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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...

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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...

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A turbocharger has two main sections – hot and cold. These two sections are covered by two housings, turbine housing and compressor housing. In the other discussion we’ve posted on Arashi Blog section, it discusses about how to choose the right sized turbine housing; in this article, we’ll discuss about the compressor A/R, which is also the size of the compressor housing. A/R is short for area/radius, its definition is the discharge, cross-sectional area divided by the radius from the turbo centerline to the centroid of that area. Don’t be annoyed by the calculation, usually A/R is specified when you...

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Both turbochargers and superchargers are forced induction devices that are used to create greater power in engines. The principle is to inject compressed air of higher density into the engine cylinder. Higher oxygen level call for corresponding higher fuel to explode and boost horsepower. However, turbochargers and superchargers differ primarily in their energy source. Turbochargers source their energy from the kinetic energy of exhaust gas while superchargers are powered by connecting to the engine with a belt pulley. When exhaust gas drives turbine wheel to spin, the wheels rotate and compress air at the same time before the compressed air...

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One of the most returned turbo failures we see has rubbed compressor housing and damaged heat shield/shroud. This is usually due to irregular circumstances in connection to the compressor side. In the discussion we’ll focus on air leakage. Another cause would be setting your boost too high. When you hear noises coming out from your engine, it is strongly recommended that you check all the parts connecting to the turbo especially all the pipes, make sure that all the pipes are not cracked. Once one of the pipes are cracked, air leakage, if not found in time, the pressure imbalance...

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