Calculating displacement!

Tripper · Mar 10, 2008

Since I bored my Nailhead .03 over... I wanted to re-figure the displacement. I found this simple formula for doing so...

Bore X bore X stroke X .7854 X # of cylinders = displacement

BoB

Unkl Ian · Mar 10, 2008

There are several online displacement calculators as well.
http://www.bgsoflex.com/displacement.html

cycledog · Mar 10, 2008

Also if you want to go from liters to cid or the other way the factor is 16.39

4.3L for example is 4300 divided by 16.39 = 262.35 cid. multiply to go the other way. 350cid x 16.39 =5,736 or 5.7L

HOT40ROD · Mar 10, 2008

Tripper that the one I alway used. But the one unki has is so much easlier.

Willowbilly3 · Mar 11, 2008

cycledog said:
Also if you want to go from liters to cid or the other way the factor is 16.39

4.3L for example is 4300 divided by 16.39 = 262.35 cid. multiply to go the other way. 350cid x 16.39 =5,736 or 5.7L

I always have to remember that a 1000cc Harley was a 61 c.i.

wyattjosh43 · Mar 11, 2008

cubic inches

Havent messed around with a nailhead, but a small block chevy .30 350ci would make 355, and a .60 would produce 360ci. If your under 400ci I think you add 5ci per cut and above 400ci you would make 10ci per cut assuming stock stroke, rod length and deck height.

Calculating displacement!

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Calculating displacement!

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