408 Cam on the way

j par said
Is this all new stuff??..

Yes sir. Kinda goofy pistons. Hindsight is 20 20.

j par said
One of these days I'm going to have to wrap my mind around a piston with a dome and a dish...

I read all different methods to CC. The only thing that made sense to me was to start with the highest surface at zero deck. Down 0.5". Subtract measured volume from calculated 0.5" cylinder volume. It treats everything below the upper step as a "dish", including the valve reliefs, the actual dish, and the space between the rim and the raised step. The protrusion is entered as a minus number where the "below deck" entry would go. The "dish" is subtracted.

beanhead said
The 440 I just got back from my lmachinist was worse, .010" variance lowest to highest between all four corners. I gave him the rotating assembly for mock-up before any cutting was done, all nice and flat now.

My machinist purchased the rotating assembly for me so he could balance and set it up. The rod bearings were still in sealed packages so I know he did not check piston to deck.

Wyrmrider said
was looking at .050 quench
,020 positive deck with the first ,070 gasket straw man
.005 is a bunch
we got them dead nuts on with the Bridgeport even before BHJ tooling
measure twice cut once (usually :)

Sorry, can you explain the straw man comment?
KB says this piston does not have a quench pad. Perhaps the step up area is too small to be considered? I have no idea.
Were you milling blocks on the Bridgeport?