Nissan Navara / Pathfinder YD25DDTI - Performance Turbocharger *Core Supply Only
Nissan Navara / Pathfinder 2.5D YD25DDTI - Performance Turbocharger
The latest revision Garret GTA2056, for the Nissan Navara / Pathfinder 2.5D YD25DDTI motor, is used as the starting point. The compressor wheel is upgraded to a German engineered high performance billet compressor wheel, with state of the art geometry and ultra lightweight design. In order to fit Stage 2 & 3 Compressor wheels, a custom billet back plate is precisely machined to fit the larger components. The compressor housing is then machined to H7 ISO standards to ensure absolute perfect bore tolerance. Our stage 3 turbocharger rear housing is also machined to the same ISO 7 Tolerances to fit the high performance ultra lightweight turbine wheel. In addition to above, the variable geometry control is adjusted to allow 15% more exhaust gas flow for a reduction in lag and smoother boost. Prior to this step, stage 3 turbochargers are fitted with upgraded VGT actuators. This modification is essential for the stage 3 unit to operate correctly at peak efficiency.
Reliability
Precisely balancing Aus Dyno turbochargers is a key critical factor to ensure unit longevity and performance. Good balance not only drastically improves reliability but also improves smoothness and acoustics. The difference between a stock unit and an Aus Dyno turbocharger is instantly noticeable. Great care is taken to consistently meet our stringent balancing standards for all turbos we sell. Firstly, parts are balanced at slow speeds in multiple planes using a CNC machine. Components are then assembled and dynamically balanced, this time maxing out the Cimat VSR48 Big Twin machine to speeds well over 180,000 RPM. This achieves the ultimate reliability and acquires a standard far beyond OEM.
Features
Stage 1
- Latest revision genuine housings & components
- Ultra lightweight, highly efficient next gen billet compressor wheel geometry
- Optimised compressor cover machining clearances
- Small nose hub resulting in larger blade surface area
- Wide profile stainless steel thrust collar
- High temperature heavy duty journal bearings
- Wide profile 360 race thrust bearing
- High temperature step gap piston ring seals, front & rear
- 42mm inducer / 56mm exducer
- Balanced to within 0.5 grams at speeds well over 180,000 RPM. VSR48 maxed out!
- 15% Flow increase over stock.
- Rated to 30 PSI
- Approximately 220hp
- Fitment as original. Plug & Play. Actually bolt on. Direct replacement unit
Stage 2
- custom billet back plate
- 45mm inducer 60mm exducer
- 25% Flow increase over stock
- Rated to 30psi
- Approximately 250hp
Stage 3
- custom billet back plate
- 50mm inducer 65mm exducer
- High performance, Ultra lightweight turbine shaft wheel. 51mm Inducer 49mm exducer 135g!
- Upgraded high tension actuator
- 45% Flow increase over stock
- Rated to 38psi
- Approximately 320hp
Tuning Notes
Warranty
Part Numbers
When fitting this turbo, it is HIGHLY recommended to seek professional tuning.
Zero-ing turbo gain maps will allow you to tune the VGT duty map in open loop. This is required to account for the drastic increase in turbo efficiency. Some tuners have recommended to leave the computer in open loop to prevent transient boost spiking and turbo failure due to boost leaks over speeding the turbo.
It is recommended to NOT exceed (pressure side) Exhaust Manifold Temperatures (EGTs) above 700c for the YD25. However, the turbocharger can handle sustained temperatures as high as 850c.
The performance of stage 1 & 2 turbochargers is within stock injector capacity. Stage 3 turbochargers require larger injectors to take full advantage of increased airflow. It is not recommended to excessively increase injection duration in order to max out the Stage 3 turbochargers efficiency.
The stage 1 turbo is rated to 30 psi. You will see boost pressures tapering at higher rpms
The stage 2 turbo is rated to 30 psi. It is possible to see pressures of 34psi.
The stage 3 turbo is rated to 38 PSI. It is possible to see pressures as high as 40psi.