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If you’ve just recently got interested in car tuning and have heard about tuning stages and wonder what each stage means, we’re going to talk about the general idea of the tuning stages in this article. However, there is no definite answer to what exactly is a stage 1 tuning and what exactly is a stage 2 tuning, these terminologies only give people a rough idea of what they represent, every tuner or accessory companies might define each stage differently. In order to find out what each stage refers to exactly, it’s best that you check with the tuner you’d...

A shaft nut on a turbocharger assembly holds the compressor wheel and other rotor parts onto the turbine shaft. The tightness of a shaft nut is significant for the proper operation and safety of the turbo. To ensure that the shaft nut is tightened to the correct specification, use a torque wrench and tighten it to specific torque setting. Over- tightening may lead to nut, shaft, or compressor wheel failure, while a loose shaft nut can result in catastrophic damage to the compressor wheel, causing the whole turbo to fail operation. At Arashi we recommend torque the nut to 18-20...

A turbocharger is composed of compressor and turbine wheel coupled together by a shaft; alongside with turbine and compressor housing covering respective wheels. In this article we’ll be discussing mainly about Mitsubishi turbo wheel sizes. Bigger wheels generate more exhaust gases, therefore creating higher power output during high RPM compared to smaller wheels. However, larger wheels takes more time to spin up in full capacity, therefore they spool slower than the smaller wheels, causing what we call turbo lag. Smaller wheels are often used in smaller displacement engines or in applications where a quick spool time and good throttle response...

To ensure proper lubrication and cooling of the turbocharger components, oil pressure supply is recommended at the following for ball bearing turbos Minimum Oil Supply Pressure at Low Idle = 0.70 Kg/cm2 or 9.96 psi. Minimum Oil Supply Pressure at Peak Torque Speed = 2.17 Kg/cm2 or 30,87 psi.   Aside from proper lubrication and cooling, setting up proper oil supply is imperative because too much oil supply causes oil leakage from the turbo, in which people often mistaken it as a faulty turbo; and insufficient oil supply without proper lubrication eventually cause the turbo bearing to wear due to...

Each of the Arashi turbocharger is equipped with Max GT billet actuator. The diaphragm is enhanced for better performance and durability, and the casings are made of aluminum. It allows you to change the springs inside to reach your designated boost level. This upgraded actuator provides great boost response along with RPM range. Boost setting ranges from 0.2 – 1.79 bar, please make sure tuning is required. It also has a greater sensibility to handle boost pressures. If you’re wondering about how to change the springs, here are the steps: 1. Loosen the locking collar using the c-spanner by turning...