Displacement is
Pi*r^2 * stroke * # cylinders
so if you're starting out on a 1.8, an 84mm piston will put you just under 2.0L, but close enough to call it 2.0L
__________________
-Harry
AIM: NDcissive
CRX and Pre '92 Civic, Engine Tech and Tuning, & Track and Autocross Forum Mod