Porsche flat engine - Flat 8 engines

8/7/2013

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Porsche’s first flat eight, the Type 771, was significantly more complex than the later 908 motor.

Type 753

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Categories

FGT
Knocking

With conventional wastegated turbochargers or fixed geometry turbochargers (FGT), a turbine flow area cannot be adjusted during operation.

Knocking is abnormal combustion in which the air-fuel mixture ignites prematurely due to exposure to high temperature and pressure, creating an unwanted high-frequency noise. When the compression ratio is increased, the temperature at compression top dead center (TDC) also rises, increasing the probability of knocking.