Originally Posted by MRJLB84D
just wondering how many tho over you can bore a 460 block??
seen stroker kits going out to 557 at .80thou over.... surely at .80thou the bores wouldnt have much left in them???
Some 429/460 blocks can go .060", some can go .080", and some have been known to go 4.500" bore (0.140" over).
It depends on the block, it depends on the criteria used as far as what you allow your minimum cylinder wall thickess to be, it depends on other factors such as rod angularity and resulting side-thrusting (side loading) on the cylinder walls, whether the block is naturally aspirated or uses a power adder such as a blower, nitrous, nitro, etc. Best thing to do is sonic check the block and see what your options are.
Incidentally, you can always build a .030" overbore stroker with the 4.5 stroke kit and make a 545 cube engine. The 557 (.080" overbore vedrsion) can come later. In other words, save your bigger overbores for future use and thereby increase the life of youre cylinder block, as 95% of the power increase in the stroker motors comes from the stroke
increase compared to the bore increase.