Cartridge GTA4502V 758204-0007 752389-0009 Detroit Series 60

What is the role of the journal bearing on turbocharger?
The journal bearing system in a turbo functions very similarly to the rod or crank bearings in an engine. These bearings require enough oil pressure to keep the components separated by a hydrodynamic film. If the oil pressure is too low, the metal components will come in contact causing premature wear and ultimately failure. If the oil pressure is too high, leakage may occur from the turbocharger seals.

How does a Waste gate work?
A Wastegate is simply a turbine bypass valve. It works by diverting some portion of the exhaust gas around, instead of through, the turbine. This limits the amount of power that the turbine can deliver to the compressor, thereby limiting the turbo speed and boost level that the compressor provides.

What is the difference between a turbo and a supercharger?
Whilst a turbo utilises the exhaust gases of an engine to drive it, a supercharger is mechanically driven by the engine, usually via a belt connected to the crankshaft.
In terms of performance, turbochargers tend to be more efficient, with superchargers providing a more immediate response.

What is a twincharger?
A twincharger is an engine that utilises both a supercharger and a turbo. The idea behind twincharging is that you get the advantages of the quick response from the supercharger, and the efficiency from the turbo.