firehawk68mcleod

iTrader: (2)

OK i have a ls2 and i was just going to do a clean up and just hown the sleeves 4.005. But im wondering whats a safe bore i can do.. Is 4.030 over safe on the sleeves? also consider the fact that im putting a d1 3.4 pulley procharger on it. Let me know thanks

firehawk68mcleod

iTrader: (2)

any ideas guys

litle88

iTrader: (20)

Uh dont quote me but 4.030 is no good, thats a Lq4-9 block territory, I believe the max is 4.005

LT1Formula007

iTrader: (66)

I'm pretty sure it is 4.010" bore to be safe... 404 cid with a 4.00" Stroke Crank!
I have a 403 cid engine and it's currently set up at 4.005" bore and 4.000" stroke!
I have seen 404 strokers, so I assume 4.010" is safe! I also have seen LS2 413 strokers, But I think they just run a longer stroke... Maybe a 4.010 or ??
But to answer the question, I'm pretty sure it is 4.010" bore max, to be safe!
Don't know if it could go any further safely.
Maybe an engine builder will chime in soon.

James

firehawk68mcleod

iTrader: (2)

yeah i hope so.. lol thanks for ur imput.. i thought 4.010 is a safe bore but i could probably get away with 4.005 and just hown that much out and save some money lol

SirNemesis

I've just taken my LS2 block out to 4.030", still plenty of sleeve left. I haven't fired it up yet, but when I do it'll also be getting 15psi.

firehawk68mcleod

iTrader: (2)

What car you running ausi? a manaro? I think im just going to run 4.005 .. save some money and just hown it. verses a bore and hown

RAACCR

Most of the guys on the internet, who have never done it, tend to perpetuate the myth that .030" is too much.

However, there are plenty of .030" over LS2's reliably making good power.

Your call...believe whoever you want to.

SirNemesis

I've got a Holden WHII Statesman, which is kinda a long wheelbase luxury Monaro.

SOMbitch

iTrader: (8)

Since you are gonna run boost I would just do the minimum cleanup which should be no more than 4.010

firehawk68mcleod

iTrader: (2)

I wish i was living in holdon county... Im a huge pontiac fan and now there gone.. big disaapointment... and i love the manaros and holdons line up... Any four door, rear wheel sleeper.. is sweet in my book

slowride

iTrader: (3)

GM had a .020" oversize piston as max. Some have gone .030" without problems, but I would only do it NA. Had a friend making 800+ on a .015" block with custom pistons and a 88mm turbo in a drag car.