Comp 918 Springs
05-03-2006, 11:24 PM
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Comp 918 Springs Would I gain anything if I put these on my basically stock car? I have lid, longtubes with true duals (installing Saturday), and ported and polished TB. I am not retarded, im not considering buying a new set to put on my stock motor, but I found a set cheap with 5K miles on them. I was just wondering if it would do anything or hurt anything? I think it would get rid of the "hanging RPM's" that stock motors have when you rev it up and it takes forever for the RPMs to return to idle. BTW, I will be getting a cam in the summer, how good is the lift on those springs?
05-03-2006, 11:31 PM
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918s I just put on a brand new set on my Blown 02 Z06 with its 100% stock LS6 motor and ECS D1SC Blower. This is a great replacement spring for a stock spring replacement and is very battle tested on many aftermarket performance cams and the lift is golden up to .600, so you should be good to go unless your cam is going to be bigger than that.
If your going to be doing a cam you are going to need springs anyways, and these are a great single spring, but if you are going with an aftermarket perf. cam as you say you are I myself like the peace of mind of a dual spring offered by PRC GOLDS or the PAtriot gold springs, that give you a little extra insurance about holding up a valve if a spring breaks.
I went with the 918s on my LS6 motor as i am staying internally stock for now and this is the logical upgrade replacment heavy duty battle tested singel spring for stock motors or motors running cams up to .600 lift!
HOPE THAT HELPS and no, you should not be hurting anything if you stay stock for awhile if you upgrade as i just did a lot of research on this issue for my stock Z06 (LS6) motor!
If your going to be doing a cam you are going to need springs anyways, and these are a great single spring, but if you are going with an aftermarket perf. cam as you say you are I myself like the peace of mind of a dual spring offered by PRC GOLDS or the PAtriot gold springs, that give you a little extra insurance about holding up a valve if a spring breaks.
I went with the 918s on my LS6 motor as i am staying internally stock for now and this is the logical upgrade replacment heavy duty battle tested singel spring for stock motors or motors running cams up to .600 lift!
HOPE THAT HELPS and no, you should not be hurting anything if you stay stock for awhile if you upgrade as i just did a lot of research on this issue for my stock Z06 (LS6) motor!
05-03-2006, 11:38 PM
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Cool thanks for the info. Could you notice any difference with the springs? The lift on the cam I am wanting is right below .600, here are the specs: Comp- XE-R 228/232 .588/.595 110LSA +2.
Another question I have, don't most people just take their old springs off and put the new ones in? Most people don't measure the installed height and all of that do they??
Another question I have, don't most people just take their old springs off and put the new ones in? Most people don't measure the installed height and all of that do they??
05-04-2006, 12:03 AM
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Originally Posted by 97MysticZ
Cool thanks for the info. Could you notice any difference with the springs? The lift on the cam I am wanting is right below .600, here are the specs: Comp- XE-R 228/232 .588/.595 110LSA +2.
Another question I have, don't most people just take their old springs off and put the new ones in? Most people don't measure the installed height and all of that do they??
Another question I have, don't most people just take their old springs off and put the new ones in? Most people don't measure the installed height and all of that do they??
With the car your running, which is fairly aggressive, I would DEFINITELY run a dual spring that does not require machiningg of the stock heads like the PRC DUALS, Patriot GOLDS or comp 921s (great springs but more bucs). ALL of these dual springs come with titanium retainers also and locks, etc.
This is the way for you to go if that is the cam you will be runing as that second spring gives you extra insurance of holding up a valve if you have a spring failure. The 918s would probably do the job also but to me, the duals give you better piece of mind and I almost did one of the above duals with lil tiny LS6 cam!
05-04-2006, 12:40 AM
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I would not buy used springs.
But Yes I would run 918's on the cam you mentionned but with titanium retainers.
918's will handle .620 lifts.
They are the best springs available on the market for this range of lifts.
Some high reving cams need higher seat pressures, so the springs can be shimmed.
But Yes I would run 918's on the cam you mentionned but with titanium retainers.
918's will handle .620 lifts.
They are the best springs available on the market for this range of lifts.
Some high reving cams need higher seat pressures, so the springs can be shimmed.
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05-04-2006, 07:18 PM
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Originally Posted by jdoyle
can i run longer than usual since i am only running a tr224 cam? or does the size not play that big a role in spring life?
The 918's are great springs. Not worth changing out the stockers unless you have a good reason though. Piece of mind on a blown car, aftermarket cam (any size up to .605 in lift), broken stock spring.
Spring changes are done mostly when a cam is swapped in, for the obvious reasons.
05-04-2006, 09:20 PM
#12
i believe that the cam is an LSK lobes, if all of thunder racings cam are on the same lobe, did you want to know if it is a 112 or 114, its a 112.
its my daily driver and i dont really drive very much but the weekends cuz of school and working, and i dont beat on it, so i think i driver her pretty easy.
its my daily driver and i dont really drive very much but the weekends cuz of school and working, and i dont beat on it, so i think i driver her pretty easy.
05-04-2006, 09:21 PM
#13
Originally Posted by Mr. Luos
How hard the car is driven and the lobes on the cam.
The 918's are great springs. Not worth changing out the stockers unless you have a good reason though. Piece of mind on a blown car, aftermarket cam (any size up to .605 in lift), broken stock spring.
Spring changes are done mostly when a cam is swapped in, for the obvious reasons.
The 918's are great springs. Not worth changing out the stockers unless you have a good reason though. Piece of mind on a blown car, aftermarket cam (any size up to .605 in lift), broken stock spring.
Spring changes are done mostly when a cam is swapped in, for the obvious reasons.
its my daily driver and i dont really drive very much but the weekends cuz of school and working, and i dont beat on it, so i think i driver her pretty easy.
05-04-2006, 11:49 PM
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Originally Posted by vettenuts
I wouldn't install these springs on a stock motor without a pushrod change as well, or you are asking for bent pushrods.
05-05-2006, 12:30 AM
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Originally Posted by PREDATOR-Z
But Yes I would run 918's on the cam you mentionned but with titanium retainers.
05-05-2006, 12:48 AM
#16
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Originally Posted by okls1
I have the same exact cam coming a comp xer, I ordered the 918's, but I will be using stock retainers. Is this a problem? Why the ti retainers with 918s they are already lighter then duals? Just wondering to make sure dont jack up my valvetrain. Thanks
1- One point of beehive is lighter valverain for more power. So the lighter you can go the better.
2- The stock retainers do not fit as good as Comp Titaniums and side to side play is present therefore taking away some of that awsome harmonic control those springs have..
05-05-2006, 12:38 PM
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Ok thanks, but I just didn't want to spend the extra $200+ on retainers or I should have just gone with duals... As long as it wont cause problems I will just have to live with couple less hp cus im cheap. 
05-07-2006, 05:35 PM
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If you're wanting to upgrade to a better spring for a stock car, why not just go with LS6's? There's no need for 918's on a stock motor, and all you're doing is just putting more pressure on the lifters when it's not needed. The stock springs are a beehive design and IMO a decent piece for a stock cam. We're not dealing with LT1's here. The stock springs in those are a different story, especially on the Impala's. 
Jason
Jason
