Feel the burn - Strategies employed to maximize thermal efficiency
Here is a great article in Racecar Engineering on the use of gasoline direct injection (GDI) in racing applications.  The article concentrates on the efficiency improvements in race engines using this technology.  GDI places additional heat loading on the exhaust requiring proper design and material selection.  As illustrated by the photo of this 2019 Audi DTM engine on the dyno.

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