# compression volume (V2)

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KurtHeckman.compression volume (V2)
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The Cylinder Compression Volume calculator computes compression volume (V2) of the cylinder at the bottom of the stroke when the volume is at a minimum and is also known as the Clearance Volume and the Combustion Chamber volume.  The Compression Volume is a function the piston chamber volume, deck volume, compression gasket volume, dish volume, dome volume, valve relief volume, crevice volume, and chamfer volume.   Chamfer
Crevice
Deck Height

INSTRUCTIONS: Choose your units (default is cubic inches) and enter the following:

• (cV) This is the chamber volume of the piston and the largest portion of the Compression Volume,
• (dV) This is the deck volume
• (cgV) This is the compression gasket volume
• (dishV) This is the dish volume (usually published in the cylinder specs)
• (domV) This is the dome volume (usually published in the cylinder specs)
• (vrV) This is the valve relief volume
• (crvV) This is the cylinder crevice volume
• (chmfV) This is the cylinder chamfer volume

Compression Volume: The calculator computes the Compression Volume in cubic inches.  However, this can be automatically converted to other volume units (e.g. cubic centimeters or liters) via the pull-down menu.  Note, a piston has either a dome or a dish, not both. Also note that the crevice and chamfer volumes have a default of zero since they are often ignored

Related Combustion Engine Calculators:

• RATIOS AND LENGTHS:
• Bore (diameter): Compute the Bore Diameter based on the engine displacement, number of cylinders and the stroke length.
• Bore Stroke Ratio: Compute the Bore Stroke Ratio based on the diameter of the bore and the length of the stroke.
• Compression Ratio: Compute the Combustion Ratio base on the minimum and maximum displacements of the cylinder at the beginning (1-Induction) and compressed (3-Power) portions of the combustion cycle (see animation)
• Displacement Ratio: Compute the Displacement Ratio based on the volumes at the beginning and end of the stroke.
• Rod Length Stroke Ratio: Compute the Rod and Stroke Length Ratio base on the two lengths.
• Stroke (length): Compute the Stroke Length based on the total engine displacement, number of cylinders and the bore.
• VOLUMES:
• Total Engine Displacement: Compute the Total Volume (displacement) of a Combustion Engine based on the bore, stroke and number of cylinders.
• Engine Cylinder Volume: Compute the Volume (displacement) of a Engine Cylinder based on the bore and stroke.
• Engine Cylinder Overbore Volume: Compute the Volume (displacement) of an Engine with an Overbore based on the stroke, bore, overbore and number of cylinders.
• Rotary Engine Equivalent Displacement: Compute the Equivalent Volume of a Rotary Engine based on the swept volume and number of pistons.
• Gasket Volume: Compute the Volume of a Gasket based on the inner and outer diameters and the gasket's thickness.
• Deck Volume: Compute the Volume of a Cylinder Deck based on the deck height and the bore.
• Crevice Volume: Compute the Volume of a Cylinder Crevice based on the piston diameter, cylinder bore and the crevice height.
• Chamfer Volume: Compute the Volume of a Cylinder Chamfer based on the cylinder diameter and the chamfer height and width.
• SPEEDS AND RPMS:
• Piston Speed: Piston Speed (mean) based on stroke length and RPMs.
• Max Piston Speed: Max Piston Speed based on stroke length and RPMs
• RPMs: RPMs based on desired piston speed and stroke length.