Comments by "The Underground Lair of the Squankum" (@theundergroundlairofthesqu9261) on "Dave's Auto Center"
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Excellent video!
I'm a little confused around the 26:00 mark. The dimples have a lot of airflow and when the burns swirl through them, those corners get a lot of heat in them. Is this what drove the decision to use ceramic coating? Is the coating to help those corners/edges of the dimples survive the heat? And/or to just increase efficiency of the whole process, also, because the rest of the piston isn't absorbing as much heat, and that burned fuel goes towards pushing a piston and then, driving a turbo?
Also, when it comes to what the heat does for us, let's say this is a naturally aspirated engine, even without a turbo, before that exhaust valve opens, the heat being retained because of the ceramic coating on the piston means more heat to expand the air in the cylinder as the fuel burns, right?
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