I came across this info on another forum and copied the info here. It was just too good for it only to reside in one place. Thanks to Sonny who originally posted this information on HT.
You may want to play with the D-series compression calculator after reading this post :
You can click here to See a Diagram of Piston Specs
Additional piston specs are available here : https://www.superhonda.com/forum/show...postid=1207532
Late Model D-Series Piston Archive is available here : http://heeltoeauto.com/httech/YaBB.p...1160787887/0#0
Originally Posted by Sonny
So far, I have 6 different D series pistons to work with. I have almost every piston from 1.6 liter engines. I think I'm missing one from the 96+ Civic HX, but nobody has that car.
Here are the contenders so far:
I've measured the P29 and PM7 pistons in several ways and as far as I can tell, they are exactly
the same. I wonder why Honda made 2 different part numbers and castings for the same piston? Hmmm...