MaxxECU RACE Premium ECU Package w/Flying Lead Harnesses and Bosch 4.2 WBO

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, while the two-harness architecture provides access to electronic throttle, dual knock inputs, eight thermocouple channels, additional analog and digital inputs, high-side outputs, and motor-control outputs.

This Premium package includes both MaxxECU RACE flying-lead harnesses, a genuine Bosch LSU 4.2 wideband oxygen sensor, the matching sensor connector, communication hardware, and the principal accessories required to begin a custom installation. Unlike the RACE Standard package, the Premium package provides access to the ECU’s complete connector allocation without requiring Harness 2 to be purchased separately.

Key Features

• Up to eight cylinders with fully sequential fuel injection and ignition

• Up to 12 cylinders using non-sequential fuel and wasted-spark ignition 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

• Eight additional analog inputs:

  • Six 0–5 V inputs

  • Two 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 3-meter flying-lead harness for ECU Connector 1

• 1787 — MaxxECU RACE flying-lead 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 1- through 12-cylinder, two- or four-stroke engines

• 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:

  • VR or digital Hall-effect signal support

  • 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:

  • VR

  • Hall effect

  • Switch inputs

• Two knock-sensor inputs

• Eight Type-K or Type-N thermocouple inputs:

  • Measurement range up to approximately 1,200°C or 2,200°F

  • 50 Hz sampling rate

• 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

• Nine configurable low-side general-purpose outputs:

  • Eight outputs rated at up to 2 A

  • One 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

• Suitable for supported functions including:

  • Electronic-throttle control

  • Fuel-pump control

  • Cooling fans

  • Boost-control solenoids

  • Idle-control valves

  • Variable-cam solenoids

  • Nitrous control

  • Warning 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-control systems

  • MaxxECU expansion devices

  • OEM vehicle CAN 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. It is not supplied with an application-specific terminated engine harness.

• Product ID 1786 includes a Bosch LSU 4.2 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.

• Both RACE harnesses are included. Harness 2 provides the wiring required for electronic throttle, knock inputs, EGT inputs, additional analog and digital inputs, high-side outputs, and motor outputs.

• The included Harness 2 provides eight miniature thermocouple connectors for custom EGT-probe termination. The actual 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 setup in MTune.

• The ignition outputs do not directly drive conventional high-current ignition coils. Use coils with built-in igniters, a compatible external ignition module, or a CDI system.

• Supported direct-control automatic transmissions include selected:

  • GM 4L60E and 4L65E

  • GM 4L80E and 4L85E

  • Toyota A340E, A341E, and A650E

• Supported CAN-controlled transmission applications include selected:

  • BMW DCT

  • VAG DSG

  • Gen 1 ZF 8HP

• Gen 1 ZF 8HP control requires the appropriate MaxxECU transmission harness, compatible shifter hardware, transmission configuration, and CAN setup. These components are sold separately.

• Available inputs and outputs must be allocated around the requirements of the specific 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.