|
Engine Stage 2
TurboCharger
PowerStation & Litchfield Imports have perhaps more understanding than most regarding the twin scroll setup of the Newage JDM Subaru. Having completed a lot of development work with Turbo Dynamics on their original Type25 platform, who better to turn to for discussions around a new hybrid version of the standard twin scroll. PowerStation were instrumental in Engine Stage 1, and since discussions of what Stage 2 could include started mid way through Stage 1, it would come as no surprise that both companies would be heavily involved again.
The Basics
I’m sure we are all aware of what a turbo charger is and does, right?
For the uninitiated here is a simplistic explanation.
A turbo charger consists of two elements, the cold side (which is the inlet side, taking in air from the atmosphere) and the hot side (which expels hot exhaust gases through the exhaust system). Between the cold and hot chambers is a shaft that has respective rotary blades in each sides.
The concept of a turbo charger is to force air in to the combustion chamber in a denser way. The logic is more air (more dense) means more fuel can be burnt with a total process of achieving more power.
The hot side of the charger actually drives the inlet “suction” process by the exhaust gases turning the hot side blades, which in turn is driving the shaft which turns the cold side blades (impellar) causing suction.
Even though there is more to specifications of turbo chargers than this, in general terms the blade size and subsequent housing size (which the blades are encased by) stipulate how much air a turbo can flow (which results in given bhp results).
Also in general terms, the larger the rotary blades (wheel) and housing, the greater any lag will be and in turn the power band will be shifted.
This is only touching the tip of the iceberg concerning turbo charger design and concepts discussion.
|
