LS1TECH - Camaro and Firebird Forum Discussion

Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

lq9

Thread Tools
 
Search this Thread
 
Old Feb 10, 2014 | 03:03 PM
Share
  #1  
my406cid's Avatar
my406cid
Thread Starter
Launching!
15 Year Member
Liked
Loved
 
Joined: Mar 2011
Posts: 200
Likes: 0
From: wi
Default lq9
Anyone build a stock stroke lq9/ls3 with a 4.125 bore with ls3 heads for the street? I know the bore will u should the valves but will it be a spinner or torquy? I know cam plays the role but just askin
Reply
0
Old Feb 10, 2014 | 05:12 PM
Share
  #2  
96capricemgr's Avatar
96capricemgr
11 Second Club
iTrader: (1)
 
Joined: Sep 2004
Posts: 11,975
Likes: 15
Default
Really 4.125 BORE in an LQ9 block? Sleeves?
See you are in WI who is doing the machining?
Reply
0
Old Feb 10, 2014 | 05:15 PM
Share
  #3  
Werewolf SS's Avatar
Werewolf SS
On The Tree
iTrader: (3)
 
Joined: Dec 2007
Posts: 141
Likes: 0
Default
It can be done but you have to get special made pistons. Even then it's not recommended to be daily driven like that. 4.125 is just to long a stroke on an lq block. The piston skirt sticks out the bottom of the bore and causes issues.
Reply
0
Old Feb 10, 2014 | 05:33 PM
Share
  #4  
96capricemgr's Avatar
96capricemgr
11 Second Club
iTrader: (1)
 
Joined: Sep 2004
Posts: 11,975
Likes: 15
Default
Reread his post he specifies stock stroke 4.125 bore.
Reply
0
Old Feb 10, 2014 | 05:38 PM
Share
  #5  
Werewolf SS's Avatar
Werewolf SS
On The Tree
iTrader: (3)
 
Joined: Dec 2007
Posts: 141
Likes: 0
Default
My bad saw the second post first. Well first off you can't take an LQ to 4.125 bore. 4.06 is what most say is the furthest before it becomes an issue of integrity and a wall thickness test would be recommended.
Reply
0
Old Feb 11, 2014 | 07:36 PM
Share
  #6  
my406cid's Avatar
my406cid
Thread Starter
Launching!
15 Year Member
Liked
Loved
 
Joined: Mar 2011
Posts: 200
Likes: 0
From: wi
Default
Y can't sleeve or use ls3 block? This is a paper build at the moment.is it doable? I don't know who would build yet but just wondering how she may act and would u need special pistons?
Reply
0
Old Feb 11, 2014 | 07:49 PM
Share
  #7  
garygnu's Avatar
garygnu
TECH Senior Member
 
Joined: Feb 2009
Posts: 5,445
Likes: 4
Default
what the engine characteristics depend some what on what cam you use .I would not bore out a block much past its cast bore ,unless you sonic check it .ether use a bigger bore block ,or use a 4" crank with a .030 over bore .check Texas Speed to see what pistons they sell with that bore ,and see what rod and crank it works with .do a search here or check U-tube .
Reply
0

Trending Topics

Old Feb 11, 2014 | 08:04 PM
Share
  #8  
my406cid's Avatar
my406cid
Thread Starter
Launching!
15 Year Member
Liked
Loved
 
Joined: Mar 2011
Posts: 200
Likes: 0
From: wi
Default
Sorry shouldn't of said a lq9. A re-sleeved ls3 block.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Feb 11, 2014 | 08:15 PM
Share
  #9  
my406cid's Avatar
my406cid
Thread Starter
Launching!
15 Year Member
Liked
Loved
 
Joined: Mar 2011
Posts: 200
Likes: 0
From: wi
Default
I was thinking of a ls3 version of a 377 with a big bore shorter stroke. I think the cubes end up at 388. Fig with a bore and stroke like this it would make a cyl head shine with the valve shrouded less. Alot of heads are flowed at 4.125 bore
Reply
0
Old Mar 31, 2014 | 11:02 AM
Share
  #10  
my406cid's Avatar
my406cid
Thread Starter
Launching!
15 Year Member
Liked
Loved
 
Joined: Mar 2011
Posts: 200
Likes: 0
From: wi
Default
Bump to top
Reply
0
Back to Subforum
Generation III Internal Engine
View Next Unread
LQ9 Rod bolt question




Advanced Search

All times are GMT -5. The time now is 08:38 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE