John,
I'm not so sure about your logic here... you are using different size shims to change the deck height based on measurements of dome volume and assuming everything else is the same... You could be screwing yourself IMHO. What if the difference in dome volume were, as you kinda mentioned, in the spark plug hole, or a slightly different casting that day. If you set your shim size this way I think you might end up skewing the carrier or something like that. You may wish to determine the cyl top to crank center distance as well as the bottom head sealing surface to top of head sealing surface to see if your cam carrier will be torqued flat... hehehe assuming it remains flat while torqued...
It seems to me that you will have to live with the individual differences in compression/deck height if you want it all to be flat on the top...
Maybe I don't know what I'm talking about...
Best regards,
Michael
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 Michael
'82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah
'13 Cayenne GTS
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