Piston type questions?
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Joined: Jan 2017
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From: Portage indiana
pop-up and dome mean the same thing. It's two descriptive terms to imply there is increased piston volume above the crown of the piston to assume combustion chamber space and in turn increase compression ratio.
I think the term "dome" is from years gone by where the dome shape was hemispherical and the dome on the piston looked like an actual dome. Now that combustion chambers come in all types of bathtub shapes the piston is left with this funky looking plateau over the piston crown that doesn't look at all like a dome. They needed to call it something, so pop-up was used.
I think the term "dome" is from years gone by where the dome shape was hemispherical and the dome on the piston looked like an actual dome. Now that combustion chambers come in all types of bathtub shapes the piston is left with this funky looking plateau over the piston crown that doesn't look at all like a dome. They needed to call it something, so pop-up was used.
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