badtexasZ28

what is the most you can bore an LS1 block?
and what is the biggest stroke you can go?

2001 Pewter WS6

iTrader: (43)

You can bore it up to .010

Max Stroke 4.125

SLED28

iTrader: (7)

I've put some 4.250 stroke motors together...

badtexasZ28

i was thinking of building up a late model 455 for a friends TA, just wondering if it would be possible...

jrp

iTrader: (16)

yes its possible, not ideal though. MTI did it with a 4.155 x 4.250 combo. with the new darton 4.200 sleeves you can go 4.200 x 4.125 and get 457.

badtexasZ28

why is it not ideal?

Steve - Race Eng

iTrader: (1)

There really isn't enough deck height on these blocks to run a 4.25" stroke. The ring pack gets really tight, wrist pin is well into the oil ring and the piston skirt is unexceptably short. This results in a short lived engine.

I don't like to go over 4" stroke. Much longer and you will be taking the engine apart every 15 - 20K miles for a rebuild.

badtexasZ28

very well....sounds like he will be getting a 427 instead
lol

ls1290

iTrader: (20)

When are those going to be ready? I like the idea of a 406 CID stroker( 4.2 x 3.662 ).