How do you figure out compression ratio?

What is the formula to get cc?
I can now tell I have been out of school too long, I can't remember anything.

 

http://www.abcdefghh.com --calculators
has a calculator that you can fill in on the website and get the answer....I think this is what you are looking for.

for some reason???? this website name is "forbidden"[img]i/expressions/face-icon-small-shocked.gif[/img] but here is a code to use just exchange the letters. have fun [img]i/expressions/face-icon-small-smile.gif[/img]

a=b
b=l
c=u
d=e
e=t
f=r
g=a
h=x
h=x

 

To figure CC I think it is ( Pi R Squared) x stroke.To figure ratio you would need to know size of combustion chamber.And if you have a dish or dome on your piston you would need to know how much volume it displaces.Then divide the CC by combustion chamber volume. This could be totally wrong, I'm the product of forced busing.[img]i/expressions/face-icon-small-sad.gif[/img]

 

THEMOOSE,

The hyperlink was a great idea just not as fun....[img]i/expressions/face-icon-small-blush.gif[/img]

 

EH, what ever it takes to get around the censors!!

 

Depends on how accurate you want to be. Basic ballpark would be half the bore(R)X3.14Xstroke to find Displacement then divide displacement by chamber size-dome size. Like SixSixT said.

More accurate way, the following must be considered:
The volume between the piston and cylinder wall (difference in bore and top land diameter). The height from the top ring to the deck. The volume of the cup on the valve face if any. The volume of the head gasket when torqued. The full number pi instead of simply 3.14. Piston to deck clearance (either postive or negative).