associated Hose, Hose Ends, Clamps, Adapters, Etc.
Recommended:
- Fuel Pressure Gauge or
- Fuel Pressure Transducer
- CAN-to-USB Adapter Harness* (for laptop tuning. Download Terminator X Software here.)
- CAN Bus Y-Cable
- *Included in "Tuner" versions
Not Sure? Review this product documentation before you buy!
Quickstart Manual
Holley Terminator X and X Max EFI Systems
Tuning Manual
Holley Terminator X and X Max EFI Systems
Installation Manual
Holley Terminator X and X Max EFI Systems for GM LS & Truck Engines
Wiring Diagram
Holley Wiring Harness for GM LS1, LS6, and 97-07 Truck Engine
ECU | |
Boost Control | Yes (Requires Additional Hardware) |
DIS Outputs | Eight |
Family | Terminator X |
Fueling Strategy | Speed Density, Alpha-N, or Combination |
Includes Power Harness | Yes |
Injector Drivers | Eight High Impedance |
Internal Datalogging | No. All datalogging done via external device (handheld, laptop, digital display.) |
Nitrous Control | Yes (Requires Additional Hardware) |
Number of Cylinders | Eight |
User Configurable I/O | Yes |
User-Selectable MAP Storage | No |
Water-Methanol Control | No |
Displays And Controllers | |
Auto Brightness | No |
CAN Bus Capable | Yes (Specific to Holley ECUs Only) (Except Tuner Versions) |
Case/Bezel Finish | Black (Except Tuner Versions) |
Configurable | Monitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, drive-by-wire data, and more. (Except Tuner Versions) |
Data Logging | Yes (Except Tuner Versions) |
Display Type | LCD (Except Tuner Versions) |
Functions | Setup, Monitor, Tuning (Except Tuner Versions) |
Gauge/Display Size | 3.5 Inch Rectangular (Except Tuner Versions) |
Internal Storage | Yes (SD Card) (Except Tuner Versions) |
Touchscreen | Yes (Except Tuner Versions) |
Harnesses | |
Harness Type | Power Harness, Main Harness, Injector Sub-Harness, I/O Harness, Ignition Adapter. Transmission Harness (Transmission Control Versions Only), DBW Harness (DBW Versions Only) |
Terminated | Yes |
Crank Timing | |
Sensor Harness Included | Direct-Fit Connector to Factory Crank Timing Pickup |
Sensors | |
Type | ECU-mounted 1 BAR MAP, Wideband O2 |
General | |
Also Included | I/O Harness |
Application | GM LS1 & LS6 Engine |
Emission Code | 3 - This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles. |
Unit of Sale | Kit |