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What do "engine numbers" mean?.....


jjguitar
05-14-2002, 02:48 PM
When someone says an engine is a "302", a "340", and so on, what is this number referring to?

enginerd
05-14-2002, 02:54 PM
That number is the cid or cubic inch displacement. Standard measures volume with cubic inches. Metric measures volume with literes. If an engine is a 302, that engine displaces 302 cubic inches. The distance between the bottom most point of the piston travel to the top most point of travel is the displacement. 302 cid = 5.0 liters.

ivymike1031
05-14-2002, 04:09 PM
just being anal:

The distance between the bottom most point of the piston travel to the top most point of travel is the displacement.

That's the stroke; the displacement is stroke multiplied by (pi*(cylinder bore)^2)/4, or in simpler terms, (stroke)*(bore area).

jjguitar
05-14-2002, 04:11 PM
lol, thanks!

enginerd
05-15-2002, 07:58 AM
Originally posted by ivymike1031
just being anal:



That's the stroke; the displacement is stroke multiplied by (pi*(cylinder bore)^2)/4, or in simpler terms, (stroke)*(bore area).

Yeah, yeah you got me there.:o

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