Compression ratio and deck height calculator
Enter your bore, stroke, head volume, and deck height.
Then press the "Calculate" button to run the program. Try various
deck heights until the desired compression ratio is indicated.
The octane rating
needed to prevent detonation is also estimated. There are many factors
that affect the octane requirement, including: air density, humidity, air-fuel
ratio, ignition advance, head temperature, carburetion, and the camshaft.
Sample size is B.S.A 500 cc