Why can't you bore a LSX block?
 

Looking at some pics of a bare block, there seems to be room enough on the sleeves to go at least .010" over. Doesn't make any sense but then, what do I know? :lol:

Simple, just not enough meat in the sleeves.

What is the thickness of the sleeves? Looking at a block without heads it appears there is plenty of sleeve material. Are they thicker on top then the rest of the sleeve. Forgive my ignorance. I'm bored at work today and just feel like posting something. I'm sure you inderstand! :eek2: :lol:

The sleeves are pressed into an aluminum block. Dont forget, you have plenty of meat to see, but you also have to have enough to keep it stable. What was the maximum overbore on the newer blocks? Is it .012? I think the older ones were .007. If you want a bigger bore you have a few options. 6.0 steel block with up to a .040 over(safely), Darton MID to whatever their current max size is, and C5R block(which cost $6K).

Brandon

i'm pretty sure you can bore to a .005 the 98's will only tolerate a slight hone iirc...you can get a darton sleeved block for up to a 434ci (427 typical)...and you can get c5-r which i have no clue how big it can go...typical is 427ci...i think it has a 4.125 bore...where as the 6.0 has a 4.000 bore...i don't think you can bore out the iron 6.0L very much either 402 and 408 stroker's are typical...

Actually, isn't the block cast around the sleeves? I think I read that in technical brochure for Darton's MID sleeve replacement. It was explaining the process but I didn't read the whole thing.

I was just thinking if you wanted to substitute forged slugs for the cast, .010" doesn't seem like a whole lot of material to remove. I mean it doesn't really matter because I'm not looking to do it. I more or less just wanted to get some discussion going after looking at a bare block and thinking to myself, "Hmmm...seems like you should be able to take it out 010." I was thinking that engine builders must have looked at these blocks and thought the same thing!

https://www.z06vette.com/gallery/data/500/4844pdeck.jpg

I think the part you see is a lip that is wider than the rest of the sleave.

Here is a pic of my '98 block from the other direction.

https://i3.photobucket.com/albums/y6...x/IM000202.jpg


Though, I've also tried to ask why '98s could not be honed to .010 when there is a GM service piston available for this purpose....

i think that picture gives you your answer...

The block is now 3.905 btw with one cylinder sleeved. I might try how it likes .010 next time it's open...

Puts it into perspective doesn't it! :lol:

Pekkaz beat me to it :) You need to see it from the bottom side. THe early blocks allowed hones up to .004, later blocks allow up to .010" bore. SAMWS6 and a couple others in the archives have gone over as I did with an early block. So far they haven't had any problems (I check in with them from time to time and ask). My 395 stroker still isnt done, so I cant give you any reliability issues. I am using 3.905 pistons.

One thing for sure, if you dont follow the normal advice, and do as we did, I wouldnt suggest running a power adder.

HTH
David

Thanks for the info David. I didn't know you can you get pistons for the LS engines at .010" over. I've seen the .005" over before. Learn something new everyday. :chug:

Anyway, hope all works out on the 395! Should be a beast!

Here's some info from the LS2 forum that might help answer some questions.
https://ls1tech.com/forums/generation-iv-internal-engine/306577-ls2-block-interior-revealed.html

when you see a sleeve out of the block you can really see how thin it is. with steves tools he can take a sleeve in a single pass.

OK, it all makes sense now especially after looking at the above thread. Hey, that's why I asked the question! :lol: