You can do a pretty good job of estimating cc's by using modeling clay on the
head and displacing water with it in a graduated cylinder. I think the Bob
Sharp manual has some of the calculations for head gasket displacement and
stock domed piston displacement. The Bob Sharp manual has a lot of the
formulas needed to calculate compression ratio. I think that the U20 pistons
in a stroker R16 motor would yeild a lower compression ratio than the stock
R16. The 1600 pistons in a stroker would yeild a higher ratio than the stock
R16 but would have to be machined for skirt clearance and valve clearance.
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