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CI Displacement Forumla????

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Old 05-07-2004, 02:40 PM
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Default CI Displacement Forumla????

Can someone post it?
Old 05-07-2004, 02:44 PM
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this is not perfect, but here goes: ___Litre X 61.15 =_____ cubic inches
Again this is not perfect but it will give you a ball park figure
Old 05-07-2004, 02:47 PM
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π x (radius)2 x stroke x number of cylinders
Old 05-07-2004, 03:19 PM
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Originally Posted by DenzSS
π x (radius)2 x stroke x number of cylinders
Usually I use this one for quick calculations although its the same thing in different order:

bore x bore x stroke x pi / 4 x 8cyl
Old 05-07-2004, 04:04 PM
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http://www.rosspistons.com/calculator.php
Old 05-08-2004, 01:20 AM
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http://www.smokemup.com/auto_math/index.php
Old 05-08-2004, 06:50 AM
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i always used bore x bore x stroke x .7854 x number of cylinders, what joseph said except .7854 is pi/4
Old 05-08-2004, 10:52 PM
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Displacement Calc

Formula is:

All units are inches.
Cylinder Area = PI * (Bore / 2)^2
Cylinder Volume = Cylinder Area * Stroke
cuin displacement = cylinder volume * number of cylinders.
Old 05-09-2004, 12:58 AM
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radius squared x stroke x pi(3.1416) x 8 = cubic inches...
Old 05-09-2004, 03:48 PM
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bore x bore x stroke x # of cylinders x .7854
Old 05-09-2004, 10:31 PM
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bore x bore x stroke x 6.2832 = ci v8
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Old 05-10-2004, 07:33 AM
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Originally Posted by hondakiller
i always used bore x bore x stroke x .7854 x number of cylinders, what joseph said except .7854 is pi/4
Yep. Notice that 7854 are the numbers in the upper left corner of a calculator keypad. No need to remember them, just start in the upper left corner and go clockwise.




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