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Small-Scale Question Sunday for March 9, 2025

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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They're not backyard-maintainable, but nor are modern ICEs.

My sense is that the Toyota Dynamic Force engines are still mostly backyard-maintainable (there will always be a question of level of effort as well as some specific sub-systems), and they're pretty darn efficient. Seems they got there with just good old fashioned design optimization and only a couple additional computer-controlled subsystems.