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Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

6.2 max bore

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Old Sep 12, 2009 | 10:28 PM
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From: Battle Creek Mi
Default 6.2 max bore
What is the max bore you can go on the sleeves in a alum 6.2 Sticking with stock stroke and would like go bigger on the bore. 4.125 would be great

I have a scratch in one cyl that .005 will not take out.

I am very impressed with the way these things are built. plus the 96lb block is hard to belive.

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Tim
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Old Sep 13, 2009 | 01:24 AM
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4.100 safley, the problem is that the block is built around the sleeves, so they are not centered. if they were centerd you might get a 4.125 bore out of them. rule of them is minium thickness of .080 for a sleeve
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Old Sep 13, 2009 | 05:54 AM
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Fun looks like a custom piston for the L92

How bad is it to press a new one in. Custom piston vs shelf with new sleeve

Tim
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Old Sep 13, 2009 | 10:24 AM
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Originally Posted by Gray86hatch
Fun looks like a custom piston for the L92

How bad is it to press a new one in. Custom piston vs shelf with new sleeve

Tim
wiesco custom pistons are $110 a piece. sleeves on average are $100 per sleeve installing price (that doesnt count purchasing price of the sleeve.). so $880 for pistons and $1500 plus for sleeves. if you call dimnd, wiesco, keith black, they usually have pistons for most applications.
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Old Sep 13, 2009 | 09:49 PM
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Originally Posted by Gray86hatch
Fun looks like a custom piston for the L92

How bad is it to press a new one in. Custom piston vs shelf with new sleeve

Tim
What bore size are you at now?
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Old Sep 14, 2009 | 09:15 AM
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Originally Posted by novaflash2002
4.100 safley, the problem is that the block is built around the sleeves, so they are not centered. if they were centerd you might get a 4.125 bore out of them. rule of them is minium thickness of .080 for a sleeve
With a 4.100 bore this means we can slap on some LS7 heads on the L92/LS3 blocks right?
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Old Sep 14, 2009 | 06:06 PM
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nope, those are 4.125
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Old Sep 14, 2009 | 07:37 PM
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I have a LS3 block, and the stock bore is 4.065" , and im planning on boring it out to 4.100" and with a 4.100 stroke to make a 434cid.
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Old Sep 14, 2009 | 07:41 PM
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Originally Posted by novaflash2002
nope, those are 4.125
though its not optimal because the chamber will be shrouded slightly. Its still possible to run those heads is it not? If he really wanted to it could work and probably still make excellent power. Correct me if I'm wrong
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Old Sep 14, 2009 | 09:15 PM
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o sorry, i though u said pistons. i belive ls7 heads need atleast a 4.100 bore, so i think they will fit
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Old Sep 14, 2009 | 10:01 PM
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Gm parts catalog says min bore 4.100
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Old Sep 15, 2009 | 04:23 PM
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We have 4.100" bore L92 engines sitting here at the shop with LS7 heads on them!
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Old Sep 15, 2009 | 04:23 PM
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I probably even have the pistons in stock!!
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Old Sep 15, 2009 | 04:40 PM
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Originally Posted by Jason 98 TA
I probably even have the pistons in stock!!
Would you have them for a 4.100" bore & 4.100" stroke
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