1. What are the differences between Arashi journal bearing, Kuro ball bearing and KBT turbo?

Arashi Journal Bearing Turbos

Arashi journal bearing turbos is composed with standard journal bearing center cartridge type like MHI, Toyota, IHI,…etc. Features of journal bearing include durability, it manages shock and high boost better and it’s more affordable than the other systems. 

Kuro Ball Bearing Turbos

Kuro ball bearing turbos are like the typical type of ball bearing turbos, it consumes only half of the oil than journal bearing turbos and its spool is 15% faster than journal bearing. 

KBT Turbo

KBT turbo is our latest invention, it combines both journal bearing and ball bearing system by swapping journal bearing bush to ceramic ball bearing without having to change the oil and water line kits. Therefore has all the advantages combined together.

2. When do I need an oil restrictor?

We strongly recommend using an oil restrictor when you have a ball bearing system cartridge including our KBT turbos, it ensures optimal performance especially at high engine speed.

3. What are the things that I need to be aware of before installing turbocharger(s)?

Before you install the turbocharger...

a. Make sure oil feed bolts and banjo, oil feed hose, oil drain pipes, inlet pipes, and outlet pipes are clean, no carbon attached on them otherwise oil flow would be attached. Clean the parts using air gun if needed. This is very important because it will help the turbocharger to run smoothly and prolong its life. 

b. Check and be sure that nothing is attached on the passage of the exhaust manifold.

c. Inject some oil to the oil inlet hole then run the engine for few minutes.

d. Clean out any particles on the rear part of the air-intake pipe of your air filter.

e. If you find any problems after the turbocharger is installed, please check that the oil is not polluted by dust. Change the oil and make sure that the inlet and outlet pipes are clear, that nothing is affecting the oil flow.

f. Use selected oil on the engine.

g. ALL of the turbochargers are new unless otherwise specified, but each turbocharger has different life lengths due to different applications and settings.

4. What are the differences between external and internal wastegates and how do I choose which one to use?

External wastegate is located on your exhaust manifold and it vents exhaust gasses from the turbo to control boost pressure while the internal wastegate is built onto the turbocharger and its boost control rely on an opening valve in the turbine housing. It’s better to use an external wastegate when targeting higher horsepower with higher boost pressure.