Figureing out CC's by bore and stroke

[durgam_K]

Whats the formula for figureing out the CC's of an engine, with the bore and stroke? And number of cylinders obviously.
Thanks , Kris

 

[pumps]

See if this helps.
http://www.online-calculators.co.uk/volumetric/cylindervolume.php

 

[Dusty]

This is what I have used
Bore 2 x .7845 x Stroke = cu. in.
cu. in. x 16.39 = c.c.
I hope this helps. All this is for one cylinder.

 

[Tech7]

If I remember correctly, it's 2 x pi,(3.14) x radius,(half the bore), x stroke x the number of cylinders.

 

[durgam_K]

I found a engine size calculator today, but its in my favorites on my work PC. It needs the bore, stroke, and number of cylinders, and VIOLA!

I was just figureing what size some of the overbores equal out to in CC's. Thanks guys!

 

[Travis]

Volume of a cylinder:

Volume = pi * radius squared * height

You have diameter.. so divide that by two then multiply that number by itself (raidus squared). Then multiply that by 3.14159265 (pi) and the height. If your diameter and height are in millimeters, that will give you cubic mm. To get cubic cm (cc), take your answer and divide by 1000. Obviously multiply that by the number of cylinders.

XS650 with 75mm bore and 74mm stroke:

75/2 = 37.5 = radius
pi*37.5*37.5*74 = 326921.9855
326921.9855/1000 = 326.922
326.922*2 = 653.844