Mike
Well-Known Member
There are different formulas for calculating engine displacement in cubic inches, but I've always liked to use this one, as it allows you to figure total displacement for any engine, from a single cylinder on up.
The formula is as follows -
Bore[sup]2[/sup] X Stroke X .7854 X Number of Cylinders
Using the stock bore and stroke of a 350 Chevrolet, we can test the formula.
Bore X Bore (or Bore[sup]2[/sup]) is 4.000 X 4.000 = 16.000
Multiplied by the stroke of 3.480 = 55.680
Multiplied by .7854 = 43.731072 (which is the displacement of one cylinder)
Multiplied by 8 (number of cylinders) = 349.848576, which is rounded up to 350 cubic inches.
Keep this formula handy and you will always know your 350 will be a 355 after being bored .030 or a 360 after a .060 overbore. Go ahead and give it a try.
The formula is as follows -
Bore[sup]2[/sup] X Stroke X .7854 X Number of Cylinders
Using the stock bore and stroke of a 350 Chevrolet, we can test the formula.
Bore X Bore (or Bore[sup]2[/sup]) is 4.000 X 4.000 = 16.000
Multiplied by the stroke of 3.480 = 55.680
Multiplied by .7854 = 43.731072 (which is the displacement of one cylinder)
Multiplied by 8 (number of cylinders) = 349.848576, which is rounded up to 350 cubic inches.
Keep this formula handy and you will always know your 350 will be a 355 after being bored .030 or a 360 after a .060 overbore. Go ahead and give it a try.
