**BLOCKS**- bore

EJ20 - 92mm

EJ22 - 97mm

EJ25 - 99.5mm

**CRANKS**- stroke

EJ20/22 - 75mm

EJ25 - 79mm

EJ20 block + EJ20 crank = 1.995L

EJ20 block + EJ25 crank = 2.101L - Needs custom rods

EJ22 block + EJ22 crank = 2.218L

EJ22 block + EJ25 crank = 2.336L - Needs custom rods

EJ25 block + EJ20 crank = 2.334L - Needs custom rods

EJ25 block + EJ25 crank = 2.458L

All very quick rough calculations.

Volume = pi (3.141...) x radius x radius x height x 4 cylinders.

Radius = 1/2 bore.

Height = stroke.

Handy tables and calculators...

Compression ratios with mismatched heads and pistons - http://www.b4et.com/docs/cr_matrix.pdf (Outdated backup)

Compression ratio calculator - http://www.csgnetwor...m/compcalc.html