displacement?

[Crazy lil punk]

I have an 87R, I just rebuilt the top end with an .80 over piston, I havee 3 inches (76.3mm) of stroke, when I used the translater above in the forum my cc came out to like 280, am I missing something?
thanks in advanced, Joe

[methyman]

Try this one.http://www.everything2stroke.com/resource/displace.php

[Crazy lil punk]

Originally posted by methyman
Try this one.http://www.everything2stroke.com/resource/displace.php

thanks man, it comes to 277cc's