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LS2 Bore size max?

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Old Oct 23, 2013 | 10:53 AM
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Default LS2 Bore size max?
I was wondering what an LS2 can be bored to & what the strength differences are between them?
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Old Oct 23, 2013 | 07:16 PM
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sleeved or no? i believe ERL wet sleeves to 4.185" (185 over from a stock 4") but thats like the absolute max. atleast thats what ive been told.
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Old Oct 23, 2013 | 07:31 PM
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factory sleeves
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Old Oct 23, 2013 | 08:34 PM
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4.030" is common.
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Old Oct 23, 2013 | 08:53 PM
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Originally Posted by KCS
4.030" is common.
do you know if 4.030 makes LS2's weaker, I am thinking of them being like LS1's which cannot be bored more than a clean up .002-.003
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Old Oct 23, 2013 | 11:34 PM
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4.005-4.010 is the most common and safe for most all applications
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Old Oct 24, 2013 | 07:58 AM
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Originally Posted by dphc18
do you know if 4.030 makes LS2's weaker, I am thinking of them being like LS1's which cannot be bored more than a clean up .002-.003
Well if you remove material, its not going to make it stronger. LS2 blocks are not like the LS1 blocks, they can be opened up bigger but you have to consider how much power you want to make.

ERL offers a stock sleeve LS2 short block at 4.030" for a "street turbo" application (V1). I would think it could take a pretty decent amount of power, considering what people are doing with "street cars" these days, but they can probably tell you the most power someone has put to one of those.
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Old Oct 24, 2013 | 08:54 AM
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Originally Posted by leeluther252
4.005-4.010 is the most common and safe for most all applications
agreed. I wouldn't advise trying to go 4.030 on factory sleeves.
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Old Oct 24, 2013 | 09:03 AM
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We dont go past 4.010 on those blocks.
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Old Nov 1, 2013 | 05:13 PM
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I took mine out to 4.030" and this happened.



Granted that was with boost, but still.
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Old Nov 8, 2013 | 05:41 PM
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I took mine out to 4.030" and this happened.
That damage doesn't necessarily mean it was from the liner being too thin, but just too much stress on the aluminum block.
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