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Bore & Stroke
Ready
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Engine Geometry
tune
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Engine Preset
Custom / Manual
Toyota 2JZ-GTE (Supra · I6)
Nissan RB26DETT (Skyline · I6)
Honda F20C (S2000 · I4)
Chevrolet LS3 (V8)
settings
Bore Diameter (mm)
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Stroke Length (mm)
grid_view
Number of Cylinders
calculate
Calculate
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Reset
Displacement Results
speed
straighten
Square engine
Balanced powerband & linear torque
—
cc
Total Displacement
—
Bore / Stroke
Ratio
—
Liters
—
cc / cyl
—
Cylinders
V = (π · B² · S · N) / 4 · 10⁻³
Bore (mm) · Stroke (mm) · Cylinders → cc
Piston Animation
animation
Live crank & piston kinematics
Architecture Guide
info
straighten
Square
— Bore ≈ Stroke. Balanced torque and revs.
north
Oversquare
— Bore > Stroke. High-RPM, peak power bias.
south
Undersquare
— Bore < Stroke. Strong low-end torque.