3.498 bore with 4.25 stroke
That'd be a motor with a 90.5 mm stroke and 69 mm bore.
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 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 = 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.
BORE is 3.740 and the stroke is 3.480
Bore 4.250" Stroke 4.00"
4 inch bore, 3.5 inch stroke.
4.312 bore x 3.50 stroke.
4.00 bore 3.48 stroke
The bore would be 4.310" and the stroke is 4.00"
bore 3.497 stroke 3.81
4 inch bore. 2.87 inch stroke.