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Old 07-17-2002, 05:19 PM   #8
PKRWUD
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Location: Ventura, California
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4 notches means the same piston can be used in any cylinder.

The formula is as follows:

Cylinder volume for a 302 is 617.78cc.
The space above the top ring, and the space for the 4 notches, is 5.5cc.
The average head gasket has a crushed thickness of .047", which equals 9.68cc.
Your combustion chamber size is 58cc.
Add them all together and you have total cylinder volume:

617.78 + 5.5 + 9.68 + 58 = 690.97cc

Now, you divide that number by the total volume above the piston, or

58 + 5.5 + 9.68 = 73.19cc

690.97cc / 73.19cc = 9.4407705:1 Compression Ratio.



Take care,
-Chris
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