What block are turbo users using?
well you said the block keeps cracking, making it sounds like a persisting problem. And the nissan dealer thing was a reference to this fuckshow--> https://ls1tech.com/forums/generatio...p-our-car.html
A joke
A joke
I think the iron blocks are the way to go short of an after market piece, if you don't mind The extra 75-90 pounds. I use a LS1 block and have a iron 347 waiting to go in. The bottom end is fine on the LS1, but the thin cylinder walls are my main concern.
LS1 block with forged rods pistons is good to around 700rwhp. I've read beyond that with extended street use (non race) that the rings lose their seal as the bores get out of round. A rehone and new rings will cure it for another few thousand miles until it happens again.
LS2 alum blocks are good for beyond that. With high HP setups 1000rwhp+ over time the cylinder bores can crack. I believe Mike Brown had this happen to him. He went low 8's with stock alum LS2 block/crank and good rods/pistons, out of the box AFR225 heads! Most resleeve at this point if a sleeve cracks or simply get another block which is cheaper....
6.0 iron block is structurally stronger and cylinder walls aren't prone to moving/cracking. Weight penalty of 80lbs though.
At around the 1000rwhp mark is when the stock 4 bolt head gasket design can't really keep a seal and will either push water or fail with all 4 bolt design blocks. Double O-ring seems to be the choice at this point to keep it together.
1000rwhp is going to make any car seriously scoot. If you need more be prepared to dig deep into your pocket continually because stuff fails or the quality stuff that doesn't fail is big $$$$'s.
LS2 alum blocks are good for beyond that. With high HP setups 1000rwhp+ over time the cylinder bores can crack. I believe Mike Brown had this happen to him. He went low 8's with stock alum LS2 block/crank and good rods/pistons, out of the box AFR225 heads! Most resleeve at this point if a sleeve cracks or simply get another block which is cheaper....
6.0 iron block is structurally stronger and cylinder walls aren't prone to moving/cracking. Weight penalty of 80lbs though.
At around the 1000rwhp mark is when the stock 4 bolt head gasket design can't really keep a seal and will either push water or fail with all 4 bolt design blocks. Double O-ring seems to be the choice at this point to keep it together.
1000rwhp is going to make any car seriously scoot. If you need more be prepared to dig deep into your pocket continually because stuff fails or the quality stuff that doesn't fail is big $$$$'s.
