Cartridge CT26 17201-17010 1720117010 Toyota Landcruiser 1HDT

What are the different compressor wheel design variations?
Flatback: Earliest design of compressor wheel and still used by some manufacturers. flatback Superback: This design was introduced due to the increased speeds which the turbochargers rotate, because of the speed increase the force on the compressor wheel increases significantly, in particular the exducer diameter of the compressor wheel suffered the most. This is the point which rotates the fastest and is therefore under the most stress. The Superback reinforces the back face of the compressor wheel preventing the compressor wheel tearing from the bottom up. superback Deep Superback: An exaggerated design of the Superback, generally used on more recent applications. Again, one theory is due to the increasing rotation speeds of the turbo. deep-superback Deep Superback – Extended tip: This design promotes greater airflow providing a faster boost response at lower engine speeds. The extended tip design increases the efficiency of the Superback compressor wheel at higher boost pressures. MFS – Machined from Solid compressor wheels are becoming increasingly popular as these new developments from the OE’s continue to arrive in the aftermarket. The wheels are fully machined and balanced on leading 5-axis machining equipment and precision balanced on fully automated balancing stations with auto-correction.

How to work with a Wastegate?
The Wastegate valve can be "internal" or "external". For internal Wastegates, the valve itself is integrated into the turbine housing and is opened by a turbo-mounted boost-referenced actuator.
-An external Wastegate is a self-contained valve and actuator unit that is completely separate from the turbocharger.
-In either case, the actuator is calibrated (or set electronically with an electronic boost controller) by internal spring pressure to begin opening the Wastegate valve at a predetermined boost level.
-When this boost level is reached, the valve will open and begin to bypass exhaust gas, preventing boost from increasing.