LS1TECH - Camaro and Firebird Forum Discussion

Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

ls3 valvespring specs

Thread Tools
 
Search this Thread
 
Old Sep 23, 2009 | 01:40 PM
Share
  #1  
Greg Fell's Avatar
Greg Fell
Thread Starter
TECH Fanatic
20 Year Member
iTrader: (9)
 
Joined: Feb 2002
Posts: 1,126
Likes: 0
From: Morton IL
Default ls3 valvespring specs
anyone have them handy? how much lift, lbs on seat, open, coil bind etc.
Reply
0
Old Sep 23, 2009 | 08:14 PM
Share
  #2  
Robin L's Avatar
Robin L
LS1Tech Sponsor
 
Joined: Feb 2006
Posts: 1,170
Likes: 1
From: Rockfield Kentucky
Default
They are the same as an LS6 and the LS2.

IIRC they are good to .570 lift

I would need to look up the pressure.

Robin
Reply
0
Old Sep 23, 2009 | 08:40 PM
Share
  #3  
Greg Fell's Avatar
Greg Fell
Thread Starter
TECH Fanatic
20 Year Member
iTrader: (9)
 
Joined: Feb 2002
Posts: 1,126
Likes: 0
From: Morton IL
Default
Thats enough for me Robin, thanks. I know exactly which springs they are now.

It looks like the 918's from comp are no longer rated at .650. Whats the deal there? What other options do you guys know of?
Reply
0
Old Sep 23, 2009 | 08:43 PM
Share
  #4  
SweetS10V8's Avatar
SweetS10V8
12 Second Club
iTrader: (4)
 
Joined: Jun 2004
Posts: 2,580
Likes: 3
From: Michigan
Default
There rated to .625", Im running them at .621" lift right now and had to shim every single one of them still to get them where I wanted them.
Reply
0
Old Sep 23, 2009 | 08:52 PM
Share
  #5  
Greg Fell's Avatar
Greg Fell
Thread Starter
TECH Fanatic
20 Year Member
iTrader: (9)
 
Joined: Feb 2002
Posts: 1,126
Likes: 0
From: Morton IL
Default
Originally Posted by SweetS10V8
There rated to .625", Im running them at .621" lift right now and had to shim every single one of them still to get them where I wanted them.
Really? Is this a different part number than the ls6/2? FYI I'm wondering for an 2010 camaro ls3.

i'm 99% sure the ls2/6 springs weren't good to that much lift...am I dreaming?
Reply
0
Old Sep 24, 2009 | 11:00 AM
Share
  #6  
Greg Fell's Avatar
Greg Fell
Thread Starter
TECH Fanatic
20 Year Member
iTrader: (9)
 
Joined: Feb 2002
Posts: 1,126
Likes: 0
From: Morton IL
Default
ttt anyone confirm for sure? tia
Reply
0
Old Sep 24, 2009 | 11:11 AM
Share
  #7  
69LT1Bird's Avatar
69LT1Bird
11 Second Club
iTrader: (1)
 
Joined: Sep 2007
Posts: 2,310
Likes: 6
From: Lapeer, MI
Default
From the GMPP catalog

12586484
Valve Springs (not shown)
• Beehive style springs • Standard LS6/LS3 springs
• Use cap P/N 10166344 • 1.250" @ 295 lbs. pressure
• 1.800" installed height • Max lift .570"
@ 90 lbs. pressure
Reply
0

Trending Topics

Old Sep 24, 2009 | 11:17 AM
Share
  #8  
Petraszewsky's Avatar
Petraszewsky
TECH Resident
15 Year Member
iTrader: (28)
 
Joined: Oct 2008
Posts: 895
Likes: 1
From: USA
Default
I believe SweetV8S10 was referring to the Comp 918s
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 Sep 25, 2009 | 06:42 PM
Share
  #9  
Spectre86's Avatar
Spectre86
TECH Fanatic
15 Year Member
Liked
Loved
Community Favorite
iTrader: (42)
 
Joined: Sep 2008
Posts: 1,166
Likes: 39
From: Oregon
Default
Originally Posted by Greg Fell
Thats enough for me Robin, thanks. I know exactly which springs they are now.

It looks like the 918's from comp are no longer rated at .650. Whats the deal there? What other options do you guys know of?
I think the 918s are rated at .600 and the 921s are rated at .650
Reply
0
Old Sep 26, 2009 | 07:33 AM
Share
  #10  
SweetS10V8's Avatar
SweetS10V8
12 Second Club
iTrader: (4)
 
Joined: Jun 2004
Posts: 2,580
Likes: 3
From: Michigan
Default
Originally Posted by Petraszewsky
I believe SweetV8S10 was referring to the Comp 918s
I was..
Reply
0
Old Nov 28, 2009 | 10:06 AM
Share
  #11  
SS Enforcer's Avatar
SS Enforcer
11 Second Club
 
Joined: May 2007
Posts: 226
Likes: 1
From: Sydney
Default
So a custom hotcam grind with 218 550 550 112 would slip into a ls3 without a springchange ?

I don't care about skimping out on springs but want a light valvetrainand not bash the hollow valves around with heavy duty double springs
Reply
0
Old Nov 28, 2009 | 11:21 AM
Share
  #12  
69LT1Bird's Avatar
69LT1Bird
11 Second Club
iTrader: (1)
 
Joined: Sep 2007
Posts: 2,310
Likes: 6
From: Lapeer, MI
Default
LS3 Valve spring specs.

89 lbs closed valve
294 lbs open valve

1.800 installed height
Reply
0
Tags
Back to Subforum
Generation IV Internal Engine
View Next Unread
Which cam for LS2/L92 heads




Advanced Search

All times are GMT -5. The time now is 04:14 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 | 2026-06-04 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