Flyer

iTrader: (1)

How far can you usually bore a stock block? I just got one and would love to be able to take it out to 4". Is that usually to much?

z98

What block? Year, original application would help

badls1

iTrader: (1)

aluminum ls1/ls6 3.89 to 3.905 if you have lq4 block which is 4" bore could go as much as 4.06" safely. if you want bigger bore need resleeved block or c5r block

Flyer

iTrader: (1)

99-01 and not sure on the original application.

Are you saying the block, in it's priginal form can't be bored out any?

Beast96Z

iTrader: (21)

LS-1 blocks are sleeved. You can't really bore a sleeve to much. There only so thick. Boring or honing I might say, should only be taken to around 3.905. You won't really pick up any cubes from it. Best thing to do is by a 4.00" crank and build a 382 with the stock bore.

Mike K.

Like they said above if you want to stick with the aluminum block and not sleeve it a clean up bore is all you can really do to 3.905,