Formula:
CID = (π/4) * bore² * stroke * number of cylinders
Where:
* π (pi): Approximately 3.14159
* bore: The diameter of the cylinder, usually measured in inches.
* stroke: The distance the piston travels up and down in the cylinder, also measured in inches.
* number of cylinders: The number of cylinders in the engine (e.g., 6, 8, V8).
How to find the bore and stroke:
1. Engine Identification: Locate the engine's identification number (VIN) or casting number. This number often provides a clue to the specific engine model.
2. Online Resources: Search online using the engine's identification number, or its common designation (e.g., "350 small block Chevy," "LS1," etc.). Many websites and forums dedicated to Chevy engines will list the specifications, including bore and stroke, for various models. Manufacturer's specifications are the most accurate.
3. Owner's Manual: If you have the owner's manual for the vehicle the engine is in, it may specify the engine's displacement in cubic inches.
4. Engine Block: As a last resort, you could carefully measure the bore and stroke directly on the engine block itself. This is difficult and requires specialized tools and knowledge to do accurately.
Example:
Let's say you have a Chevy small-block V8 with:
* Bore = 4.00 inches
* Stroke = 3.00 inches
* Number of cylinders = 8
CID = (3.14159/4) * 4.00² * 3.00 * 8 = 301.59 cubic inches. This would be rounded to 302 cubic inches.
Remember to always use the most reliable sources (manufacturer specifications or reputable online databases) for accurate bore and stroke measurements to ensure an accurate CID calculation.
