Normally a piston spec includes the valve notch so a -14 cc dome is gross just as a + 14 cc dish would include the valve notches in that number.
http://www.rbracing-rsr.com/comprAdvHD.htmThis calculator uses @.050 numbers on the calculation so a 240 at .050 intake lobe is 240/2 = 120 then the install is 106 so 74 deg remain to bdc you take the remaining 120 deg and subtracted the 74 from it leaving 46 degrees @.050 ABDC boost is 0.
It gives me 225 and 10.5
This calculator has been withing 7 to 8 lb actual average cranking compression on my last three motors and numerous friends motors.
