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

connecting rod questions

Thread Tools
 
Search this Thread
 
Old Feb 27, 2009 | 05:07 PM
  #1  
utahws6's Avatar
Thread Starter
Staging Lane
iTrader: (11)
 
Joined: Dec 2004
Posts: 55
Likes: 0
Default connecting rod questions

what the difference between a old style sm block rod and an ls1/6 if they have the same dimensions.. (6.125 9.27 pin 2.1 journal)?

also..are aluminum rods on the street a bad idea? (dd)
Reply
Old Feb 27, 2009 | 05:30 PM
  #2  
Gary Z's Avatar
10 Second Club
 
Joined: Nov 2002
Posts: 1,471
Likes: 3
From: Berkeley, California
Default

The big end of SBC rods is not centered under the beam as it is on the newer rods. SBC rods are offset because the big-end thickness is not equal to the offset between cylinder banks. The offset between cylinder banks of the new engines is exactly equal to the thickness of a rod big-end, hence symmetrical rods.
Reply
Old Feb 27, 2009 | 06:24 PM
  #3  
Tom@SpeedInc's Avatar
Banned
iTrader: (5)
 
Joined: Apr 2003
Posts: 1,890
Likes: 0
From: Chicago
Default

Originally Posted by utahws6
what the difference between a old style sm block rod and an ls1/6 if they have the same dimensions.. (6.125 9.27 pin 2.1 journal)?
LS motors use a metric pin .944", performance rods/pistons are .927"
Originally Posted by utahws6
also..are aluminum rods on the street a bad idea? (dd)
Unnecessary really, the work you do for fitting aluminum rods doesn't' worth it.
With a steel rod you can run a tighter quench. Few LS pistons will fit an aluminum rod i've found, need to have the pistons internally milled to fit.
Lot of the higher end Diamond pistons will fit an aluminum rod.
Reply
Old Feb 28, 2009 | 08:00 AM
  #4  
utahws6's Avatar
Thread Starter
Staging Lane
iTrader: (11)
 
Joined: Dec 2004
Posts: 55
Likes: 0
Default

ok the offset makes sense..for aftermarket pistons..i couldnt see why there were ls and and then small block listed seperate when the dimensions looked the same.
Reply




All times are GMT -5. The time now is 07:10 AM.

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 | 2026-06-04 18:13:20


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