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Quote:
Originally Posted by Jack E/NJ
Pete >>>When you are trying to get maximum compression, why do something that
decreases compression.>>>
I'm confused. How does a flat popup that kisses a correponding flat recess reduce compression?
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It shouldn't as long as the squish is the same. There would be a tiny bit of loss around the perimeter of the pop-up - as it obviously can't scrape the chamber. You can see on my piston design for the FlatCAD, I have a tiny "relief" in the area of the pop-up.