Bore And Stroke Displacement Calculator

Engine Displacement Formula:

\[ Disp = \pi \times B^2 \times S \times N_{cyl} / 4 \]

Engine Displacement (Disp):

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1. What is Engine Displacement?

Engine displacement is the total volume of all the cylinders in an internal combustion engine. It's a key measurement that indicates the engine's size and potential power output, typically measured in cubic centimeters (cc) or liters (L).

2. How Does the Calculator Work?

The calculator uses the engine displacement formula:

\[ Disp = \pi \times B^2 \times S \times N_{cyl} / 4 \]

Where:

\( Disp \) — Engine displacement (cubic centimeters)
\( \pi \) — Mathematical constant Pi (approximately 3.1416)
\( B \) — Cylinder bore diameter (millimeters)
\( S \) — Piston stroke length (millimeters)
\( N_{cyl} \) — Number of cylinders

Explanation: The formula calculates the volume of a single cylinder (πB²S/4) and multiplies it by the number of cylinders to get total displacement.

3. Importance of Engine Displacement

Details: Engine displacement is a primary factor in determining an engine's power output, fuel consumption, and emissions. Larger displacements generally produce more power but consume more fuel.

4. Using the Calculator

Tips: Enter bore and stroke measurements in millimeters, and the number of cylinders. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is displacement measured in cubic centimeters?
A: Cubic centimeters provide a precise measurement of engine size. 1000cc equals 1 liter, which is another common unit for engine displacement.

Q2: How does displacement relate to engine power?
A: Generally, larger displacement engines can produce more power, but efficiency, technology, and forced induction also significantly impact power output.

Q3: What's the difference between bore and stroke?
A: Bore is the diameter of the cylinder, while stroke is the distance the piston travels from top to bottom. These dimensions affect engine characteristics.

Q4: Can two engines with the same displacement perform differently?
A: Yes, factors like compression ratio, valve timing, induction system, and engine design greatly affect performance despite similar displacement.

Q5: How is displacement related to vehicle taxation?
A: In many countries, vehicle taxes are based on engine displacement, with larger engines typically incurring higher taxes.