97-98 LS1 block overbore limit??
97-98 LS1 block overbore limit?? Hi there,
I read somewhere that the earlier LS1 blocks 97-98 can only be bored .005-.010" because of thinner wall liners. Plus they do not have the oiling capacity of the 2000 and up blocks? Anyone out there have a performance rebuilt 97-98 LS1 please chime in. thanks
I read somewhere that the earlier LS1 blocks 97-98 can only be bored .005-.010" because of thinner wall liners. Plus they do not have the oiling capacity of the 2000 and up blocks? Anyone out there have a performance rebuilt 97-98 LS1 please chime in. thanks
The 01+ blocks were LS6 blocks with better oil flow. This is true.
The most I'd take any of the LS1/6 blocks out to is 3.905" but you should be safe with a 3.903" allowing for one additional rebuild if needed in the future.
The most I'd take any of the LS1/6 blocks out to is 3.905" but you should be safe with a 3.903" allowing for one additional rebuild if needed in the future.
Most piston sets can be ordered .003" or .005" over. If the block is in good shape and can get by with less, I'd do the minimum so you have enough left over for a rebuild down the road.
Typical SBC overbore pistons are .030 Sounds like newer engines wear less so is a typical overbore piston size .005?
The LS1 is an aluminum block motor with cast iron sleeves...the thickness of the sleeves is what limits the max overbore on these motors. Ive always heard 97-98 LS1's can only tolerate a .005" overbore max. I know Mahle makes the stock pistons and also makes a 3.908" bore forged piston for Ls1's which I ran in my old car. It was a 98 Z28 but the block was a 2002. I can attest that the later blocks can be bored .010" over with no issues. Not all 2001 -2002 blocks are LS6 blocks...only a small percentage are.
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