Mastering the Real Engine: The Definitive Guide to LFS Tweaking and Physics Customisation
Enabling custom engines (like stuffing a massive 35-liter V12 with bar of boost into a lightweight chassis).
is a highly specific phrasing used by the Live for Speed (LFS) simulation racing community to distinguish comprehensive, legitimate car configuration tools from deceptive, malware-ridden software online . In the LFS ecosystem, "tweaking" refers to the modification of vehicle parameters—such as engine horsepower, drivetrain mechanics, suspension geometry, and tire physics—beyond the standard options provided in the base game.