How strong is the ls2 block?
10-09-2005, 04:06 PM
#1
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How strong is the ls2 block? Ive been kicking around the idea of bulding a big bore motor to take advantage of bigger valve heads.Im looking at the darton sleeve block but that is pretty pricey.But now i was thinking about the new ls2 block i know its not as big of a bore but its a 4inch and that seems to be what you need for big valve motors.I know most people will say go iron but i just don't want the weight.So whats your thought on the ls2 block pros cons let me know.BTW this motor will have a direct port so i don't know how well they handle the bottle.Thanks mike
10-09-2005, 04:28 PM
#2
The LS2 blocks are stronger because there is aluminum between the cylinder bores. The LS-1/6 blocks were hollow between the cylinders. If you were considering the Darton MID LS6 block, you should consider the LS2 dry sleeve block from Darton. It roughly $1000 cheaper than the MID and still pretty damn strong.
10-09-2005, 07:28 PM
#3
I am building a 403 ls2 and my machinist said it was the first time he had honed an aluminum block where the torque plate did not measureably distort the bores. He thought it was a very ridgid block. Good luck.
10-09-2005, 09:04 PM
#4
good luck getting that thing squared away. I'm still trying to find some extra $$ so that little thing will just fall into my car this winter.
Tuff maybe you should just use an ls2 and see what happens. as it is you seem to pave the way with most of this stuff. I would have to assume that the block is pretty f**in stong. I would think that lifting the heads would be a bigger issue. correct me if I am wrong but I thought motors with larger displacement created more pressure on the bottle tending to lift the heads moreso than on say a 346.
Tuff maybe you should just use an ls2 and see what happens. as it is you seem to pave the way with most of this stuff. I would have to assume that the block is pretty f**in stong. I would think that lifting the heads would be a bigger issue. correct me if I am wrong but I thought motors with larger displacement created more pressure on the bottle tending to lift the heads moreso than on say a 346.
10-09-2005, 09:21 PM
#5
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Originally Posted by yak
good luck getting that thing squared away. I'm still trying to find some extra $$ so that little thing will just fall into my car this winter.
Tuff maybe you should just use an ls2 and see what happens. as it is you seem to pave the way with most of this stuff. I would have to assume that the block is pretty f**in stong. I would think that lifting the heads would be a bigger issue. correct me if I am wrong but I thought motors with larger displacement created more pressure on the bottle tending to lift the heads moreso than on say a 346.
Tuff maybe you should just use an ls2 and see what happens. as it is you seem to pave the way with most of this stuff. I would have to assume that the block is pretty f**in stong. I would think that lifting the heads would be a bigger issue. correct me if I am wrong but I thought motors with larger displacement created more pressure on the bottle tending to lift the heads moreso than on say a 346.
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10-09-2005, 09:48 PM
#8
I think you'll be just fine. You aren't the first person to spray a LS2 block. With a good set of thicker deck head castings and some studs, you should be able to hold 1000+ hp. There was a 1200hp turbo motor on here a while back that had the TEA/AFR castings and had no trouble with lifting under high boost. That says alot in it's self.
