Manley Spring takes a dump w/ less than 19k miles...
08-12-2004, 11:11 AM
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Manley Spring takes a dump w/ less than 19k miles... Cost me a valve, rocker, and a piston so far. Here's the car: Thunder 230 cam (max lift- .575), stock heads, all boltons, etc. Manley single valvesprings (221423) w/ titanium retainers, manley pushrods, stock valves, stock rockers.
Last year I installed the cam and manley valvetrain stuff. Since then, it's seen almost 19k miles. Last weekend the #6 intake valvespring broke. The valve didn't close all the way and slapped the piston. When I bought these springs, I was told that they were good to .600 lift (I think it's even written on the box). There's no excuse for this spring breaking like it did before clocking even 19k miles. Here are some pics of the damage:
Last year I installed the cam and manley valvetrain stuff. Since then, it's seen almost 19k miles. Last weekend the #6 intake valvespring broke. The valve didn't close all the way and slapped the piston. When I bought these springs, I was told that they were good to .600 lift (I think it's even written on the box). There's no excuse for this spring breaking like it did before clocking even 19k miles. Here are some pics of the damage:
08-12-2004, 01:41 PM
#4
I wouldn't be pissed. I never run an aftermarket valvetrain farther than 15K without swapping springs. That may be a little short for people who daily drive their vehicle, but it's good insurance to make sure things like this don't happen.
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
08-12-2004, 02:20 PM
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Originally Posted by Damian
I wouldn't be pissed. I never run an aftermarket valvetrain farther than 15K without swapping springs. That may be a little short for people who daily drive their vehicle, but it's good insurance to make sure things like this don't happen.
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
08-12-2004, 02:24 PM
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Originally Posted by Damian
I wouldn't be pissed. I never run an aftermarket valvetrain farther than 15K without swapping springs. That may be a little short for people who daily drive their vehicle, but it's good insurance to make sure things like this don't happen.
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
IMO, you should not expect anymore than 15-20K out of a set of springs with any semi aggresive cam, especially single springs....
I couldn't agree more.
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08-12-2004, 02:48 PM
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The springs shouldn't be breaking at 19k miles, even with a fairly aggressive cam. Thats rediculous. You dont hear about 918 springs breaking like that. I personally have 26k on mine. My buddy has put 25k on his 918s and a TR cam without any issues also. I know mileage weakens the spring in terms of tension, but it shouldnt break.
08-12-2004, 03:02 PM
#9
I broke a Manley spring running an old Lunati grind (aka non agressive ramp rates) with a 218/221 525/530 lift cam. I had about 24k miles on the car with mostly daily driving on em.
This past fall I broke an Isky while using my TR 224 cam. I've been running 918s since then, but it's only been about 2500 miles. There was definitely signs of valve float when I had to pull a head to remove a snapped rocker arm bolt. There were very small eyebrows on all of my pistons in the intake valve locations. Not enough to worry about, but made me feel lucky that I didn't do any serious damage to the motor.
This past fall I broke an Isky while using my TR 224 cam. I've been running 918s since then, but it's only been about 2500 miles. There was definitely signs of valve float when I had to pull a head to remove a snapped rocker arm bolt. There were very small eyebrows on all of my pistons in the intake valve locations. Not enough to worry about, but made me feel lucky that I didn't do any serious damage to the motor.
08-12-2004, 03:29 PM
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Sure seems to be alot of Manley stuff coming up here recently. Anyways 29k wow that's alot of mileage. Considering the spring should handle .600 you really weren't stressing them much.
08-12-2004, 10:32 PM
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Originally Posted by 94form2000z
Sure seems to be alot of Manley stuff coming up here recently. Anyways 29k wow that's alot of mileage. Considering the spring should handle .600 you really weren't stressing them much.
08-12-2004, 11:02 PM
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Is there such a thing as a performance spring that
has the service life of OEM (like, I don't want the
valve covers off more than once kind of service life)
or is there a "derating" that should be applied, like
use something that can take at least 0.05" more lift
than your cam puts to it? What does it take to get
a daily driver that shifts at 6500RPM (daily) to last
for 5 years and 50,000 miles, say?
Forgetting about other sorts of breakage and wear,
just the valvetrain?
has the service life of OEM (like, I don't want the
valve covers off more than once kind of service life)
or is there a "derating" that should be applied, like
use something that can take at least 0.05" more lift
than your cam puts to it? What does it take to get
a daily driver that shifts at 6500RPM (daily) to last
for 5 years and 50,000 miles, say?
Forgetting about other sorts of breakage and wear,
just the valvetrain?
08-13-2004, 04:32 AM
#13
And I'm in the middle of getting my manley springs installed.
Although on another note, I hear the 918's are good for 0.625" lift and have heard of a large amount of breakages with them and on low mileage engines with cams under 0.580" lift.
I think these aftermarket springs do part of there job, with larger camshafts they prevent valve float and binding although there is no guarantee they won't break on you.
Isky's, Manley, Comp, etc all have there breakage problems.
Although on another note, I hear the 918's are good for 0.625" lift and have heard of a large amount of breakages with them and on low mileage engines with cams under 0.580" lift.
I think these aftermarket springs do part of there job, with larger camshafts they prevent valve float and binding although there is no guarantee they won't break on you.
Isky's, Manley, Comp, etc all have there breakage problems.
08-13-2004, 06:05 AM
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Originally Posted by MyLS1Hauls
The springs shouldn't be breaking at 19k miles, even with a fairly aggressive cam. Thats rediculous. You dont hear about 918 springs breaking like that. I personally have 26k on mine. My buddy has put 25k on his 918s and a TR cam without any issues also. I know mileage weakens the spring in terms of tension, but it shouldnt break.
08-13-2004, 06:09 AM
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Originally Posted by jimmyblue
Is there such a thing as a performance spring that
has the service life of OEM (like, I don't want the
valve covers off more than once kind of service life)
or is there a "derating" that should be applied, like
use something that can take at least 0.05" more lift
than your cam puts to it? What does it take to get
a daily driver that shifts at 6500RPM (daily) to last
for 5 years and 50,000 miles, say?
Forgetting about other sorts of breakage and wear,
just the valvetrain?
has the service life of OEM (like, I don't want the
valve covers off more than once kind of service life)
or is there a "derating" that should be applied, like
use something that can take at least 0.05" more lift
than your cam puts to it? What does it take to get
a daily driver that shifts at 6500RPM (daily) to last
for 5 years and 50,000 miles, say?
Forgetting about other sorts of breakage and wear,
just the valvetrain?
08-13-2004, 09:13 AM
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19k is alot on springs with a cam. I dont think I will go more than 10k on my springs with my cam. Sorry to hear but 19k is something id be proud of getting out of single springs on a cam.
08-13-2004, 09:24 AM
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Originally Posted by GTS346
And I'm in the middle of getting my manley springs installed.
Although on another note, I hear the 918's are good for 0.625" lift and have heard of a large amount of breakages with them and on low mileage engines with cams under 0.580" lift.
I think these aftermarket springs do part of there job, with larger camshafts they prevent valve float and binding although there is no guarantee they won't break on you.
Isky's, Manley, Comp, etc all have there breakage problems.
Although on another note, I hear the 918's are good for 0.625" lift and have heard of a large amount of breakages with them and on low mileage engines with cams under 0.580" lift.
I think these aftermarket springs do part of there job, with larger camshafts they prevent valve float and binding although there is no guarantee they won't break on you.
Isky's, Manley, Comp, etc all have there breakage problems.
As for my springs pressures, I will be testing them in a few months and will let everyone know what they were.
08-13-2004, 09:40 AM
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I just until recently had manley's on my LS6 head with no issues. The cam I was using was a Comp 228/230 .571/573 XE. I've abused those springs pretty hard with no issues and pulled 425/400 with no float issues. I have since switched to AS stage 2.5 heads and run the crane duals. I personaly think that if u broke a sping after say 2K then that would be bad. I think at the level of performance these engines offer matched with the very aggressive cams we use springs should be seasonal maintenance. If u want a 100k spring then look at the factory stuff-I believe the new LS2 motor has even more lift than the Z06 cam. I know it sucks my friend but it could of been alot worse.
08-13-2004, 04:17 PM
#19
I know where I've been, do a search on here buddy and you'll see there are more threads with breakages with comps then manleys. But that's probably due to comps being in 90% of the cars with cams.
But by the sounds of it your trying to make it out as if comps are unbreakable, indestructable?
But by the sounds of it your trying to make it out as if comps are unbreakable, indestructable?
Originally Posted by MyLS1Hauls
I dont know where you've been, but there were only a few isolated incidences with old 918s breaking, but I've yet to hear of any blue stripes failing. I cant help but think its a harmonics issue fatiguing the springs and causing them to fail. I'm not a spokesperson for Comp, but why people are using other springs that are not working is beyond me. Just take a look, the Manleys do not last as long.
As for my springs pressures, I will be testing them in a few months and will let everyone know what they were.
As for my springs pressures, I will be testing them in a few months and will let everyone know what they were.
