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

Stroked iron block

Thread Tools
 
Search this Thread
 
Old Feb 11, 2003 | 10:33 AM
  #1  
robertbartsch's Avatar
Thread Starter
TECH Veteran
 
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Default Stroked iron block

What is the stock size bore on a new GM iron-block six liter Gen III motor?

If you stuff a 4.125 crank in it using a stock-sized bore, how many cubes (inches please)would that make? I assume overboring it 40 or 60 thousands will not give that much more in cubes...

Do I need dished pistons to avoid too much CR if my head chambers are 60CC?

Do rotating assemblies for this setup come in a kit yet?
Reply
Old Feb 11, 2003 | 10:37 AM
  #2  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,355
Likes: 1,787
From: Chicago, IL
Default Re: Stroked iron block

4.000 = stock bore for LQ4
Reply
Old Feb 11, 2003 | 04:19 PM
  #3  
robertbartsch's Avatar
Thread Starter
TECH Veteran
 
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Default Re: Stroked iron block

...can i order the rotating assembly with dished pistons so i can stay about 10.5 CR?

...who sells them besides lunati? I don't think i need a forged crank with a NA motor with no NOS so are there any less costly ones avialable? $6K seems like a lot for a stroker short block...

...someone should market an assembled short-block based on the iron 6-liter with a "cheap" nodular iron stoker crank that yields 400+ inches... surely people would pound down some doors to get this for $3.5K....

hey sponsors: are you listening?
Reply
Old Feb 11, 2003 | 04:45 PM
  #4  
Chicago Crew UnderBoss's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Oct 2002
Posts: 1,851
Likes: 0
From: Elmhurst, IL (Chicago Suburb)
Default Re: Stroked iron block

GENTLEMAN:

I will post the most simplistic forumula for computing CID when i get home tonite that a forum member just turned me onto.

Its so simple a 2nd grader could compute CID with this forumula. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

MTI 427 Roadster
Reply
Old Feb 11, 2003 | 04:59 PM
  #5  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,355
Likes: 1,787
From: Chicago, IL
Default Re: Stroked iron block

Stroker cranks are not cheap, what can ya do.

Even when you look at how much a Lunati 4.000 crank is, it's not terribly more expensive than a SBC or LT1 4340 forged crank offering... Ours are like <$2000 for cost and SBC ones are like $1000.
Reply
Old Feb 12, 2003 | 12:19 AM
  #6  
Neil 6.0's Avatar
TECH Addict
 
Joined: Nov 2001
Posts: 2,205
Likes: 0
From: as far away from Koonerville as humanly possible
Default Re: Stroked iron block

6.0 + 4.125 crank = ~414ci
bored .030 = ~420
bored .060 = ~427

Any LS1 rotating assembly will work.
Reply
Old Feb 12, 2003 | 12:42 AM
  #7  
Texas Terminator's Avatar
11 Second Club
 
Joined: Jul 2002
Posts: 1,426
Likes: 0
From: Beaver Falls, PA
Default Re: Stroked iron block

bore x bore x stroke x # of cylinders divided by a number i can't remember. <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" /> i have it at home. anyone?
Reply
Old Feb 12, 2003 | 12:47 AM
  #8  
finalymodded's Avatar
TECH Apprentice
 
Joined: Jul 2002
Posts: 318
Likes: 0
From: MS.
Default Re: Stroked iron block

it's bore x bore x stroke x #cylinders x pi(.7854)
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Feb 12, 2003 | 08:15 AM
  #9  
Chicago Crew UnderBoss's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Oct 2002
Posts: 1,851
Likes: 0
From: Elmhurst, IL (Chicago Suburb)
Default Re: Stroked iron block

HERE it IS! The World's easiest forumula (and accurate to) for determining CID=

.7854 x 8 x Bore x Bore x Stroke = cubic inch


YOUR WELCOME! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

MTI 427 C5 Roadster
Reply
Old Feb 12, 2003 | 09:05 AM
  #10  
Neil 6.0's Avatar
TECH Addict
 
Joined: Nov 2001
Posts: 2,205
Likes: 0
From: as far away from Koonerville as humanly possible
Default Re: Stroked iron block

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by robertbartsch:
<strong>$6K seems like a lot for a stroker short block...

...someone should market an assembled short-block based on the iron 6-liter with a "cheap" nodular iron stoker crank that yields 400+ inches... surely people would pound down some doors to get this for $3.5K.... </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Maybe in 10-20 years this will be an option, but as for right now, you gotta pay to play. <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />
Reply
Old Oct 17, 2007 | 11:24 AM
  #11  
oz304's Avatar
On The Tree
 
Joined: Oct 2007
Posts: 126
Likes: 0
Default

yeah like if you can buy a quality scatt nodular iron stroker crank for a few hundred bucks,surely theres no scientific evidence that implicates lsx cranks are any more expensive to manufacture .its like for some weird reason lsx engine punters get some sort of exile tax burdeon or companys scheming agendas.
i mean you get some big name enterprises that made their millions years ago,yet refuse to get on with the concept of seamless stategic manufacturing counter saving measures to end up providing
the resellers a better deal!
lets get real here.everyone likes to see no bull affordable stroker kits in various basic,semifinished,fully finished or complete assembled
options with consideration to each persons needs where material
allows.
conversely in oz you can nail a brand new iron block + 4in crank that yields 427 ci for a tad over $1600us + yet these brands are proven to handle 7000+rpm all day! now how does this work when them
kits have been imported directly from the usa beforehand ?yet allow so much margin for the engine builder to
just add ye pistons and rods and away you go,that allows some scope to put food on the table too!
speed costs money some may say,fair enough,but what about fuel efficiency consideration for the enviroment,promote the epa legal
concept with the big ci engine kits,spread the good word+ ye may very well get the epa on your side for a change?
with goverment assisted fundings.

Last edited by oz304; Nov 5, 2007 at 09:59 AM.
Reply
Old Oct 17, 2007 | 01:23 PM
  #12  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

I have this:
Eagle 4.000" Crank
Eagle 6.125" Rods
Mahle 4.000" Pistons

402ci Displacement
Reply
Old Oct 17, 2007 | 04:04 PM
  #13  
Asmodeus's Avatar
Banned
 
Joined: Apr 2006
Posts: 1,875
Likes: 1
From: Naperville, IL
Default

Originally Posted by oz304
why some are scared to promote simple big cube kits of the simple and affordable kind that allows some scope to put food on the table too!

then make more money.

speed = $$$

always has, always will
Reply
Old Oct 18, 2007 | 02:45 AM
  #14  
oz304's Avatar
On The Tree
 
Joined: Oct 2007
Posts: 126
Likes: 0
Default

obviously

but not everytime

Last edited by oz304; Nov 5, 2007 at 10:00 AM.
Reply
Old Oct 18, 2007 | 01:14 PM
  #15  
GMmexican's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Jan 2006
Posts: 1,607
Likes: 0
From: San Jose, CA
Default

good way to bring back an old thread
Reply




All times are GMT -5. The time now is 09:14 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE