Calculating engine displacement

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Dr.Evil

No Dif Pin!
Joined
Oct 13, 2002
Messages
905
Reaction score
1
Location
Sparks, Nevada
I am just courious as to what size (displacement) the following engine would be:
3.0 Bored .030 over
crank turned .10 under and indexed
I know the boring .030 over added a few cubes, but what about about the ofset ground crank/indexing?

Does anyone have the stock bore and stroke for the 3.0?
Thanks
 

AutoSHO

No SHO = Mo $$$
Joined
Jan 16, 2001
Messages
6,979
Reaction score
17
Location
Fort Collins, CO
The formula for finding displacement in cubic inches is:

(Pi/4) * (Bore)^2 * Stroke * # of Cyls

For a .030" over 3.0,

3.141592654/4 * (3.53)^2 * 3.15 * 6 = 184.97 cubic inches.

Divide that number by 61.024 to get the displacement in liters: 3.03L.

I'm not sure if I understood your post correctly, but it sounds like you're just having the rod journals machined undersize, which does not change stroke. If you are having them offset ground .01", then...

3.141592654/4 * (3.53)^2 * 3.16 * 6 = 185.56 Cubic Inches = 3.04L
 
Back
Top