combs_425

iTrader: (3)

can i make a ls1 into a 402? i know i can only hone it over .005

Rare96LT1Formula

iTrader: (32)

AFAIK, no.

I believe you'll need a 6.0L block to achieve those cubes. Someone please advise if I'm mistaken.

BigBirdLS1

I don't think you can IIRC the biggest you can make a 346ci LS1 block is 396ci. I am no expert but I'm almost positive you would have zero cylinder wall left at 402.

smokeshow72

If you sleeve the block you should be able to take it out to 454 from what I remember; at least 427.

Without sleeving the block I think 383 is safe but much bigger than that your rod/stroke ratio gets pretty sketchy and you can't overbore the stock cylinders more than .010 from my understanding.

C

3.8redbird

iTrader: (3)

3.91 bore with 4.125 stroke is the biggest I have seen making a 396.

combs_425

iTrader: (3)

I just didnt know if I could hone it and then stroke it to get me to a 402. IDK why but I have my heart set on a 402 for my next build.

zracer323

iTrader: (12)

A 402 will require a 6.0 block (LQ4/9 or LS2) without resleeving the LS1 block.

combs_425

iTrader: (3)

so it can be done if u resleeve it?

3.8redbird

iTrader: (3)

If you are spending the money to resleeve go 4.125 or bigger bore. 427 FTW

combs_425

iTrader: (3)

how much would resleeving cost?

ROCNDAV

iTrader: (100)

https://ls1tech.com/forums/1250898-post10.html



LS1 blocks from 1997 and 1998 cannot be bored, but can be honed up to .0040".

The liners were redesigned for 1999+ blocks (including LS6) and can be bored up to .010"

All years of blocks are suitable for re-sleeving for bigger bore projects.

Lunati does make a 4.25 stroke crank.

Blk98Vert

iTrader: (2)

Surprised not many people know that you can make one a 440.

82cetuner

iTrader: (9)

I would resleeve will cost you about the same as a block probably depending on whre you got it.

and if you resleve you might as well go 427 like the others said

smokeshow72

Very good block info in this thread:

https://ls1tech.com/forums/generatio...ved-block.html

C

bww3588

iTrader: (49)

Last time I had quotes for re sleeveing and square decking was 200 a hole.

To the op, I would start with a virgin ls2 block to get 402, not have to sleeve it and it's still aluminum.

Most people go max of 3.905 bore on 99 up blocks because that is a shelf piston. A 3.908 piston is more difficult to find.

smokeshow72

Just something cool about a matching-numbers 427 or 454 in a car that wasn't offered over 346; you don't have to worry about front dress, or knock sensors, or anything not fitting...

Daniel0026

4.002 bore (6.0L block honed) and 4.000 Stroke= 402 ci. Thats exactly what I built.

combs_425

iTrader: (3)

well i am going to pick up a 00 WS6 with a blown motor. it already has a turbo kit. i just need to build a motor. i really want a 402 but it is probably cheaper to just go with a 383.

BOBS99SS

iTrader: (2)

i agree , i called around awhile ago and a resleeve is not cheap, imo buying a block would be a way better option

bww3588

iTrader: (49)

^^^do you agree or not? Lol. He is saying a block costs the same as a re sleeve...