Biggest cam for LS6 springs
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
Depends what year, the latest 02+ are rated at .580 and can be stiffened more by shimming.
The way to determine if springs are adequate for X cam is not by just looking at lift but at seat pressures. Spring has to exceed the cam needs on set pressures by a little margin to work.
The way to determine if springs are adequate for X cam is not by just looking at lift but at seat pressures. Spring has to exceed the cam needs on set pressures by a little margin to work.
Originally Posted by danf1000
anybody know if these be reliable with a xtreme lobe at 560 lift??
would the higher ramp rate necessitate changes every year??
would the higher ramp rate necessitate changes every year??
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From: Memphis, Tennessee
I was going to buy a set of stock LS6/LS2 heads fully assembled and a cam to go with it. Not wanting a cam that will wear out the springs and have to replace them every 25k miles.
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ya those springs are only good until .550 lift, the previous owner of my car installed them with titanium retainers, SLP blueprinted pump and a double roler chain. Why he didn't install a cam and 918's is my concern??? Anyways, I am in the same boat but will defintely just get the 918 or dual springs when I install a cam. Actually, going to save up and do the heads at the same time. Make's send to me to do it once and do it right, tehn no worries down the road. More power to 
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
02 LS6 springs or green: max lift ~.580
O.D
I.D:
seat pressure: 90 @ 1.800
open pressure: 294 @ ?
03+ LS6 springs(orange): max lift ~.580
O.D
I.D:
seat pressure: 90 @ 1.800
open pressure: 294 @ ?
These are the specs, so .580 as I said, LPE run those on their famous GT2-3 cam (and others) which has .571 lifts but with soft rate of lobes.
(See my post above)
O.D
I.D:
seat pressure: 90 @ 1.800
open pressure: 294 @ ?
03+ LS6 springs(orange): max lift ~.580
O.D
I.D:
seat pressure: 90 @ 1.800
open pressure: 294 @ ?
These are the specs, so .580 as I said, LPE run those on their famous GT2-3 cam (and others) which has .571 lifts but with soft rate of lobes.
(See my post above)
predator:
i'm just interested in the durability given ramp rate. In my opinion, it would probably be based on first-hand experience. open and closed rates might not fully describe things as nodular resonant frequency, which probably is a function of density, spring cross-section, shear modulus, etc....
i certainly understand your position on repeated unknowledgeable post-dragging..... this is something we cannnot help. it is best left unsaid what the more knowledgeable moderators contribute to everyone's planning and implementation of their own goals.
but i am simply looking for first-hand experience, which is certainly better than mathematical prediction, given the complexity of the situation and the absoluteness based on millions of miles. this is a question i have posed before.
i just want first-hand experience with this issue! what ramp rate is the limit, given lift. both comp and crane have lobes at around 550-563 lift. how reliable are LS6 springs in this situation?? anybody have input??
i'm just interested in the durability given ramp rate. In my opinion, it would probably be based on first-hand experience. open and closed rates might not fully describe things as nodular resonant frequency, which probably is a function of density, spring cross-section, shear modulus, etc....
i certainly understand your position on repeated unknowledgeable post-dragging..... this is something we cannnot help. it is best left unsaid what the more knowledgeable moderators contribute to everyone's planning and implementation of their own goals.
but i am simply looking for first-hand experience, which is certainly better than mathematical prediction, given the complexity of the situation and the absoluteness based on millions of miles. this is a question i have posed before.
i just want first-hand experience with this issue! what ramp rate is the limit, given lift. both comp and crane have lobes at around 550-563 lift. how reliable are LS6 springs in this situation?? anybody have input??
Originally Posted by danf1000
i'm just interested in the durability given ramp rate. In my opinion, it would probably be based on first-hand experience. open and closed rates might not fully describe things as nodular resonant frequency, which probably is a function of density, spring cross-section, shear modulus, etc....
Originally Posted by LS1BlackBird99
I was going to buy a set of stock LS6/LS2 heads fully assembled and a cam to go with it. Not wanting a cam that will wear out the springs and have to replace them every 25k miles.
Look for a sponsor like Patriot who sells those heads with a spring upgrade. A few hours a year in maintenance to check/replace springs is not that big a deal, is it? It's definitely worth some power over milder grinds.
On my T1 (221/221-112 that I just so happen to have for sale with a set of NIB springs) went 40k miles on a single set and when I pulled everything apart, the springs still had life left in them...may could have gotten 50k miles.
Launching!
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SDPC now has this cam, which looks like it might have potential, kinda similar to the ASA but with 115 LSA instead of 110
SDPC L92 / LS7 Custom Camshaft - 228/236, 0.566/0.551, 115
"This cam was designed to be used with the LS6 valve spring package to keep expense down and installation simple! Will work in 347ci LS1/LS6’s, LS2, L92, and LS7’s! Great cam for unported L92 heads or LS6 heads. Perfect upgrade for the LS7! Slightly less overlap than our N228 cam for excellent street manners but big enough to make a strong sounding idle".
They also have this one
Z+220 SDPC LS1 Custom Camshaft - 220/224, 0.551/0.551, 114
The Z-Plus 220 is a step above the venerable Z06 camshaft, excellent choice for stock cylinder heads and mild bolt-on upgrades. Good idle quality with a noticeable "cam upgrade" sound. We suggest the Z06 valve spring kit #12499224
lsit of their cams
http://www.sdparts.com/catalog/lsgen...Camshafts.aspx
SDPC L92 / LS7 Custom Camshaft - 228/236, 0.566/0.551, 115
"This cam was designed to be used with the LS6 valve spring package to keep expense down and installation simple! Will work in 347ci LS1/LS6’s, LS2, L92, and LS7’s! Great cam for unported L92 heads or LS6 heads. Perfect upgrade for the LS7! Slightly less overlap than our N228 cam for excellent street manners but big enough to make a strong sounding idle".
They also have this one
Z+220 SDPC LS1 Custom Camshaft - 220/224, 0.551/0.551, 114
The Z-Plus 220 is a step above the venerable Z06 camshaft, excellent choice for stock cylinder heads and mild bolt-on upgrades. Good idle quality with a noticeable "cam upgrade" sound. We suggest the Z06 valve spring kit #12499224
lsit of their cams
http://www.sdparts.com/catalog/lsgen...Camshafts.aspx
