What are the true formulas

[lt250racer]

I am looking to find displacement, with over bores included.

Also how to calculate compression.

[lt250racer]

Displacement = Stroke * PI * (Bore / 2)squared * # of cylinders

Note that when Stroke and Bore are expressed in inches, displacement is solved in units of cubic in (ci). If Stroke and Bore are expressed in mm, then calculated displacement (in cubic mm) must be divided by 1000 to be expressed in cubic cm (cc).

[lt250racer]

Stock:
64.8mm * PI * (70mm/2)Squared = 249379.62/1000 = 249.38cc

1st Overbore:
64.8mm * PI * (70.25mm/2)Squared = 251164.08 /1000 = 251.16cc

2nd Overbore:
64.8mm * PI * (70.50mm/2)Squared = 252954.91 /1000 = 252.95cc

3rd Overbore:
64.8mm * PI * (70.75mm/2)Squared = 254752.10 /1000 = 254.75cc

4th Overbore:
64.8mm * PI * (71mm/2)Squared = 256555.65 /1000 = 256.55cc

5th Overbore:
64.8mm * PI * (71.25mm/2)Squared = 258365.56 /1000 = 258.36cc

6th Overbore:
64.8mm * PI * (71.50mm/2)Squared = 260181.83 /1000 = 260.18cc

7th Overbore:
64.8mm * PI * (71.75mm/2)Squared = 262004.46 /1000 = 262.00cc

8th Overbore:
64.8mm * PI * (72mm/2)Squared = 263833.46 /1000 = 263.83cc

[climb any hill]

Here you go >> http://www.everything2stroke.com/resource/displace.php

[superevil]

jesus christ that is confusing