CamaroRS1989

Just wondering what are the cubic inches of these motors?

350 bore.30 over=355
350 bore.60 over=?
350 bore.30 over w/383 crank=?
350 bore.60 over w/383 crank=?

Or what makes a 350 become 383ci?

Any other motor ci combos you know post them.
Thanks,
Carl



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1989 Camaro rs 2.8 v6
Blue w/white stripe
T-Tops 2-15" PG x-max's

1999 Blazer 4dr 4x4
For Sale

vic_V8

350 + .30 over + 400 crank = 383 stroker

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late model 91 rs
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next month: rest of ultimate tbi

AlkyIROC

350 + .060 + 400 crank = 388
350 + .060 = 360

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Scott_92RS

To find cubic inches, use this formula:

(3.1415 * (Bore/2)^2) * Stroke * 8

Bore/Stroke sizes for common engines are listed here:

http://home.golden.net/~appster/text.january.html

When people say "30 over" or "60 over" they mean 30 or 60 thousandths of an inch, so really, its 3 or 6 tenths of an inch, so when adding the overbore to the bore size, it would look like this:

4.125" + .030" = 4.155" (406 cubic inches with a 3.75" stroke)


[This message has been edited by Scott_92RS (edited September 26, 2001).]

RICH92RS350

350 Block:
4.00" Bore and 3.48"stroke=350"
4.00" Bore and 3.75"stroke=377"
4.03" Bore and 3.48"stroke=355"
4.03" Bore and 3.75"stroke=383"
4.06" Bore and 3.48"stroke=360"
4.06" Bore and 3.75"stroke=388"
400 Block:
4.125"Bore and 3.75"stroke=400"
4.125"Bore and 3.48"stroke=372"
4.155"Bore and 3.75"stroke=407"
4.155"Bore and 3.48"stroke=378"
(#'s rounded)