Calculate your Engine's Compression Ratio Here. Fill out the required fields and you will see
the magic. If you want to see what a sample calculation looks like hit the "Sample" button.
Below is a description of each field of data -
- Number Of Cylinders - Number of Pistons in your Engine
- Bore - Engine Bore in Inches
- Stroke - Engine Stroke in Inches
- Chamber Volume - Cylinder Head Combustion Chamber Volume in CC
- Head Gasket Thickness - Compressed Head Gasket Thickness in Inches
- Head Gasket Bore - Bore size of the Head Gasket in Inches
- Piston To Deck Height - Positive number is below the deck, Negative Above in Inches
- Piston Type -
- Dished - Dome Volume is Subtracted
- Flat Top - Dome Volume is Subtracted
- Domed - Dome Volume is Added
- Dome Volume - The Dome Volume as described above for each piston in CC
Note: that the Dome volume includes Dish, Valve Releifs.
For Example if you have a Flat Top Piston with valve reliefs the Dome
Volume would what is cut out for the valve. If a Domed piston with valve
reliefs the total dome volume would be the Dome - Valve Reliefs. For a Dished
Piston the Dome Volume would the the total negative volume. All data is entered
as a POSITIVE Value and the Piston type will determine how the number is
used.