Nissan RB20 / RB25 / RB26 & SR20 76-Pin Ecumaster EMU Classic ECU & Pre-Built Plug-and-Play Adaptor

Nissan RB20 / RB25 / RB26 & SR20 76-Pin Ecumaster EMU Classic ECU & Pre-Built Plug-and-Play Adaptor

The Nissan RB20 / RB25 / RB26 & SR20 76-Pin Ecumaster EMU Classic ECU & Pre-Built Plug-and-Play Adaptor Kit is designed to give compatible Nissan RB and SR engine applications the benefits of standalone engine management without the usual wiring work associated with a full standalone ECU installation.

This kit includes an Ecumaster EMU Classic ECU and a pre-built, ready-to-fit plug-and-play adaptor, allowing the Ecumaster ECU to connect to the compatible factory Nissan 76-pin engine loom.

The adaptor is designed for Nissan RB20, RB25, RB26, and SR20 applications using the compatible 76-pin ECU connector. It allows complete control and use of the Ecumaster EMU Classic while keeping installation cleaner and more straightforward.

It is also compatible with the MFD on R34 GT-R models, helping retain important factory display functionality where correctly configured.

Key Features

Designed for Nissan RB & SR Engines
Suitable for compatible Nissan RB20, RB25, RB26, and SR20 engine applications using a 76-pin ECU connector.

76-Pin Plug-and-Play Adaptor
Designed to connect the factory Nissan 76-pin loom to the Ecumaster EMU Classic ECU.

Ecumaster EMU Classic ECU Included
Supplied with the Ecumaster EMU Classic standalone ECU for programmable engine management control.

Pre-Built Plug-and-Play Adaptor Included
Supplied as a complete, ready-to-fit adaptor, not loose connectors and wires.

Uses the Factory Engine Loom
Allows the Ecumaster ECU to connect to the compatible factory Nissan engine wiring loom, reducing the need for a full custom rewire.

R34 GT-R MFD Compatibility
Compatible with the MFD on R34 GT-R models where correctly installed and configured.

Standalone ECU Control Without the Wiring Hassle
A clean plug-in solution for customers wanting more control, tuning flexibility, and motorsport functionality from their RB or SR engine setup.

Optional Bosch LSU 4.2 Lambda Upgrade
A Bosch LSU 4.2 wideband lambda sensor and matching connector can be added as an optional extra if required.

Ecumaster EMU Classic Specification

The Ecumaster EMU Classic is a proven standalone engine management system designed to control fuel, ignition, boost, and auxiliary systems on a wide range of engines.

Key EMU Classic features include:

• Built-in 4 bar MAP sensor
• Built-in Bosch LSU 4.2 wideband lambda controller
• Bosch LSU 4.2 wideband sensor support
• Flex fuel support
• Launch control
• Flat shift / gear cut
• Traction control strategies
• Boost control
• Knock control
• Closed-loop fuel control
• Closed-loop boost control
• Sequential injection support
• Configurable inputs and outputs
• Motorsport functions including anti-lag, pit limiter, and map switching
• USB tuning connection
• Windows-based tuning software
• CAN bus communication with additional module
• Drive-by-wire throttle support with additional module where applicable

Optional Lambda Upgrade

An optional Bosch LSU 4.2 wideband lambda sensor and matching connector can be added to this kit if required.

Adding the lambda option allows the Ecumaster EMU Classic to use wideband lambda feedback for accurate air/fuel ratio monitoring and closed-loop fuel control, making it a useful upgrade for tuned Nissan RB and SR builds.

Kit Includes

• 1 × Ecumaster EMU Classic standalone ECU
• 1 × Nissan RB20 / RB25 / RB26 / SR20 76-pin pre-built plug-and-play adaptor

Optional Extras

• Bosch LSU 4.2 wideband lambda sensor
• Matching lambda connector
• Additional sensors or wiring by request

Suitable Applications

• Nissan RB20 engine applications with 76-pin ECU connector
• Nissan RB25 engine applications with 76-pin ECU connector
• Nissan RB26 engine applications with 76-pin ECU connector
• Nissan SR20 engine applications with 76-pin ECU connector
• Nissan Skyline RB standalone ECU conversions
• Nissan Silvia / 200SX / 180SX SR20 standalone ECU conversions where using the compatible 76-pin ECU connector
• Nissan R34 GT-R applications requiring MFD compatibility
• Turbocharged RB and SR builds
• Fast road cars
• Drift cars
• Track cars
• Motorsport builds
• Engine swaps using compatible Nissan RB/SR 76-pin looms

Important Notes

• Please confirm your vehicle, engine type, and ECU connector before ordering
• This listing is for the Ecumaster EMU Classic ECU and 76-pin adaptor kit
• Supplied with a pre-built, ready-to-fit plug-and-play adaptor, not loose connectors and wires
• R34 GT-R MFD compatibility depends on correct installation and configuration
• Bosch LSU 4.2 wideband lambda sensor and connector are optional extras and are not included unless selected
• Professional installation and mapping are strongly recommended
• A base map may require adjustment before use
• Final calibration should be carried out by a qualified mapper
• Some factory functions depend on vehicle specification, wiring, and final ECU configuration
• Some features may require additional wiring, sensors, or modules
• CAN and drive-by-wire functionality on EMU Classic may require additional modules where applicable

Lead Time Note

Please note there may be a 5–7 working day lead time if the adaptor needs to be built to order. We will confirm availability and build status after purchase where required.

Motorsport Use Notice

This product is intended for motorsport, competition, and off-road use where permitted. Please ensure the product is suitable for your intended application and complies with any relevant rules, regulations, or emissions requirements before use.