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Discussion Starter · #1 ·
To calculate the displacement of your engine in cc's use this simple forumula:
bore x bore x stroke x .0007854 x #of cylinders = displacement

As a builder I use this formula quite often to determine engine size, try it for yourself you may be surprised. Here is an example of a blaster with a 240 big bore kit on the first bore:
72x72x67x.0007854=232.08cc
 
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