I've got a good 400 block. If I bore it out 30 over and use the stock crank what would my CI be? Thanks.

Bore x Bore x Stroke x .7854 x Number of Cylinders=C.I.
Example in this instance: 350 Chevy
Bore = 4.00"
Stroke=3.48"
Number of Cylinders= 8
4.00x4.00x3.48x.7854x8=349.8486 cubic inches, Rounded to 350

you would have a 400 or to be exact a 4.o4,,zoom zoom,rd

If I started with a 400 CI block and bored it out 30 over and used the stock 400 crank I'd end up with what???Remember this is a 400 block not a 350. I know I cought somebody sleepingzgator2007-07-24 16:41:49

I come with a 406.774. This is possibly wrong or should I say probably wrong. If a standard 400 has a  bore of 4.125 and a stroke of 3.75 and you're boring it .030 over, 4.125 + .030 = 4.155

4.155 X 4.155 X 3.75 X .7854 X 8 = 406.77495

OK Joel, tell is the right answer.

Doesn't seem like much but the numbers check.

Jim is correct.

Thanks guys. This is going to be my next engine build. It's still on paper but I do have the engine.