Isuzu D-Max / MU-X 3.0D 4JJ1 RHV4 - Stage 1 Performance Turbocharger
Isuzu D-Max / MU-X 3.0D 4JJ1 RHV4 - Stage 1 Performance Turbochargers
The latest revision IHI RHV4, for the Isuzu D-Max / MU-X 3.0D 4JJ1 motor, is used as the starting point. The compressor wheel is upgraded to a 44/60mm German engineered high performance billet compressor wheel, with state of the art geometry and ultra lightweight design. The compressor housing is then machined to H7 ISO standards to ensure absolute perfect bore tolerance. In addition, the variable geometry control is adjusted to allow 15% more exhaust gas flow for a reduction in lag and smoother boost.
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 to speeds well over 180,000 RPM. This achieves the ultimate reliability, and acquires a standard far beyond OEM.
Features
- 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
- 44mm inducer / 60mm exducer
- Balanced to within 0.5 grams at speeds well over 180,000 RPM. VSR48 maxed out!
- 25% Flow increase over stock.
- Rated to 30 PSI
- Fitment as original. Plug & Play. Actually bolt on. Direct replacement unit
Note
The RHV4 is compatible with other Isuzu 4JJ1 engines fitted with the RHV5, however there are slight differences such as:
- The VGT actuator design
- Intercooler retaining bolt
- Turbine size, RHV4 is smaller than RHV5
Tuning Notes
Warranty
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.
Do not exceed (pressure side) Exhaust Manifold Temperatures (EGTs) above 800c.
The performance of this turbo exceeds the stock injector capacity. It is not recommended to excessively increase injection duration in order to max out turbo efficiency.
This turbo is rated to 30 PSI. However, with upgraded injectors it is possible your tuner may see boost pressures as high as 34PSI.