The ratio is calculated by the following formula:
, where- b = cylinder bore (diameter)
- s = piston stroke length
- Vc = volume of the combustion chamber (including head gasket). This is the minimum volume of the space into which the fuel and air is compressed, prior to ignition. Because of the complex shape of this space, it usually is measured directly rather than calculated.
Ahh...I just couldn't resist that.
Yes, Blinkwatt-you are correct. Higher compression-more HP. Here is the Wikipedia link for anyone who is just dying to know all about compression ratios....
http://en.wikipedia.org/wiki/Compression_ratio
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