New Audi 1.8 TFSI

In addition to many other new features, the monoscroll turbo features electric wastegate actuation for quicker response and better gas sealing. Active control means that it can be opened at part-load, reducing backpressure and catalyst light-off time… The cast turbine wheel is now Inconel rather than MAR steel, and the compressor wheel is milled from solid.

Audi TT Clubsport

In addition to many other new features, the monoscroll turbo features electric wastegate actuation for quicker response and better gas sealing. Active control means that it can be opened at part-load, reducing backpressure and catalyst light-off time… The cast turbine wheel is now Inconel rather than MAR steel, and the compressor wheel is milled from solid.

 

[Source: Automotive Engineering, April 2012]

 

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