Free Build Tool · Subaru Boxer

SUBARU ENGINE CALCULATOR

Pick an EA, EJ, FA or FB variant to auto-fill factory bore, stroke and static compression — then solve for displacement, CR, deck height or chamber cc.

← All engines Subaru engine codes sheet →

Engine Specs

Pick a factory engine code to auto-fill bore, stroke and target CR — or skip and enter your own values.

Engine code preset

Solve for

Engine Bore (mm)Engine Stroke (mm)Deck Height (mm)Combustion Chamber (cc)

Result

Pick a variable to solve for, fill in the inputs, then press Calculate.

All metric (mm / cc). Static compression ratio — for dynamic CR factor in cam intake-close timing.