Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Solo Performance
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons

Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

Reply
 
Thread Tools
Old 08-10-2011, 11:15 AM   #1
oakaro68
 
oakaro68's Avatar
 
Drives: 2011 Camaro SS/RS M6
Join Date: Aug 2010
Location: San Antonio, TX
Posts: 187
LS3 Connecting Rod research

Hey everyone,

I found this interesting study that compares forged, powdered metal, and cast connecting rod materials. It's a lengthy write-up and full of equations on how they came up with their findings and a summary at the end to wrap things up.

It seems like I keep finding conflicting data on the LS3 Connecting Rods because on GMPP's site they claim they are 'powdered metal' but on the camarohomepage.com they say otherwise.

So I'm confused - Are the LS3 rods forged, or are they just hardened by shot peening?

Is there a difference in the terms 'powdered metal' and 'powdered steel'?

Connecting Rod Material Study:
http://www.forging.org/FIERF/pdf/FatigueBehavior.pdf

Camarohomepage.com write-up - Connecting Rod section: claims the LS3 connecting rods are PF1159M powdered steel, sintered, hot-forged, and shotpeened:
http://www.camarohomepage.com/ls3/

GMPP site engine showcase tech specs:
http://www.gmperformanceparts.com/En...1992&engCat=ls

Can anyone chime in with factual information and if possible, provide technical referrences?
oakaro68 is offline   Reply With Quote
Old 08-10-2011, 07:46 PM   #2
PQ
1st State Chevy supporter
 
PQ's Avatar
 
Drives: Hybrid SS Camaro
Join Date: Apr 2008
Location: Mobile, AL
Posts: 36,717
Send a message via Yahoo to PQ
LS3 rods are not forged. But you can have them and the crank swapped.
__________________
PQ is offline   Reply With Quote
Old 08-10-2011, 09:38 PM   #3
MikeOD

 
Drives: 2010 M6 2SS
Join Date: Mar 2011
Location: Manchester, CT
Posts: 1,153
They are powdered metal...which is a process GM has been using for decades now.
__________________

2010 Camaro SS M6. Heads/Cam/Intake/Headers/Exhaust/Suspension
MikeOD is offline   Reply With Quote
Old 08-10-2011, 10:13 PM   #4
2010 SS RS

 
2010 SS RS's Avatar
 
Drives: 2010 2SS/RS IBM Black Polished
Join Date: Feb 2009
Location: Colorado
Posts: 2,130
Bingo. stock is powder forged. And most that build their motors goes with Steel forged H rods instead of I beam. stock rods can and do have failure even at stock power levels but are within tolerences that warranty expense is less than upgraded rods in all units. In addition the use of rated bolts is also a major component that should be considered
__________________
418 Stroker, 621RWHP 648 lbs TORQUE Built by Laramie GM Auto Center Tuned by Nick at Mac Autosport. EForce SC, 2 3/4pulley,LPE dual fuel pump, JRE Twin fuel rail upgrade, posi clutch kit, RX oilcatch can and breather, Callies Compstar crankshaft and rods, Racing bearings, CP -13.8 race pistons, steel rings, Comp Cams X6 blower cam, Springs, HD timing chain and tensioner, Doug Thorley Tri Y LT headers, 89.7lb injectors, RPM rollbar, DSS1400 shafts, Simpson 5 pt harness, BMR Toe rods and trailing arms, led lights, RPM input and output shafts
2010 SS RS is offline   Reply With Quote
Old 10-08-2011, 05:12 AM   #5
Ratt
Account Suspended
 
Drives: 2ss
Join Date: Sep 2011
Location: Illinois
Posts: 199
LS3 connection rods are powdered metal and the LS9's are forged Titanium.
Ratt is offline   Reply With Quote
Old 10-08-2011, 05:43 AM   #6
Ovenmitt
Account Suspended
 
Drives: 2011 RJT 1SS
Join Date: Apr 2010
Location: Fort Lewis, Washington
Posts: 733
Send a message via AIM to Ovenmitt
LS3 rods are shot peened cracked cap powdered metal (Pink or PM) rods.
Ovenmitt is offline   Reply With Quote
Old 10-08-2011, 07:43 AM   #7
Jamie Mac
NCM-WINR
 
Jamie Mac's Avatar
 
Drives: 2010 SS/RS IOM 2014 2LT Stingray
Join Date: Mar 2009
Location: Pittsburgh
Posts: 2,281
Shot peening does work harden the surface but it is actually a stress relief procedure.
__________________
When Mullets drove Camaro's, they didn't just know their car was fast, they set down their wax applicator and proved their car was fast. -J.M. March, 2012
Jamie Mac is offline   Reply With Quote
Old 10-08-2011, 09:29 AM   #8
SC2150
Account Suspended
 
Drives: 2012 Camaro RS, RX supercharged
Join Date: Dec 2009
Location: Bradenton, FL
Posts: 6,081
Last two posts above me are right on. The stock powdered metal rods are actually quite strong. The weak point being the rod bolts/studs. In the failures I see (We build motors non-stop here) most are a failed rod stud that has streched and allowed the bearing to hammer thin & spin. Then the rod itself breaks quite often and the results are catastrophic. All are forged builds we use forged H-beams for the reduced widage.
SC2150 is offline   Reply With Quote
Old 10-08-2011, 10:18 AM   #9
CC Performance
Account Suspended
 
Drives: 99 Camaro SS, 79 z28, 70 GTX
Join Date: Oct 2009
Location: ST Helens, OR
Posts: 1,777
They are powdered metal
CC Performance is offline   Reply With Quote
Old 10-08-2011, 11:21 AM   #10
Ratt
Account Suspended
 
Drives: 2ss
Join Date: Sep 2011
Location: Illinois
Posts: 199
Quote:
Originally Posted by SC2150 View Post
Last two posts above me are right on. The stock powdered metal rods are actually quite strong. The weak point being the rod bolts/studs. In the failures I see (We build motors non-stop here) most are a failed rod stud that has streched and allowed the bearing to hammer thin & spin. Then the rod itself breaks quite often and the results are catastrophic. All are forged builds we use forged H-beams for the reduced widage.
The bolt or stud being the weak point makes sense, I keep reading where the powdered metal rods are weak and it’s not true.

Do you sell the Titanium forged connecting rods? Do you sell the Titanium intake valves and Sodium filled exhaust valves?
Ratt is offline   Reply With Quote
Old 10-08-2011, 11:31 AM   #11
Rage
TRI-COUNTY CAMARO... FTW!
 
Rage's Avatar
 
Drives: 2010 Camaro 2SS M6 Cyber Grey
Join Date: May 2010
Location: South Florida
Posts: 1,978
Forged Titanium? Holy Sh*t!... they must be costly...... Im looking for a full forged Adamantium bottom end.....
__________________
CAI inc. cold air intake, LG G6x3 cam, Patriot Gold Extreme Dual springs, Titanium retainers and locks, LG SuperPro 1 7/8 Long Tube headers with full 3" exhaust, DynoMax VT mufflers, SLP 4" tips, Moroso catch can, Race Ready electronic exhaust cut outs, Full painted Razzi body kit, Headlight Armor Smoke taillight and marker blackouts, T-Rex aluminum upper and lower grille, Polished aluminum front and rear bowties. Professionally installed and Dyno Tuned by HorsePower Sales, Pompano Beach FL.
Rage is offline   Reply With Quote
Old 10-08-2011, 12:03 PM   #12
AG454
I am not "Fast & Furious"
 
AG454's Avatar
 
Drives: '13 Sonic,'10 Camaro LSX454,'91 Z71
Join Date: Nov 2008
Location: Greeley Colorado
Posts: 595
Quote:
Originally Posted by Rage View Post
Forged Titanium? Holy Sh*t!... they must be costly...... Im looking for a full forged Adamantium bottom end.....
Wolverine,is that you?
__________________
LSX 454 (nuff said)
AG454 is offline   Reply With Quote
Old 10-08-2011, 12:11 PM   #13
Ratt
Account Suspended
 
Drives: 2ss
Join Date: Sep 2011
Location: Illinois
Posts: 199
Remember when kids use to watch cartoons on Saturday morning? Now they post on car forums, too bad they don’t pay their own insurance.
Ratt is offline   Reply With Quote
 
Reply

Tags
bottom end, connecting rods, ls3, rotating assembly

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LS3 stock Intake maniflod, stock Cats, and stock exhaust manifolds,camshaft & air box Turbo99 V8 - Engine, Exhaust, Bolt-Ons, Tuning Equipment 12 09-04-2011 08:17 PM
Katech independently tests FAST LSXR LS3 manifold vs two ported LS3 manifolds Katech Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 9 05-20-2011 10:58 AM
Hot Rod Magazine '79 Camaro Z28 w/ E-Rod Crate LS3 5GSS 5th Gen Camaro SS LS LT General Discussions 5 05-11-2011 12:01 PM
LS3 engine specifications Tran Wiki 3 10-06-2010 10:56 PM
5th Gen Camaro LS3 info from Chevy Hi-Po...READ TAG UR IT Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 295 03-07-2008 10:06 AM


All times are GMT -5. The time now is 06:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.