mattz06

are ls1 heads ok on a 4.0 bore lq4 6.0 block?

FASTONE

They"ll work fine,the main difference is a 66cc chamber on 241 heads and 72cc on 317 head,the317 has same intake port as ls6 .the 241 head will raise your CR about a half a point.

mattz06

I am aware of the comp difference, just wondered if the combustion chambers diameter on ls1 heads being smaller than 6.0 heads is ok?

use 6.0 gaskets? (6.0 block/ls1 heads)

FASTONE

You"ll have to use a gasket for the 4.0 bore,they work fine.

taqwache

thats what i got.

RELLIM51

Would the 241's make more power on a 6.0 than the stock iron heads? with a decent cam of course.

LS1Maniac

Any time you raise compression you're gonna get more power. It will also be lighter since it's alumninum heads versus iron.

EvilRed98

let's keep this going.....

FASTONE

OK, but whyy?????

jrp

iTrader: (16)

especially since i already answer his question in his other thread.

FASTONE

Hey jrp,I thought it was about time for you to show up!

BLK02WS6

iTrader: (2)

I'm running LS6 heads on a 6.0L block with GM 6.0L headgaskets - it works just fine!

EvilRed98

hey JRP be nice.......I am one of those guys who needs evry last bit of info I can find before I get knee deep into a project.....sorry......I guess my real goal here is to figure out which set of heads to use. I don't want to do all this work, and have the old evil red fall flat on her face......Thanks again for the info, I really do appreciate it

JYD92

I'm new to the site so I've been reading everything I can so I don't ask any questions that have already been answered.
These last posts are right where I'm trying to find answers.
I have an LQ4 6.0L, I'm putting a set of '03 5.3L heads(slightly ported on exhaust side) to bump compression to about 10:1 and putting an LS1 intake on it. Any opinions on what cam to go with?

ZeeTwentyFate

iTrader: (19)

look into the torquer V3... i had it and LOVED it, didnt make much on the power side compared to say MS3, polluter but it ran AMAZING and spanked a few h/c cars with just the cam in my LS1. thats whats going in my 6.0 in the TA with the 241s

A.R. Shale Targa

iTrader: (2)

..NO F#$%ing way..did this thread just come back from a 7yr. break

01ssreda4

iTrader: (96)

Starting your own NEW thread would have been more appropriate

Broke98z28

iTrader: (2)

Also reading this for info on my setup, 241 heads ported and polished with my 372ci lq4 with arp headstuds...gotta find a head gasket to work with my 4.030 bore and done lol

KCS

iTrader: (20)

Use LS3 or LS9 gaskets, they'll work.