LS1 vs LS2 block head sealing

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Mar 19, 2018 | 06:18 PM

BURL

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Pro

Joined: Sep 2014

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From: Hills of Tennessee TN

LS1 vs LS2 block head sealing

I'm planning a LS build possibly with a new LS2 block. It occurred to me that there is less material in the 4" bore LS2 block between the cylinders. I'm planing a max of 15 PSI with meth on gas. Compression approximately 10:1. Anyone with FI experience with these blocks feel that this reduced material is significant or am I trying to pick the fly crap out of the pepper with this minor difference?

Mar 19, 2018 | 08:18 PM

stevieturbo

Melting Slicks

Joined: Jul 2004

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From: Northern Ireland

LS2 block will easily be able to handle that...and then some...and then a bit more.

Although it staying at that low boost, maybe consider an LS3 for a few more cubes ?

Mar 19, 2018 | 08:40 PM

BURL

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Pro

Joined: Sep 2014

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From: Hills of Tennessee TN

Quote:

Originally Posted by stevieturbo

LS2 block will easily be able to handle that...and then some...and then a bit more.

Although it staying at that low boost, maybe consider an LS3 for a few more cubes ?

Remember I concerned about sealing not structural integrity. I know the LS2 block can handle the stress of the 15 PSI but is the reduced material between the bores of any significance relative to sealing? That may be what you meant but just double checking.

Mar 19, 2018 | 09:44 PM

ysb02

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Joined: Aug 2008

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The slightly reduced area bw cylinders doesn’t really matter. Ls2 is a gen 4 block while the ls6 is gen 3. It’s a better design throughout and id use it over a gen 3 block.

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