What are the capabilities of a Genuine Turbo Manufacturer?

On-Engine Durability
A 1,000-hour general turbocharger durability test that is run on-engine in one of our engineering laboratories.
Some engines fail before our turbos do!

Gas Stand Cyclic Durability
(aka The Non-Sissy Test)
A 500-hour general turbocharger durability test. This is basically a “beat the crap out of the turbo” test. Survive this one and you’ve got one tough turbo!

Compressor & Turbine Housing Containment
A compressor/turbine wheel is weakened to “hub” burst at a specific speed. No portion of the wheel is allowed to penetrate a “containment shroud” surrounding the turbocharger. A test to ensure safety.

Shaft Motion
The maximum tolerances of the bearing system are tested for rotordynamic stability beyond the maximum turbocharger operating speed. This means no bearing problems and a long turbo life

Shaft Critical Speed
An analytical “test” that ensures that destructive shaft “critical speeds” are well out of the turbocharger operating range. For example, large wheels may require a large shaft diameter to avoid the “shafting bending” at critical speed.

Compressor & Turbine Seal
Multiple turbochargers are run on-engine under conditions designed to cause seal leakage. No significant leakage is allowed during these tests.

Heat Soakback
A turbocharger instrumented with thermocouples is taken beyond maximum operating temperature and shut down hard! Repeat the test four more times and make sure maximum temperatures stay within our strict limits to avoid oil “coking” or build up inside the center housing. This is particularly critical for high temperature gasoline applications.

Compressor & Turbine Performance
The entire operating range of both the compressor and turbine are mapped on one of our
“Performance Gas Stands.” These test cells are calibrated to strict standards to assure accuracy and consistency.

Thermal Cycle
A 200-hour endurance test that cycles the turbocharger from low temperature to “glowing red” every 10 minutes. To ensure a long turbo life, no cracking of the turbine housing or distortion of the heat shroud are allowed.

Compressor & Turbine Blade Frequencies
We have strict requirements for compressor and turbine blade natural frequency. This is critical on large trims where the blade must be stiff enough to withstand potentially damaging vibrations.

Rotor Inertia
A measurement made to document the rotational inertia of our compressor and turbine wheels. Our products are known for their high flow / low inertia characteristics.

Thrust Bearing Capacity
A test that stresses the thrust bearing at extreme conditions. This test makes sure your worldclass turbocharger can tolerate the load you put in through.

Compressor Fatigue
We will not sell compressor or turbine wheel casting that have not passed a strict “test to failure” cyclic fatigue test. We run tests on regular basis to ensure quality and to constantly improve our products.

Turbo Vibration
The entire turbocharger is vibrated on large shaker table. Vibration levels are monitored to ensure product durability.

Note: The above mentioned “qual tests” are supplied and carried out specifically by Garrett