Nissan Skyline R34 GTT RB25DET NEO – Haltech Platinum Pro Plug-In
This 2014 Nissan Skyline R34 GTT project produced 534 hp and 501 lb-ft at the flywheel from an internally stock RB25DET NEO on 99 RON pump fuel.
Steve had worked with the car from close to its original specification and previously calibrated it using FC Tuning’s Nistune solution. When Haltech released the Platinum Pro Plug-In for the R34 GTT, the car offered the right opportunity to move to a more capable standalone engine-management platform without unnecessarily disturbing the factory wiring loom.
At the time, this was the first Nissan Skyline R34 GTT in the UK to receive a Haltech Platinum Pro Plug-In ECU. The top-mounted BorgWarner EFR 7670 installation was also among the first applications of this turbo on an RB-series engine in the UK.
Customer objective and original configuration
The customer wanted to retain the standard RB25DET NEO engine internals for the initial stage, while creating a hardware and engine-management foundation that could later support a forged bottom end and a worked cylinder head.
The 2014 specification retained the internally stock RB25DET NEO and included:
- Haltech Platinum Pro Plug-In ECU
- internally gated BorgWarner EFR 7670 turbocharger
- custom top-mount exhaust manifold
- R35 GT-R injectors, fitted as direct drop-in replacements for the OEM RB25DET NEO injectors
- upgraded fuel system
- upgraded exhaust
- performance air filter and supporting intake modifications
The planned forged-engine and cylinder-head phase remained an option rather than completed work. The stock-engine combination drove so well that the customer never proceeded with it. As of 2026, the engine still had not needed the proposed forged and head-worked upgrade.
Why use the Haltech Platinum Pro Plug-In?
The Haltech platform provided a more advanced engine-management foundation for the BorgWarner EFR 7670 and supporting hardware. The Platinum Pro Plug-In could integrate with the R34 GTT without replacing or heavily modifying the original engine wiring loom, preserving the integrity of the car while providing the additional control required for the new turbo and fuel-system specification.
For a road-focused car, this was a better fit than carrying out a more invasive universal standalone ECU and custom-loom conversion.
Supplied, installed and calibrated by FC Tuning
Steve supplied and installed the Haltech Platinum Pro Plug-In ECU before calibrating the car on a Dyno Dynamics dyno using 99 RON pump fuel. The setup was refined to provide strong usable performance while retaining the stock engine internals and OEM-like road manners.
Engine safety and control strategy
The calibration used Haltech’s fail-safe functionality together with a Haltech wideband control unit. The ECU monitored coolant temperature, oil temperature and intake-air temperature. The protection strategy also included oil-pressure monitoring and protection, overboost protection, air-intake strategies and boost-by-gear control.
The wideband controller supplied air–fuel-ratio feedback, adding another layer of protection and control for the internally stock RB25DET NEO.
Vehicle specification and result
- Vehicle: Nissan Skyline R34 GTT
- Engine: internally stock RB25DET NEO
- ECU: Haltech Platinum Pro Plug-In
- Turbo: internally gated BorgWarner EFR 7670
- Injectors: R35 GT-R direct-fit replacements
- Fuel: 99 RON pump fuel
- Boost: 1.5 bar
- Dyno: Dyno Dynamics
- Measured flywheel output: 534 hp and 501 lb-ft of torque
More power without sacrificing road manners
Despite the substantial increase in power, the owner reported improved fuel economy. Off boost, the car retained OEM-like drivability—if not better—while also gaining sharper throttle response. In the owner’s experience, it delivered the best of both worlds: considerably more performance without sacrificing everyday road manners.
The fact that the planned forged and head-worked phase had still not been required in 2026 provides a meaningful long-term outcome, rather than only a result from the original dyno session.
Watch the R34 GTT dyno video
The video above records the car and shows the final 534 hp and 501 lb-ft flywheel result at the end.
Dyno graph
Original Dyno Dynamics graph reserved for insertion.
The recorded result can currently be seen at the end of the video above.
Planning a Haltech-powered Nissan Skyline?
FC Tuning is an authorised UK Haltech dealer and can advise on ECU selection, supply, installation, setup and professional calibration for Nissan Skyline and other performance-engine applications.
Contact FC Tuning about your Haltech project, or learn more about Haltech ECU supply, installation and tuning.