By definition, the compression ratio (CR) is the total swept volume of the cylinder with the piston at bottom dead center (BDC), divided by the total compressed ...

We walk you through a compression test, a great way to determine the condition of your valves and piston rings.

The cam should complement the cylinder head choice, working to utilize the potential of the ports while being compatible with other factors like compression.

HOW TO CALCULATE COMPRESSION RATIO Compression ratio is a fixed relationship of cylinder volume with the piston at bottom dead center (BDC) divided by cylinder volume with the piston at top dead ...