Quote:
Originally posted by SnellCRP
To get cc displacement of your stroker use this formula: (bore x bore x 0.7854 x stroke x number of cylinders). For example if you had a 440 piston and a 4mm stroker crank it would calculate like this: 89 x 89 x 0.7854 x 74 x 1 = 460365.3516 so your cc would be 460cc. To test the equation you can replace the #'s with the stock #'s to verify the equation is accurate. 85 x 85 x 0.7854 x 70 x 1 = 397216.05 so you know what the stock cc's of your EX are (397cc's) you have just verified the equation is correct. Good luck with your build and keep us informed with your progress.
:D
Just to clarify the fine details. Stock bore is 85mm, stock stroke is 70mm. If you convert these two to centimeters, just move the decimal place left one digit, so the bore is 8.5cm and the stroke is 7.0cm.