4.040". The standard bore is 4.00".
Each cylinder has been re-bored to a diameter .030" larger than it came from the factory. .030 oversize isn't much. It's done to correct slight cylinder tapering and to put the engine back into condition that it will last. It really isn't enough size difference to produce noticably more horsepower. Note that when the cylinder is bored .030 over, you'll also need pistons and rings that are manufactured to that size.
A 350 starts out with a 4.000" bore and a 3.48" crankshaft stroke which really only gives you 349.8 cubic inches. (Chevy rounded it up to 350) Your engine which has the same stroke of 3.48 but now is bored .030" over (making the cylinder bored size now 4.030) total size of 355.1 cubic inches or just a 355.
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.
A Chevy 305 engine bored .040 over would typically be referred to as having a +.040 bore, indicating the increase in bore diameter from the standard size. This modification can increase the engine's displacement and potentially enhance its performance.
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 3 cylinder engine : Compact in size, cheaper to built, light in weight, Less fuel consumption. 4 cylinder engine: bigger in size, smoother sounding than 3 Cylinder engine.
I just got my cylinder back from millennium technologies they bored the cylinder to the stock piston size that was 1.888 and honed the cylinder to 1.890.
It means that the cylinder has been bored over what its original size was and now has a larger piston than what it was originally manufactured with. It means a slightly larger displacement than before and most times gives more power.
A 4.8Liter engine is an 8 cylinder engine...
a Chevy 350 bored .060 over would be 360.4 cubic inches
multiple cylinders create better torque, efficiency, and are better balanced. In addition, the same identical size engines would have large differences in piston size/weight, rod size/weight, bearing stress, etc.
Depends on if (and how may tmes) the cylinder has been bored.