MaxxECU RACE Premium ECU Package with Complete Flying-Lead Wiring Harness and Bosch LSU 4.2 Wideband Sensor
Part Number: 1786
The MaxxECU RACE Premium package is a universal standalone engine-management system for applications requiring up to eight sequential fuel and ignition channels, electronic-throttle control, extensive sensor and auxiliary I/O, integrated wideband lambda, flex-fuel support, variable-cam control, CAN communications, and transmission-control capability.
RACE is well suited to V8 applications and more complex four-, five-, and six-cylinder combinations that require additional inputs, outputs, or control functions beyond the SPORT ECU. The eight injector and ignition channels support fully sequential operation on engines with up to eight cylinders.
The complete RACE flying-lead wiring harness is divided between the ECU’s Connector 1 and Connector 2 interfaces. Together, the two connector-specific harness sections provide access to the primary engine-management circuits, electronic throttle, dual knock inputs, eight thermocouple channels, additional analog and digital inputs, high-side outputs, and motor-control outputs.
This Premium package also includes a genuine Bosch LSU 4.2 wideband oxygen sensor, matching sensor connector, communication hardware, and the principal accessories required to begin a custom installation. It includes the ECU’s complete flying-lead harness rather than requiring the Connector 2 section to be purchased separately.
Key Features
• Up to eight cylinders with fully sequential fuel injection and ignition
• Up to 12 cylinders using manufacturer-supported wasted-spark strategies
• Eight peak-and-hold injector outputs supporting high- or low-impedance injectors
• Eight ignition outputs for smart coils, CDI systems, or external ignition amplifiers
• Integrated electronic-throttle control
• Built-in wideband lambda controller supporting Bosch LSU 4.2 and LSU 4.9 sensors
• Genuine Bosch LSU 4.2 wideband sensor included
• Built-in 400 kPa absolute MAP sensor, suitable for approximately 3 bar or 43.5 psi of boost
• Two crankshaft and camshaft trigger inputs supporting VR and digital signals
• Eight thermocouple inputs for Type-K or Type-N exhaust-gas-temperature sensors
• Two knock-sensor inputs
• Six additional 0–5 V analog inputs
• Two additional temperature inputs
• Four additional digital inputs supporting VR, Hall-effect, or switch signals
• Nine configurable low-side general-purpose outputs
• Two configurable 12 V high-side outputs
• Four bidirectional motor outputs for electronic throttle and other supported motor-control functions
• CAN bus for supported transmissions, expansion modules, displays, OEM vehicle communications, and OBD-II
• Built-in Bluetooth and USB communication
• Internal data logging at up to 1,000 Hz
• Flex-fuel, variable-cam, boost-control, traction-control, launch-control, anti-lag, nitrous-control, and engine-protection strategies
• MTune PC software for setup, tuning, diagnostics, and data analysis
Kit Includes
• MaxxECU RACE engine-control unit
• 871 — MaxxECU V1/RACE/PRO flying-lead wiring harness for ECU Connector 1
• 1787 — MaxxECU RACE flying-lead wiring harness for ECU Connector 2
• 107 — Genuine Bosch LSU 4.2 wideband oxygen sensor, Bosch 0 258 007 057
• Bosch LSU 4.2 sensor connector
• 924 — MaxxECU USB PC communication cable
• 949 — MaxxECU Bluetooth mobile antenna
• ECU connector and terminal hardware
• Push-lock-to-barb adapter for the internal MAP-sensor connection
• MAP-sensor hose and fitting kit
• Printed wiring diagram
• Printed quick-start guide
ECU Specifications
Engine Support
• Supports manufacturer-approved 1- through 12-cylinder, two- or four-stroke engine configurations
• Up to eight cylinders with fully sequential fuel injection and ignition
• Up to 12 cylinders using wasted-spark ignition
• Individual-cylinder fuel correction
• Injector staging
• Electronic-throttle and cable-throttle applications
• Variable valve timing, including supported VVTi and VANOS applications
• Flex-fuel operation
Trigger and Sensor Inputs
• Two primary trigger inputs supporting VR or digital Hall-effect signals
• Automatic trigger-level detection
• Dedicated trigger-signal processing
• Dedicated intake-air-temperature input
• Dedicated coolant-temperature input
• Dedicated throttle-position input
• Two additional temperature inputs
• Six additional 0–5 V analog inputs
• Four additional digital inputs supporting VR, Hall-effect, or switch signals
• Two knock-sensor inputs
• Eight Type-K or Type-N thermocouple inputs
• Thermocouple measurement range up to approximately 1,200°C or 2,200°F
• Thermocouple sampling rate of 50 Hz
• Built-in 400 kPa absolute MAP sensor
• Direct Bosch LSU 4.2 or LSU 4.9 wideband-sensor connection
Injector and Ignition Outputs
• Eight peak-and-hold injector outputs
• Up to 8 A per injector output
• Supports one or two high- or low-impedance injectors per output
• Eight 5 V ignition outputs
• Ignition outputs require smart coils, an external ignition amplifier, or a compatible CDI system
• No internal high-current ignition amplifiers
General-Purpose and Motor Outputs
• Eight configurable low-side outputs rated at up to 2 A
• One configurable low-side output rated at up to 5 A
• Two configurable 12 V high-side outputs rated at up to 2 A each
• Four bidirectional motor outputs rated at up to 2 A each
• Supports electronic-throttle control, fuel pumps, cooling fans, boost-control solenoids, idle-control valves, variable-cam solenoids, nitrous control, warning lights, and shift lights
Communications and Logging
• Single CAN bus
• USB connection for MTune
• Built-in Bluetooth for compatible mobile-device communication
• 8 MB internal logging memory
• Internal logging at up to 1,000 Hz
• CAN support for compatible transmission systems, MaxxECU expansion devices, OEM vehicle protocols, OBD-II communication, displays, and data devices
Electrical and Physical Specifications
• Supply-voltage range: 8–22 V
• ARM Cortex-M3 120 MHz main processor
• Separate processors for trigger, injector, and knock-signal processing
• Fuel and ignition calculations updated 2,000 times per second
• Ignition resolution: 0.1 degree
• Injector-time resolution: 0.001 ms
• Aluminum enclosure
• Dimensions: 155 × 195 × 40 mm, including mounting points and excluding connectors
• Weight: approximately 880 g
Application Notes
• This is a universal flying-lead ECU package, not an application-specific terminated engine harness.
• The complete RACE flying-lead wiring harness is supplied as separate Connector 1 and Connector 2 sections.
• Connector 1 provides the primary engine-management wiring.
• Connector 2 provides wiring for electronic throttle, knock inputs, EGT inputs, additional analog and digital inputs, high-side outputs, and motor outputs.
• Product ID 1786 includes a Bosch LSU 4.2 wideband sensor.
• Product ID 2251 is the corresponding RACE Premium package supplied with a Bosch LSU 4.9 sensor.
• The sensor type, connector, wiring, and MTune configuration must match.
• LSU 4.2 and LSU 4.9 sensors are not interchangeable without the correct connector and configuration.
• Eight miniature thermocouple connectors are included for custom EGT-probe termination.
• Type-K or Type-N EGT probes are sold separately.
• Knock sensors are not included.
• This is the standard aluminum-enclosure RACE ECU and is not identified as IP67 water-protected.
• Use a RACE H2O package where the ECU will be exposed to water, heavy moisture, or harsh environmental conditions.
• Full sequential operation is limited to engines with eight cylinders or fewer.
• Engines with more than eight cylinders require a different fuel and ignition strategy or a higher-channel ECU.
• Electronic-throttle operation requires a compatible throttle body, accelerator-pedal assembly, correct wiring, appropriate channel allocation, and application-specific MTune setup.
• The ignition outputs do not directly drive conventional high-current ignition coils.
• Direct transmission control is available for selected GM 4L60E, 4L65E, 4L80E, 4L85E and Toyota A340E, A341E, and A650E applications.
• CAN-controlled transmission support includes selected BMW DCT, VAG DSG, and Gen 1 ZF 8HP applications.
• Gen 1 ZF 8HP control requires the appropriate MaxxECU transmission harness, compatible shifter hardware, transmission configuration, and CAN setup.
• Available inputs and outputs must be allocated around the requirements of the engine, transmission, throttle, variable-cam, boost-control, and auxiliary systems.
Emissions and Competition-Use Notice
Unless specifically identified as emissions-legal for the applicable vehicle and application, this product is intended for sanctioned competition, off-road, or other non-emissions-controlled use. Installation or use on an emissions-controlled vehicle operated on public roads may violate federal, state, or local law. The purchaser and installer are responsible for confirming and maintaining compliance with all applicable emissions and vehicle-use regulations.