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
Gasket
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
- Cylinder Bore Diameter based on the engine displacement, number of cylinders and the stroke length.
- Bore Stroke Ratio based on the diameter of the bore and the length of the stroke.
- 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
- Displacement Ratio based on the volumes at the beginning and end of the stroke.
- Rod and Stroke Length Ratio base on the two lengths.
- Stroke Length based on the total engine displacement, number of cylinders and the bore.
- Piston Position based on the crank angle, crank radius, and rod length.
- Piston Deck Height based on Block Height, Rod Length, Stroke Length, and Pin Height.
- Total Volume (displacement) of a Combustion Engine based on the bore, stroke and number of cylinders.
- Volume (displacement) of a Engine Cylinder based on the bore and stroke.
- Volume (displacement) of an Engine with an Overbore based on the stroke, bore, overbore and number of cylinders.
- Equivalent Volume of a Rotary Engine based on the swept volume and number of pistons.
- Compressed Volume of a Cylinder when the piston is at the end of the stroke and the chamber is at its smallest (and most compressed) volume, based on the chamber, deck, crevice, chamfer, gasket, valve relief and dome/dish volumes. This is the second volume (V2) in the Compression Ratio calculation.
- Volume of a Gasket based on the inner and outer diameters and the gasket's thickness.
- Volume of a Cylinder Deck based on the deck height and the bore.
- Volume of a Cylinder Crevice based on the piston diameter, cylinder bore and the crevice height.
- Volume of a Cylinder Chamfer based on the cylinder diameter and the chamfer height and width.
- Clearance Volume of a Piston
- Engine Compression Raio
- Piston Speed (mean) based on stroke length and RPMs.
- Max Piston Speed based on stroke length and RPMs
- RPMs based on desired piston speed and stroke length.
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