Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Vararam
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


Reply
 
Thread Tools
Old 01-30-2011, 11:56 PM   #1
SStothebone
 
Drives: 2011 Camaro 2SS/RS
Join Date: Dec 2010
Location: Florida
Posts: 45
Valve Springs

Whats better for a procharged, cammed LS3? Dual spring valve spring or the traditional single spring?
SStothebone is offline   Reply With Quote
Old 01-31-2011, 02:23 AM   #2
Kilo-9
Dog Is My Copilot
 
Kilo-9's Avatar
 
Drives: 2011 2SS/RS LS3
Join Date: Jun 2009
Location: Pittsburgh, PA
Posts: 1,394
I would say it depends upon the specs of the cam.
__________________
Kilo-9 is offline   Reply With Quote
Old 01-31-2011, 02:29 AM   #3
SUX2BU
Quit being a pu$$y
 
SUX2BU's Avatar
 
Drives: FAST
Join Date: Jan 2011
Location: Sachse TX (DFW)
Posts: 5,824
I would always do doubles for the safety.
SUX2BU is offline   Reply With Quote
Old 01-31-2011, 03:55 AM   #4
Wilburbeest
Think With Your Dipstick!
 
Wilburbeest's Avatar
 
Drives: 1997 Camaro Z28
Join Date: Jul 2010
Location: Spokane, WA
Posts: 185
Quote:
Originally Posted by SUX2BU View Post
I would always do doubles for the safety.
^Exactly what I was gonna say.^

They may be more expensive, but in the event that a spring breaks, the extra investment for doubles could save you a lot of cash in the long run. If one never breaks on you, you still get the peace of mind. Seems like a win either way.
__________________
- Willy

1997 Camaro Z28 (LT1/T56): K&N CAI | Kooks 1 3/4" LTs | 3" Custom Duals | UMI LCAs w/ relocation brackets | UMI adj. panhard bar | UMI adj. torque arm | Koni SA shocks | Strano Springs | Ram Powergrip clutch | Pro 5.0 shifter | skip shift eliminator kit | WS6 Store rotors | Hawk HPS pads
Wilburbeest is offline   Reply With Quote
Old 01-31-2011, 06:05 AM   #5
danhr
BAMF SS
 
danhr's Avatar
 
Drives: 2010 Camaro SS/RS
Join Date: Mar 2010
Location: Ford City, PA
Posts: 2,048
Send a message via AIM to danhr
x3

double springs... i would never put a single spring on my vehicle.

Just this one scenario should be enough to sell you on double valve springs.....:

A single valve spring breaks on a motor, you drop a valve, and you have to replace at minimum the cylinder heads, pistons, re-hone/bore the cylinder sleeve, rebalance the bottom end again, we are talking well into the thousands of dollars of repairs.. AT MINIMUM

A double valve spring breaks on a motor. The other valve spring still holds the valve up. Not only do you not blow your motor up, but it will still run! Granted not like it should and I wouldn't suggest revving it to 7k rpms, but you can actually drive it home very carefully and not damage the motor.
__________________
Bragging about a car that you paid someone to pick the parts and install them for you, is like paying someone to bang your wife, and then bragging about the kid.
"I'm sorry officer, no, I do not know why you pulled me over."
danhr is offline   Reply With Quote
Old 02-01-2011, 01:32 PM   #6
andredmg
Big Nasty
 
andredmg's Avatar
 
Drives: Chevys lots of em
Join Date: Jun 2010
Location: Albuquerque NM
Posts: 930
Quote:
Originally Posted by danhr View Post
x3

double springs... i would never put a single spring on my vehicle.

Just this one scenario should be enough to sell you on double valve springs.....:

A single valve spring breaks on a motor, you drop a valve, and you have to replace at minimum the cylinder heads, pistons, re-hone/bore the cylinder sleeve, rebalance the bottom end again, we are talking well into the thousands of dollars of repairs.. AT MINIMUM

A double valve spring breaks on a motor. The other valve spring still holds the valve up. Not only do you not blow your motor up, but it will still run! Granted not like it should and I wouldn't suggest revving it to 7k rpms, but you can actually drive it home very carefully and not damage the motor.
Dead on, if that doesnt sell you on doubles I dont know what will!!!
andredmg is offline   Reply With Quote
Old 02-01-2011, 02:07 PM   #7
Anthony @ LG Motorsports



 
Anthony @ LG Motorsports's Avatar
 
Drives: 1994 1LE / 2006 Z51 Corvette
Join Date: Jul 2009
Location: Plano, TX
Posts: 2,792
Quote:
Originally Posted by Kilo-9 View Post
I would say it depends upon the specs of the cam.
Exactly....

Sure double springs offer you a bit more safety but to much spring can also be hard on the engine as well.

If the cam does not need a valve spring of that size and pressure then you can rob HP by using it to open and close the spring, increase oil and water temps, increase cam wear, valve seat wear...a number of different things.

You should almost use the lightest spring you can get away with, within reason.

Putting a 400 psi dual valve spring on a stock car is not going to help anything or make it last 10x longer, if anything it will put more wear on everything else.

At the same point an time...when you do go to a larger cam, then it is advantagous to go to a stronger and dual spring setup. Which is why we use the 921 Comp duals with all of our cam kits.
Anthony @ LG Motorsports is offline   Reply With Quote
Old 07-07-2011, 09:06 AM   #8
Angrybird 12
Retired, Cancer Survivor
 
Angrybird 12's Avatar
 
Drives: 12 CAMARO, 15 Impala, 07 Colorado
Join Date: Dec 2007
Location: East Tennessee
Posts: 20,968
I've been driving since 1969 and have never had a valve spring break. I have bent pushrods before but never anything to do with valve springs. I don't know it going to a double spring is worth it on a street car unless you have other mods on the engine or intend to run it very hard up to or over redline.
__________________
Cancer's a bitch! Enjoy life while you can! LIVE, LOVE, DRIVE...CAMARO!

The Bird is the word!
Angrybird 12 is offline   Reply With Quote
Old 07-07-2011, 09:14 AM   #9
SUX2BU
Quit being a pu$$y
 
SUX2BU's Avatar
 
Drives: FAST
Join Date: Jan 2011
Location: Sachse TX (DFW)
Posts: 5,824
Quote:
Originally Posted by Skyman 08 View Post
I've been driving since 1969 and have never had a valve spring break. I have bent pushrods before but never anything to do with valve springs. I don't know it going to a double spring is worth it on a street car unless you have other mods on the engine or intend to run it very hard up to or over redline.
I've been driving and working on LSx motors for about 12 years. I've seen about 10 different cars break valve springs. 5 of those had single springs and 3 of those 5 needed new motors after they broke, the other two needed the valve replaced. The 5 double springs, only one needed a new valve.

These were all aftermarket springs and cams.
SUX2BU is offline   Reply With Quote
Old 07-16-2011, 11:06 AM   #10
calbert1999
Camaro SS Lover
 
calbert1999's Avatar
 
Drives: 2010 Camaro 2SS/RS Black IOM
Join Date: Jun 2010
Location: Toronto, Ontario (Canada)
Posts: 2,863
Quote:
Originally Posted by danhr View Post
x3

double springs... i would never put a single spring on my vehicle.

Just this one scenario should be enough to sell you on double valve springs.....:

A single valve spring breaks on a motor, you drop a valve, and you have to replace at minimum the cylinder heads, pistons, re-hone/bore the cylinder sleeve, rebalance the bottom end again, we are talking well into the thousands of dollars of repairs.. AT MINIMUM

A double valve spring breaks on a motor. The other valve spring still holds the valve up. Not only do you not blow your motor up, but it will still run! Granted not like it should and I wouldn't suggest revving it to 7k rpms, but you can actually drive it home very carefully and not damage the motor.
Quote:
Originally Posted by SUX2BU View Post
I've been driving and working on LSx motors for about 12 years. I've seen about 10 different cars break valve springs. 5 of those had single springs and 3 of those 5 needed new motors after they broke, the other two needed the valve replaced. The 5 double springs, only one needed a new valve.

These were all aftermarket springs and cams.
Any idea why a valve would bend after replaceing the entire head accessories with top notch gear (springs, rockers, et al)? No broken "dual" springs or anything in the heads, just a bent valve (so far)?
__________________
2010 Camaro SS, P1SC SuperCharged Livernois LSX429ci., 1 7/8" LT Headers, full 3" MBRP exhaust, SPI built/tuned, a total
calbert1999 is offline   Reply With Quote
Old 07-16-2011, 11:13 AM   #11
SUX2BU
Quit being a pu$$y
 
SUX2BU's Avatar
 
Drives: FAST
Join Date: Jan 2011
Location: Sachse TX (DFW)
Posts: 5,824
Quote:
Originally Posted by calbert1999 View Post
Any idea why a valve would bend after replaceing the entire head accessories with top notch gear (springs, rockers, et al)? No broken "dual" springs or anything in the heads, just a bent valve (so far)?
Valve float.

This could be cause by weak springs or springs where installed height was not checked and shimmed accordingly.
SUX2BU is offline   Reply With Quote
Old 07-16-2011, 11:39 AM   #12
calbert1999
Camaro SS Lover
 
calbert1999's Avatar
 
Drives: 2010 Camaro 2SS/RS Black IOM
Join Date: Jun 2010
Location: Toronto, Ontario (Canada)
Posts: 2,863
Quote:
Originally Posted by SUX2BU View Post
Valve float.

This could be cause by weak springs or springs where installed height was not checked and shimmed accordingly.
Thanks, for response. So, if spring defective and weakened over time, the valve could have been pushed further down than it should and came in contact with the piston and got smacked hard enough to bend it and or cause other damage to the walls, piston, head, etc...? Or if I"m lucky not other damage?
Also, could something like this be caused if clutch suddenly busted at medium RPM's around 3k, which caused the engine to overreve and exceed some forces for a few seconds?
__________________
2010 Camaro SS, P1SC SuperCharged Livernois LSX429ci., 1 7/8" LT Headers, full 3" MBRP exhaust, SPI built/tuned, a total
calbert1999 is offline   Reply With Quote
Old 07-16-2011, 11:56 AM   #13
CC Performance
Account Suspended
 
Drives: 99 Camaro SS, 79 z28, 70 GTX
Join Date: Oct 2009
Location: ST Helens, OR
Posts: 1,760
100% depedant on the cam.. I run close to .700 lift and a beehive..LOL 247/263 cam
spring MFG comes into play as well

At the same time I have a 4.8 liter LS engine that we put a 224/231 cam in and are going to run a dual spring.. probably a PAC 1521 in it due to the lobe choice on the cam.



mechanical over rev does happen.... miss a gear ? yes you can force contact

Last edited by CC Performance; 07-16-2011 at 12:07 PM.
CC Performance is offline   Reply With Quote
Old 07-16-2011, 12:32 PM   #14
calbert1999
Camaro SS Lover
 
calbert1999's Avatar
 
Drives: 2010 Camaro 2SS/RS Black IOM
Join Date: Jun 2010
Location: Toronto, Ontario (Canada)
Posts: 2,863
Quote:
Originally Posted by CC Performance View Post
100% depedant on the cam.. I run close to .700 lift and a beehive..LOL 247/263 cam
spring MFG comes into play as well

At the same time I have a 4.8 liter LS engine that we put a 224/231 cam in and are going to run a dual spring.. probably a PAC 1521 in it due to the lobe choice on the cam.



mechanical over rev does happen.... miss a gear ? yes you can force contact
Thinking this was caused from all the issues with the shifter / clutch not going into gear, grinding, getting stuck, pedal stuck to floor, etc....
__________________
2010 Camaro SS, P1SC SuperCharged Livernois LSX429ci., 1 7/8" LT Headers, full 3" MBRP exhaust, SPI built/tuned, a total
calbert1999 is offline   Reply With Quote
 
Reply

Tags
valve spring

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
DIY: LS3 Camshaft Install (a lot of pictures, may take a moment to load) robertway Camaro DIY & HOW-TO instructions & discussions 272 07-08-2016 10:33 PM
Acronyms? KEEP RT Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 20 03-11-2011 08:57 PM
FI & Valve Springs thekid96 Forced Induction - V8 4 06-08-2010 02:02 PM


All times are GMT -5. The time now is 07:03 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.