If the LS motors and LT's both share the same bore spacing, and LS's are regularly sleeved to 4.125 bore, why not do the same to an LT1? With that bore you could get either 372, 400, or 414 using stock, 3.75, or 3.875 crank I understand for a typical street build it wouldn't be cost effective, but with a single plane and good set of ported aftermarket heads it could make some killer power and torque at lower rpm vs a typical 383 build, am I right?

Assuming it is done correctly by a reputable shop what would be the downsides to this, other than cost?

Hmmmmmmmm!

Any engine set up for a single plane intake and larger aftermarket heads is going to make more power up top than a streetable engine. Sleeving can be done, but it compromises the structural integrity of the block, and you take a change of cutting into a water jacket when machining. It would be cheaper to convert to a larger Gen 1 SBC. And I think the LS1 owners started resleeving before the larger Gen 3 and 4 engines came out.

The LT1 block can be sleeved, like any SBC engine. There's a member here who built a sleeved 427 (4.00 stroke x 4.120 bore). Whether its a good idea is open to debate.

The LSx engines leave the factory with iron sleeves in the aluminum block, and there is very little surplus material in the original sleeves, so new sleeves are required for any appreciable overbore.

You can sleve an LTx block for more ci... its a cost thing. Not many people do it because its a big expense to do (and do it right) with an LT/SBC block compared to an LS block. Since the LS came from the factory sleved its not as big of a deal so to speak. It was made for sleves. The LT/SBC block from teh factory was not so its more of a critical operation with block tolerances.

But to answer the question... you can. But dollar for dollar you would be better off going other routes.

So would say a 414 (4" stroke x 4.06 bore) LS3/L92 swap or 414 (3.875 stroke x 4.125 bore) single plane LT1 into a 95 TA be a cheaper build?

you won't get a 4.125 bore out of a LT1 block.......you will waste alot of money and have a 200 pound worthless pc. of metal.....

Your about 7 years behind on thinking this will work.......a 383 will make more power than you can handle, whats wrong with that?

Also you realize the cost of some of these one of builds you describe?

Well its already been established that it can be sleeved to 4.125 bore like any other SBC if done correctly so it CAN have that bore, I was just wondering, hypothetically, what would be the downsides OTHER than cost.

BTW, approximately how much would a typical resleeving of an LT1 block cost vs an LSx block?

Just wondering.

Good question. I know little about it except that it is expenive - on the order of ~$150/sleeve plus expensive machine work. Sounds like a $2,500 job to do 8 (just a WAG). Most useful to repair a rare or expensive block, from what little I know. Max bore is still relatively limited. Looking at Darton's site (they are the main manufacturer of these things) it looks like ~4.100" would be a max bore with adequate wall thickness.

Rich

PS, FYI: http://speedtalk.com/forum/viewtopic...ghlight=sleeve

Yeah, probably wouldn't be worth it. Just wondering though. I figured if it was a <$1500 job it might be worth it, but if its around the amount you're stating, not worth it. Seems like an LS swap would probably be the best choice if wanting bigger than 396ci.