02SS:ZEUS

iTrader: (16)

What is the stock bore on an LS1? I'm looking to buy an Eagle rotating assemble with a 4.100" stroke to take the car to 393ci. It says the available bore size is 3.905". Is this stock bore, or will the block need to get machined?

PREDATOR-Z

3.898
block will need to be honed.

Some advice, stick with 4.00 stroke

02SS:ZEUS

iTrader: (16)

Why the 4.00 stroke? Would the block still need to be machined? Does the block need to be honed with all stroker kits?

PREDATOR-Z

Yes the block needs to be honed regardless. The block also needs to be clearanced for 4.00 stroke and above.

The reason I say stay with 4.00 stoke is a longer stroke will have some oil consumption issues due to the length of th LS block sleeves.

A 4.00 stroke will last much longer (more reliable)