Enter the bore diameter, stroke length, rod length, and deck height into the calculator to determine the compression height.

Compression Height Calculation Formula

The following formula is used to calculate the compression height. 

Compression Height = Deck Height - (Stroke Length / 2) - Rod Length

Variables:

  • Compression Height is the distance from the center of the wrist pin to the top of the piston (mm)
  • Deck Height is the distance from the crankshaft centerline to the top of the block (mm)
  • Stroke Length is the distance the piston travels from top dead center (TDC) to bottom dead center (BDC) (mm)
  • Rod Length is the length of the connecting rod (mm)

To calculate the compression height, subtract