The 964 heads apparently are typically ~90cc from factory, so my results are in line with that.
I decided to redo the measurements for the piston dome. The results are:
Machined Piston: 33.068 cc dome volume
= 10.38:1 CR
Stock Piston: 36.242 cc dome volume
= 10.87:1 CR
Obviously SoK blew the machining, and only took off .5 points of compression, instead of the 1.5 points they were supposed to. (they said 9:1 was their target CR )
Result: I have 6 beautifully machined pistons with thermal barrier coated tops and dry film lubricant to use as paperweights.
Kirk
