Haltech Nexus R5 VCU + Universal V8 Terminated Harness - HT-195400

The Nexus R5 VCU paired with Haltech's Universal V8 Terminated Harness (HT-186200). The harness plugs straight into the R5 and suits most popular big block and small block V8s from GM, Ford and Chrysler.

The Haltech Nexus R5 is Haltech's flagship Vehicle Control Unit (VCU). It rolls four systems into one compact box: a full engine management system, a power distribution module (PDM), a high-speed data logger and a dual-channel wideband controller. Fewer separate modules means a simpler, lighter loom, fewer failure points, and one piece of software (Nexus Software Programmer, NSP) to set up the whole car.

Harness features

• Plugs directly into the Nexus R5 VCU
• Terminated connections for both the engine bay and the cabin
• Connection for Haltech CAN devices such as dashes and keypads
• Sensor connections for crank, cam, MAP, temperature, pressure, position, speed and flex fuel
• Allocation for dual wideband lambda sensors
• Breakouts for 8 ignition coils, 8 primary, 8 secondary and 2 tertiary injectors
• Breakouts for alternator control, thermofan, fuel pump and transmission control
• Starter solenoid control and dual boost control solenoid allocation
• Spare inputs and outputs, spare 8 A PDM outputs and a spare half-bridge output

Sub-harnesses required (sold separately)

This kit does not include the injector, ignition or alternator sub-harnesses. Choose the ones that match your engine:

• Injectors: HT-186000 V8 Primary Injector EV1, HT-186001 V8 Secondary Injector EV1, HT-186002 V8 Primary Injector USCAR, HT-186003 V8 Secondary Injector USCAR
• Ignition: HT-186060 Nexus V8 GM/Chrysler IGN1A, HT-186061 Nexus V8 Ford IGN1A
• Alternator: HT-186123 GM LS 2-Pin Bosch, HT-186124 GM LS 4-Pin Delco, HT-186125 GM LS 2-Pin Yazaki

Hardware highlights

• Runs up to 18 injectors (peak and hold) and 12 ignition outputs, so it suits engines up to 12 cylinders or 6 rotors
• Built-in PDM: 4 x 25 A push-pull outputs (PWM up to 5 kHz) and 12 x 8 A high-side outputs to power pumps, fans, coils, injectors, sensors and solenoids directly
• 4 x 8 A half-bridge outputs for drive-by-wire throttle and other H-bridge loads
• 8 PWM-capable low-side outputs, and spare injector/ignition channels can also be used as low-side drives
• 23 x 0-5 V analog inputs with switchable pull-ups and redundancy for electronic throttle
• 10 synchronised pulsed inputs for cam, speed and frequency sensors
• Differential trigger and home inputs with adjustable thresholds and glitch filtering
• Two onboard wideband controllers supporting NTK and Bosch LSU 4.9 sensors
• 3 CAN buses with switchable termination
• 512 MB onboard logging: up to 300 channels at up to 1 kHz
• Onboard Wi-Fi, USB-C connection and built-in G-sensor, compatible with the Haltech Connect app

Tuning and race features

• Long-term fuel learning (up to 4D) and dual closed-loop O2 control
• 4D closed-loop boost control and closed-loop CO2 boost control
• Launch control, traction control and advanced torque management (driveshaft and engine RPM targeting)
• Anti-lag, rolling anti-lag and rotational idle
• Dual knock control and multi-level engine protection
• Flat shift, transbrake control and race timer
• Up to 6-stage nitrous control
• Variable cam control for up to 4 cams
• Flex fuel, multi-stage injection, intake air bleed and stepper motor idle control
• Shock travel and ride height logging
• Automatic transmission control for Ford AODE/4R70W, GM 4L60E and 4L80E, Toyota A340E, Lenco and Liberty

Key specifications

What's in the box

• 1 x HT-195000 Nexus R5 VCU
• 1 x HT-186200 Universal V8 Terminated Harness