Where are the cubes?
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 1,166
Likes: 0
From: Tulsa Ok
Re: Where are the cubes? (Lohkay)
I came up with 382.66719 which is close enough but am kinda curious about the .7854 thing.
I was told there would be no math after I got out of school. :sleep:
I was told there would be no math after I got out of school. :sleep:
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Re: Where are the cubes? (GregP)
I think the actual formula, though all of these mentioned above are a derivation of this one is:
volume of a cylinder = pi x r^2 * H
whereas: pi = 22/7 or 3.1429
r^2 = the square (any number times itself) of the radius of the cylinder; r = d/2
d = diameter of the cylinder
H = height of the cylinder; i.e. the stroke of the crank
so to calculate displacement the formula is:
engine displacement = # of cylinders x volume of the cylinder
or:
Disp = # of cylinders x pi x r^2 x H
in the case of the historical 383 engine the formula tells us:
Disp = 8 x 3.1429 x (4.030/2)^2 x 3.75
= 8 x 3.1429 x (2.0150)^2 x 3.75
= 8 x 3.1429 x 4.0602 x 3.75
= 8 x 47.8334
Disp = 382.6672 cu in
Hope this helps.
Just for fun try a 0.030" overbore on an aftermarket 400 block with a 4-1/8" stroke crank. I'm gathering parts for this currently.
Aaron
volume of a cylinder = pi x r^2 * H
whereas: pi = 22/7 or 3.1429
r^2 = the square (any number times itself) of the radius of the cylinder; r = d/2
d = diameter of the cylinder
H = height of the cylinder; i.e. the stroke of the crank
so to calculate displacement the formula is:
engine displacement = # of cylinders x volume of the cylinder
or:
Disp = # of cylinders x pi x r^2 x H
in the case of the historical 383 engine the formula tells us:
Disp = 8 x 3.1429 x (4.030/2)^2 x 3.75
= 8 x 3.1429 x (2.0150)^2 x 3.75
= 8 x 3.1429 x 4.0602 x 3.75
= 8 x 47.8334
Disp = 382.6672 cu in
Hope this helps.
Just for fun try a 0.030" overbore on an aftermarket 400 block with a 4-1/8" stroke crank. I'm gathering parts for this currently.
Aaron
