Is boring the block out to .060" over and then sleeving it back to .030" over not an option?

 

it's not cost effective for me. lol

 

...Or .040" over for that matter. Then you wouldn't have to worry about the expense of having custom pistons made, filling the block, and "worrying."

 

If the bore is round and thisck enough for a 60 over then a 1/4 fill and deck plugs (redrilled to a smaller passage ) could help block integrity as far as rigidity.

 

the block is already .040 and it needs more...

nothing is cost effective to me. lol it's going to be 800 for pistons and rings to a .045 bore and i have no way of sonic checking a .060 bore. ??

 

No, I meant boring it to .060" over, then putting sleeves in to bring the bore back to .040" so that you could reuse your .040" over pistons. I can hardly imagine that boring and sleeving would cost anywhere near $800.

 

I really doubt a .010" thick sleeve would work.

 

Don't you mean a .020" thick sleeve? And why wouldn't it work?

 

No, I mean .010" thick. If you're talking about sleeving a .060 bore down to .040, then the difference is .020 diametral, or .010 radial. The thickness is .010. You install the sleeve with an interference fit, so the sleeve material itself is in compression while the block is in tension. If you put .010 thick steel in compression, it will buckle.

Mike

 

What's the minimum thickness a sleeve needs to be to keep it from failing?

 

my old pistons are junk. so i need new ones anyway.

 

Tell me why if we are concerned with wall thickness would we install a thin sleeve just to drop down to the lower oversize....??

Think MUCH thinker on the sleeves, as in we are making up for material that should be there

 

Ok...Thats easy then. Bore to .060 over then resleeve it till its back to the original 4.000 bore. You gotta get new pistons anyways. Might as well be a stock piston. Will .030 on each side be enough? Just another option...

 

Sounds like you just answered your own question. I'm just trying to brainstorm ideas that will satisfy the reliable/cost effective criteria. But to further clarify, the secondary objective is to get the bore to a size that a standard off the shelf piston will fit, so as to avoid the cost of having a custom set of pistons made. (.045" bore.)

Nobody has yet to answer what the minimum sleeve thickness must be for it to be "safe."

 

It was a rhetorical question.....

You can get sleeves in whatever size you need...if you want .150 wall thickness with a pre-set bore, then you order the closest thing to that, bore out the cylinder and install the sleeve.