Is a dished piston at "Zero Deck" still zero deck?

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MrSony

Geezer
Nov 15, 2014
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Des Moines, Iowa
Say I have a piston with a circular 14.75" dish, but the "ridge" around it, is at zero deck, aka flush with the deck surface. Is this still considered zero deck?

For clarification, the compression calculator I have spit out my nonsense as this:

compression.JPG


Just playing around with the numbers, but my point remains the same. Might be my lack of sleep, or my anticipation for whats to come later today (3:34AM here), but I can't seem to come to a conclusion myself. Any input is appreciated.
 

Streetbu

Know it all, that doesn't
Supporting Member
May 22, 2011
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Yes it's zero deck, you just need to include the dish volume which you did so you're good to go.
 
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bracketchev1221

Royal Smart Person
Jan 18, 2018
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piston deck height is measured to the flat part of the piston. Dome or dish volume has no bearing on deck height.
 
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455'ed80Regal

Master Mechanic
Nov 3, 2010
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Lincoln, MO
What's your dynamic compression? That's more important than static.
 

pontiacgp

blank
Mar 31, 2006
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Kitchener, Ontario
you thought of this at 3:30 am???......when I was your age at 3:30 am I would be dreaming of genie
 
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