Cobras_Rule

iTrader: (4)

What is the formula needed to figure out the displacement of an engine.

I know i need bore and i know i need stroke...
what else?

Steve Bryant

iTrader: (1)

It's Pi (a constant equal to approximately 3.14) times the radius squared (half the diameter of the bore multiplied times itself) times the stroke times the number of cylinders. If the dimensions are in inches, the answer will be in cubic inches. Alternately, if you use centimeters, the answer will be in cubic centimeters.

So that's: Displacement = radius * radius * 3.14 * stroke * cylinders

I hope that this helps.

Steve

405HP_Z06

iTrader: (11)

or

.7853982 * bore squared * stroke * number of cylinders

Old SStroker

Right. To make it easy to remember, use .7854, the four numbers in the upper left corner of a keypad/calculator run clockwise. It is PI/4 rounded a bit and is accurate to a small fraction of a cubic inch of displacement. Actually it it is accurate to about .0008 cubic inches in a 350 V8.


It just makes it easy. You don't even need to remember the exact number. It's on the keypad. That's handy for us older folks.

bore x bore x stroke x number of cylinders x .7854 = displacement

Jon

shoemike

iTrader: (25)

http://www.marcintology.com/tuning/b...kecylinder.xls

Cobras_Rule

iTrader: (4)

ok thx guys. thats what i needed

405HP_Z06

iTrader: (11)