Calculating Cubic Inch Displacement & Compression Ratio

The following tools are compliments of Randy Adamson! Thanks Randy!

Cubic Inch Displacement & Compression Ratio

Sample: V8 Engine with 4.030 bore, 3.500 stroke, .036 head gasket thickness, 4.075 head gasket diameter, .015 deck clearance, .360 ring land height, flat top piston w/2cc valve relief, and 70 cc head volume should give you a CID of 357.15 with a static compression ratio of 9.82:1.

NOTE: For this calculator to work - you must have Java Script enabled, Netscape 4 and IE 4 or greater should be fine!

Edit data, press button

Erase and start from scratch

Bore Size, inches	Piston Size, inches	Stroke, inches	Cylinder Head Volume, cc's	Piston Dome/Dish Volume, cc's
"	"	"	cc's	cc's
	Head Gasket Bore Size, inches	Head Gasket Thickness, inches	Piston Ring Land Height, inches	Deck Height, inches
	"	"	"	"
Engine Size Liters:	Cylinder Volume:	Gasket Volume:	Deck Volume:	Total Volume:
cl's	cc's	cc's	cc's	cc's
Compression Ratio:		Engine Size in Cubic Inches
:1

Go to Stuck in the 70's main page

If you have any comments contact armadillo0@earthlink.net

Note: Feel free to save this to your local drive, copy paste what ever works for you and have your way with it. It is very portable and self contained (no server script, just plain old java).

Excel Gear Ratio Chart (right click to save to your hard drive or left click to launch)

Sample picture of Excel spread sheet

The Excel sheets contains drop down menus for RPM, Tire size, and Axel Ratio. Many Ford and Chev tranny ratio's are also listed or you can enter your own.