3.671 plus 0.030 is 3.701, about 310 cid. Maximum bore is about 3.8583 (98mm).
A 350 engine typically has a standard bore size of 4.000 inches. When it is "bored 30 over," it means the bore has been increased by 0.030 inches. Therefore, the bore size of a 350 bored 30 over is 4.030 inches.
stock bore is 4.32 inches, so 30 over would be 4.35 inches
355
the answer is 357 ci (and some change).
Displacement of "350 bored 30 over" seems to refer to an engine specification, likely indicating a 350 cubic inch engine with a bore size of 30 over (30 thousandths of an inch larger than the standard bore). This means the engine's cylinders have been bored out to accommodate larger pistons, increasing the engine's displacement. The exact displacement can be calculated based on the new bore size and the stroke of the engine. However, additional information, such as the stroke length, is needed for a precise calculation.
A 305 has a 3.736" bore and a 3.48" stroke. The formula for volume of a cylinder is pi times the radius squared times the stroke times the number of cylinders. So a 3.766 diameter (.030" over) has a radius of 1.883. radius squared is 3.545 times pi is 11.139. times stroke is 38.764. times 8 cylinders is 310.1. So, a 305 bored 30 over is called a 310.
A 444 cubic inch engine bored 30 over has an increased displacement due to the larger bore size. Boring an engine 30 over typically means increasing the bore by 0.030 inches, which can slightly raise the total displacement. To calculate the new displacement, you would need to know the original bore and stroke dimensions, but generally, the increase is minor, around a few cubic inches, leading to a final displacement of approximately 446 to 447 cubic inches.
A small block Chevy has a 4inch bore. When you bore one 30 what you are doing is removing .30 thousandths from the cylinder. That would make the bore 4.030 or turn a 350cid into a 355cid.
A .030 bore alone wouldn't add enough horse power to even feel. Now, add flat top pistons, a good cam, headers, maybe a decent set of heads and carb you'd see improvement. But if you added that to a stock bore 305 you'd see the same results.
it is a 30 over 350
it would be a 360. if .30 over is 5 cubic inches then .60 over would be 10 cubic inches
30 caliber bore brush.