You guys ever heard of a LS1 being bored/stroked to a 440?

 

Thats a helluva bore on a "non-boreable" block...storke max i believe is like a 382.xx or something. LS1s (correct me if im wrong) really are not ment to be punched much at all if any....just my $.02 tho

 

This is not correct. You can buy replacement bore sleeves for larger displacement (bore) combinations. You can get atleast a 4.125" bore sleeve that I know of. There are probably larger ones.

Others will chime in.

Ben T.

 

So a 440 is possible you think?

 

No, I think about 427 is all you can get out of a stock LS1/6 block. I would go with a 382 - 402 cu in stroker kit to be on the safe side.

 

check with some of the sponsors, like victory racing.

 

my bad

 

biggest I know of personally is 430 on an LSx aluminum block. but getting it sleeved big enough could do it, but I don't know how reliable it would be.

 

For the time being, the biggest LSx based motor you could possibally build is a 471ci. This is using Dartons new 4.200 max bore MID sleeves and a 4.250 stroke Callies crank. I'm currently building a 454 cubic inch stroker using a 4.150 bore LS2 dry sleeve block and a Lunati 4.185 crank. The thing you have to watch for is piston height. When you start getting into the longer strokes, you have to move the pin in the piston. Eventually you start to crowd the rings to a point where they can't effectivally do there job. A 440ci would be easy. Off the top of my head, a 4.150 bore LS2 dry block with a eagle 4.100 crank equals 445ci. You can have that combo built for $6k through the right sponsor.

 

Why cant a LT1 go past 396?

 

It can. A sixty over LT1 with a stroker crank (3.875") is right over 400 cubic inches. The thing is you start running into reliability issues going much over a 396. You see, a 396ci LT1 is close to the same as a 383 stroker. You have the same overbore on the stock cylinder arrangement (no sleeves like the LS1) and simply an aftermarket crankshaft. You can build a 396 for the same that you can build a 383 for pretty much.

There have been bigger LT1s but you reach a point where it's not worth comparing costs/benefits especially when you factor in reliability.

For what it's worth, if you bore your stock LT1 .060" over and add a 4" stroke, then you're at 414 cubes.

Ben T.

 

Although I have to wonder at the cost of that beast.

 

actually a 396 can be quite expensive, if you have a block that has to be decked enough you hit the water jacket you screwed, anything over the 3.785" stroke for a 396 is going to cause problems. now you might be able to bore a bit more for a few extra cubes but if you're really wanting huge cube motors that have some reliability I'd just order one from one the the sponsors here. I am looking to do a 396 at some point, but I'm probably just going to order a shortblock.