Ls2 cylinder service question

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Aug 13, 2011 | 03:32 PM

dstappity

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Ls2 cylinder service question

What is the max service spec for a 05 ls2? I have searched and got no solid answer. 10 people say the max is .006 then another 10 say its .060, then another 10 say .030.

I is confused, Can anyone help with some solid, Accurate info on this? I will be turbo-ing this engine.

Thanks in advance.
Daniel

Aug 14, 2011 | 02:10 AM

rsz288

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Quote:

Originally Posted by dstappity

Ask a dealer what over size pistons are available. After that which is a solid GM engineering view, everything else is really just an opinion.

Aug 18, 2011 | 10:30 PM

topdrop04

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im pretty sure its .060 there is car in formula d that has a ls2 built but heintz in nc thats a 6.6

Aug 18, 2011 | 10:31 PM

rsz288

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Quote:

Originally Posted by topdrop04

im pretty sure its .060 there is car in formula d that has a ls2 built but heintz in nc thats a 6.6

Thats a long shot with factory liners.

Aug 18, 2011 | 11:32 PM

dstappity

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Staging Lane

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Dealer tells me they only have a .005 over piston available.

Aug 19, 2011 | 03:45 AM

rsz288

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Quote:

Originally Posted by dstappity

Dealer tells me they only have a .005 over piston available.

Pretty much an indicator of what GM thinks works.

Aug 19, 2011 | 10:43 AM

Sales4@Texas-Speed

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We have seen some people go 4.030" on an LS2 block but that is not something we would ever do because it kills a lot of sleeve. You don't pick up much power at all, so IMO it's not a good idea because it kills the blocks ability to hold big power.

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Aug 20, 2011 | 10:04 AM

FlamingTA

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The common thing is .005 over or .010. GM has the max spec at 4.020. From what I have heard the sleeves are .100-.105. Even at 4.03, which I am doing, you still have thicker sleeves then a stock LS1 sleeve.

On that data I would ask, what are your plans for the motor? If you do big FI or big N2O shot, I would stay at the 4.005 or so spec. Off the shelf pistons are really easy to come by on that bore.