One Powerful System. Complete Engine Control. Built for Serious Performance.

The Haltech Nexus R3 VCU (Vehicle Control Unit) is an advanced standalone engine management system designed for high-performance street cars, dedicated race cars, engine swaps, and custom vehicle builds.

Unlike traditional standalone ECUs, the Nexus R3 combines engine management, power distribution, wideband oxygen sensor control, onboard data logging, and wireless connectivity into one integrated system.

Whether you’re building a turbocharged Honda K-Series, boosted GM LS, Nissan RB/JZ-powered race car, or a custom V8 application, the Nexus R3 delivers the flexibility and control needed to manage demanding engine combinations.

No separate power distribution module required for supported loads. No unnecessary collection of standalone controllers. One integrated vehicle management solution.

Designed for engines with up to 8 cylinders or 4 rotors, the Nexus R3 offers advanced tuning capabilities, extensive sensor integration, and motorsport-specific control strategies.

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🚀 Why Choose the Haltech Nexus R3?

Traditional standalone ECU installations often require multiple independent components to manage the engine, electrical accessories, wideband sensors, and data logging.

The Nexus R3 simplifies this process by combining several critical systems into a single programmable platform.

Five Powerful Systems in One

✅ Standalone Engine Management – Full control over fuel injection, ignition timing, boost, and engine operating strategies.

✅ Integrated Power Distribution Module (PDM) – Four 25A high-current outputs for controlling supported electrical loads without requiring separate conventional relays.

✅ Built-In Wideband Controller – Supports compatible Bosch LSU 4.9 and NTK wideband oxygen sensors.

✅ Advanced Data Logging – 128MB onboard memory with logging rates up to 1,000Hz.

✅ Wi-Fi Connectivity – Wireless communication capabilities for data access and supported connectivity features.

All systems are configured through Haltech’s powerful NSP (Nexus Software Programmer) software.

The result is a more integrated vehicle management system with fewer independent controllers and greater flexibility when designing your electrical system.

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⚡ Integrated Power Distribution – Simplify Your Wiring

One of the biggest advantages of the Haltech Nexus R3 is its integrated power distribution system.

Instead of relying entirely on traditional relays and external power controllers, the Nexus R3 provides programmable high-current outputs directly from the VCU.

Built-In Power Distribution Features

• 4 × 25A High-Current Outputs – Continuous-rated, PWM-capable outputs.

• 6 × 8A Half-Bridge Outputs – Programmable outputs for compatible electrical devices.

• 6 × Digital Pulsed Outputs – Additional control for low-current accessories and actuators.

• Programmable output operation through NSP.

• Integrated control strategies for electrical devices.

What Can You Control?

Depending on electrical requirements and system configuration, supported applications include:

• Electric fuel pumps

• Engine cooling fans

• Ignition and injector power supplies

• Transbrake systems

• Electronic throttle motors

• Auxiliary electrical devices

• Other programmable vehicle functions

Build a cleaner, more organized engine management system without adding unnecessary external electrical controllers.

Output assignments must be configured according to the electrical load, current requirements, and Haltech wiring specifications.

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🔥 Advanced Engine Management for High-Horsepower Applications

The Nexus R3 provides extensive control over fuel delivery, ignition timing, boost pressure, and engine protection.

Whether your engine is naturally aspirated, turbocharged, supercharged, or equipped with nitrous oxide, the R3 provides the tuning strategies needed to optimize performance.

Fuel & Ignition Control

• 8 peak-and-hold injector outputs

• 8 ignition outputs

• Multi-stage fuel injection strategies

• Advanced fuel and ignition mapping

• Closed-loop oxygen sensor control

• Long-term fuel learning

• Flex fuel compatibility

• 32 × 32 × 8 4D tuning table resolution

Boost Control

• Advanced 4D closed-loop boost control

• Closed-loop CO2 boost control

• Boost strategies based on configurable operating conditions

• Integration with traction and torque management strategies

• Advanced boost control for motorsport applications

Engine Protection

The Nexus R3 features multi-level engine protection strategies designed to help protect your investment.

Monitor critical operating conditions and configure protective responses when engine parameters exceed defined limits.

Protection strategies can be configured around supported sensor inputs and operating conditions, including:

• Oil pressure

• Fuel pressure

• Coolant temperature

• Intake air temperature

• Air/fuel ratio

• Engine knock

• Other monitored engine parameters

Making horsepower is only part of the equation. Protecting your engine while making that horsepower is equally important.

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🏁 Advanced Motorsport & Drag Racing Features

The Haltech Nexus R3 is designed for serious motorsport applications where precise engine and vehicle control can make the difference between winning and losing.

Motorsport Features Include

Launch Control

Configure launch strategies to help manage engine RPM and power delivery during vehicle launches.

Traction Control

Manage wheel slip through programmable traction control strategies.

Anti-Lag & Rotational Idle

Advanced anti-lag strategies for supported turbocharged applications, including rotational idle and rolling anti-lag functionality.

Transbrake Control

Integrated transbrake control capabilities for compatible drag racing transmissions and electrical systems.

Advanced Torque Management

Control engine torque using configurable strategies, including engine RPM and driveshaft RPM targeting.

Flat Shift Control

Advanced open-loop and closed-loop flat-shift capabilities for supported transmission applications.

6-Stage Nitrous Control

Manage up to six stages of nitrous oxide through programmable control strategies.

Race Timer

Integrated race timing functionality for motorsport applications.

Shock Travel & Ride Height Monitoring

Monitor supported suspension sensors and incorporate vehicle dynamics information into your data analysis.

Designed for Competitive Racing

The Nexus R3 is particularly well suited for:

• Drag racing

• Roll racing

• Time attack

• Circuit racing

• High-horsepower street applications

• Turbocharged engine swaps

• Custom motorsport builds

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⚙️ Automatic Transmission Control

The Nexus R3 goes beyond traditional engine management by supporting advanced automatic transmission control strategies.

According to Haltech, supported transmission applications include:

• Toyota A340

• GM 4L60

• GM 4L80

• ZF 6HP

• Configurable custom automatic transmissions

Custom transmission configurations can support up to 10 speeds, depending on the application.

Transmission Control Capabilities

• Gear selection and shift control

• Torque converter lockup control

• Line pressure control

• Accumulator pressure control

• Configurable transmission operating strategies

• Specialized control strategies for Liberty and Lenco racing transmissions

This makes the Nexus R3 an attractive solution for custom drivetrain installations requiring coordinated engine and transmission management.

Transmission compatibility, wiring, available functions, and required hardware must be verified for your specific application.

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🌽 Flex Fuel & E85 Compatibility

Planning to run E85, gasoline, or varying ethanol blends?

The Nexus R3 supports flex fuel operation when configured with a compatible ethanol content sensor.

With the proper calibration, the ECU can adjust engine operating parameters based on measured ethanol content.

Flex Fuel Benefits

• Compatible with ethanol content sensors

• Supports gasoline and ethanol fuel blends

• Ethanol-based fuel compensation

• Configurable ignition and fueling strategies

• Compatible with boosted and naturally aspirated applications

Enjoy the flexibility of multiple fuel blends without manually switching calibrations every time your ethanol content changes.

Proper fuel system sizing and professional calibration are essential.

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📊 Built-In Wideband Controller & High-Speed Data Logging

Accurate engine data is essential when tuning a high-performance vehicle.

The Nexus R3 includes a built-in wideband controller and high-speed data logging capabilities.

Integrated Wideband Controller

Supports:

• Bosch LSU 4.9 wideband oxygen sensors

• Compatible NTK wideband oxygen sensors

The integrated controller reduces the need for a separate external wideband controller.

Onboard Data Logging

• 128MB internal storage

• Up to 300 logging channels

• Up to 1,000Hz (1ms) sampling

• High-speed data acquisition

• USB-C connectivity

• Wi-Fi communication

Monitor engine performance, diagnose operating problems, and analyze vehicle behavior using Haltech NSP software.

Whether you’re reviewing a drag racing pass, diagnosing a boost control issue, or optimizing fuel delivery on the dyno, the Nexus R3 provides the data needed to make informed tuning decisions.

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🔧 Dual Drive-By-Wire & Variable Cam Control

The Nexus R3 supports advanced engine technologies found in modern performance engines.

Drive-By-Wire Throttle Control

• Supports two electronic throttle bodies

• Programmable throttle control strategies

• Integrated throttle position monitoring

• Configurable electronic throttle operation

Variable Camshaft Control

• Supports up to four variable camshaft controls

• Advanced camshaft timing strategies

• Integration with engine operating conditions

These capabilities make the Nexus R3 suitable for a wide range of modern engine platforms requiring sophisticated electronic control.

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📋 Haltech Nexus R3 Technical Specifications

Power Distribution

Communications & Data Logging

Engine Management

🚗 Compatible Engine Applications

The Nexus R3 is a universal standalone engine management system suitable for a wide range of custom applications.

Popular Engine Platforms

Honda / Acura

• K20 / K24 K-Series

• B16 / B18 B-Series

• H22 / H23

• J-Series V6

Chevrolet / GM

• LS1 / LS2 / LS3

• LQ4 / LQ9

• 4.8L / 5.3L / 6.0L LS-based engines

• Custom turbocharged and supercharged V8 applications

Toyota

• 1JZ-GTE

• 2JZ-GTE

• 1UZ / 2UZ V8

Nissan

• SR20DET

• RB25DET / RB26DETT

• VG / VQ engine platforms

Ford

• 5.0L Windsor

• Modular V8

• Custom performance engine applications

Rotary

• Mazda 13B

• Mazda 20B

• Custom rotary engine applications

Important: These are potential custom installation applications, not guaranteed plug-and-play fitments. Confirm trigger compatibility, injector and ignition requirements, electronic throttle configuration, variable cam control, wiring, and required accessories before purchasing.

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📦 What’s Included?

Haltech Nexus R3 VCU – Part Number HT-193000

• 1 × Haltech Nexus R3 Vehicle Control Unit

• Red and black SurLok power connectors

• Wi-Fi antenna

• Mounting bolts

• USB-C communication cable

• USB-C dust cap

Additional Components May Be Required

Depending on your application, additional components may include:

• Universal wiring harness

• ECU connector and pin kit

• Wideband oxygen sensor

• Wideband sensor wiring

• Engine sensors

• CAN communication accessories

• Power distribution wiring and protection

• Vehicle-specific adapters

Note: This listing is for the Nexus R3 VCU itself. A complete engine wiring harness and wideband oxygen sensor are not included unless specifically selected as part of a separate package.

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🛠️ Professional Haltech Installation & Remote Tuning – Kugan Tuning

Purchasing a standalone ECU is only the beginning.

Proper wiring, sensor configuration, startup calibration, and professional tuning are essential for achieving reliable performance.

At Kugan Tuning, we specialize in aftermarket engine management solutions for high-performance street and racing applications.

Our Haltech Tuning Services

Initial ECU Configuration

We can assist with configuring the ECU for your engine combination, including supported fuel, ignition, trigger, and sensor settings.

Startup Basemap Development

A properly configured starting calibration helps establish the foundation for initial engine startup and further tuning.

Remote ECU Tuning

Our remote tuning services allow customers to work with Kugan Tuning without transporting their vehicles across the country.

Datalog Review & Calibration Revisions

We analyze engine operating data to help identify calibration issues and improve performance.

Advanced Engine Management Support

From boost control and flex fuel to engine protection and motorsport functions, we can help you plan and configure the features needed for your build.

Why Buy From Kugan Tuning?

When building a high-performance engine, choosing the correct ECU is just as important as selecting the right turbocharger, fuel system, or transmission.

We understand the challenges involved in custom engine management installations, including wiring problems, sensor compatibility, startup issues, and calibration requirements.

Our goal is to help customers select an ECU that meets their actual engine requirements rather than purchasing hardware that lacks the necessary inputs, outputs, or features.

Need help choosing between the Haltech Nexus R3, Nexus R5, or another standalone ECU?

Contact Kugan Tuning with your engine specifications, wiring requirements, horsepower goals, and intended vehicle use.

We’ll help you determine the appropriate engine management solution.

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❓ Frequently Asked Questions

Is the Haltech Nexus R3 a standalone ECU?

Yes. The Nexus R3 is a standalone vehicle control unit that combines engine management, integrated power distribution, wideband control, and data logging.

Does the Nexus R3 require a separate PDM?

Not necessarily. The R3 includes four 25A high-current outputs and additional programmable outputs. Applications requiring more circuits or additional current capacity may still need external power distribution hardware.

Can the Nexus R3 control an automatic transmission?

Yes. Haltech supports transmission control strategies for applications including the GM 4L60, GM 4L80, Toyota A340, and ZF 6HP, as well as configurable custom transmissions.

Can I run E85 with the Nexus R3?

Yes. The Nexus R3 supports flex fuel operation with the appropriate sensor, fuel system, and ECU calibration.

Does the Nexus R3 support drive-by-wire throttle?

Yes. The Nexus R3 supports dual electronic throttle control.

Does the Nexus R3 have a built-in wideband controller?

Yes. It features one onboard wideband controller compatible with supported Bosch LSU 4.9 and NTK sensors.

Does the Nexus R3 support traction control and launch control?

Yes. Both features are supported, along with advanced torque management, anti-lag, transbrake control, and other motorsport functions.

Is the Nexus R3 suitable for turbocharged LS or Honda K-Series engines?

Yes. The Nexus R3 can be configured for many turbocharged LS and Honda K-Series applications, provided the engine’s control requirements fall within the ECU’s supported capabilities.

Can Kugan Tuning remotely tune my Haltech Nexus R3?

Kugan Tuning offers Haltech remote tuning services for supported engine combinations. Contact us with your engine specifications, modifications, and tuning requirements to confirm service compatibility.

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🏆 Take Complete Control of Your Engine

The Haltech Nexus R3 VCU delivers much more than traditional standalone engine management.

With integrated power distribution, advanced fuel and ignition control, high-speed data logging, flex fuel compatibility, and motorsport-specific features, the Nexus R3 provides a powerful foundation for your next performance build.

Whether you’re building a street-driven turbocharged engine, a dedicated drag car, or a custom race vehicle, the Nexus R3 gives you the flexibility to configure your engine management system around your performance goals.

Order your Haltech Nexus R3 from Kugan Tuning today.