Bore = 4.00 inches
Stroke = 3.48 inches
Measure cylinder bore with heads off, measure crank main center-line to rod main center-line then multiply by 2 to get stroke. Stock Chevy 350 is as above.
The bore and stroke is---3.740 bore and 3.480 stroke. STOCK 305
bore 3.497 stroke 3.81
3.498 bore with 4.25 stroke
That'd be a motor with a 90.5 mm stroke and 69 mm bore.
4.310 bore X 4.250 stroke -- basically a 454 bored .060 over with a 1/4 inch longer stroke crankshaft as compared to the 4.250 stock bore size and 4.000 inch stroke of a 454. Just as an aside FYI, 427's have the same stock bore size as a 454's but have a 3.760 stroke.
The advertised Bore in inches is 4.125 The advertised stroke in inches is 3.750 That is factory stock info.
It refers to the throws of the crankshaft/distance the piston moves. It usually is compared to the bore of the engine. An example a 302 4"bore x 3"stroke is a short stroke motor, by comparison a 5.4L ford v8 3.552" bore x 4.165" stroke.
Bore it out to the maximum "safe" bore (.060" overbore) which is 3.935". Stroke it to 3.25". This is the stock stroke for the 327 engine, which is the only other engine to have the smaller journals. Rod Journals are 2.00", Main Journals are 2.30".
Stock is 1600 cc or 1.6 liter. The bore and stroke are 85.5mm and stroke is 69 mm.
It would probably be close to a 340 as the 340 is the same engine block as the 318. The stock 318ci has a 3.910 in. bore with a 3.31 in. stroke the very same stroke as a 340ci. The stock 340ci has a 4.04 in. bore. The .060 in. over bore would result in a 328ci engine. The formula for this is, 1/2 bore x 1/2 bore x 3.14 x stroke x number of cylinders.
bore X bore X stroke X .7854 = displacment 47mm bore with a 49.5 stroke 47 x 47 x 49.5 x .7854 = 85.879 86cc motor bore X bore X stroke X .7854 displacment 47mm bore with a 49.5mm stroke 47 x 47 x 49.5 x .7854 85.879 86cc motor Wat??? 47 x 47 x 49.5 x .7854 85879.9557. How is that an 86cc motor? How about 47 x 47 x 49.5 x .0007854? 85.8799557 or 4.7cm x 4.7cm x 4.95cm x .7854 85.8799557 Do your math before you post wrong answers.
BORE is 3.740 and the stroke is 3.480