Thread: how will a sleeve effect my block

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bad news before my 400 block was overbored the shop had to put a sleeve in it the shop guys are good freinds with my uncle so they just did the work should I still try to build this block up and what are the effects of having to put a sleeve in a block they said it turned out great block is now .040 over

I have used several 350 with sleves and never had a problem. I think it has a lot to do with who does them.

Nothing at all wrong with a sleeved block as long as is was done properly. Go for it!

That cylinder may run a tiny bit hotter. If you experience heat related problems with that run cylinder, you may want to run a colder plug in it. It is doubful you will need to do this as sleeves rarely cause problems.

i put sleeve in all the time it is no big deal they work fine .if done rigth

thanks I was a worried it would be weaker another ? is im on a tight budget are the keith black pistons hypertech flat tops worth the price over speed pro flat tops for just a mild street engine

I Like Speed Pro S

Detroit Diesel 71 series engines have been running dry fit liners for over 50 years and have earned themselves a very good reputation for reliability.

The steel in the sleeve is better than the cast iron block. I would use a block with 8 sleeves and not be worried.

Bob

Originally Posted by Bob W

The steel in the sleeve is better than the cast iron block. I would use a block with 8 sleeves and not be worried.

Bob

Bob,I am not try to beat you up.
This will give you a couple of ideas.
If you are using two different types metal the expansion and contraction of the metals are different because of this combined with the 400's siamesed cylinders creating hot spots in a high hp application.
When we ran 400's 10+ years ago we had a few problems with ring seal on a sleeved cylinder more than one time.
With that being said you may be o.k. for low hp applications.
Before any one pipes in here and talks about alu. racing I have not forgotten about them.

the 400 block may not be the best pick to say that sleeves are good they may not be the best to sleeve the walls are close so a thick wall sleeve may get you a trouble with the wall moveing on the sleeved bore if a thin wall sleeve is used and hi HP as far as things not sealing like rings? well if the block is moveing or the sleeve is not honed right or ??? i have sleeved alot of big blocks and every one thinks they make make more power than the sleeve can take? topfuel runs what ??? sleeves but like said every one may not put them in right .i think i do i put some press on them and try to use a thick wall the sleeves i use are iron but is some times better make up of iron then the block is made out of so i would say it will move about the same as the block. i like putting sleeves in i could put them all day. i have had used blocks that made over 1200HP used in off shore boats that were sleeved and i have cut the old sleeves out for bigger bores and resleeved them .if you do not have a good strong block to start with then cutting more iron out of it will not help. but like said you will be ok for mild hp with the 400

I think it would be cool if someone made a wet sleeve block. You'd have to significantly increase the bore spacing to add some framework between the cylinders to tie the deck to the block, though.