Torquer + 918's = BOOM ?
Originally Posted by Unaffiliated Racing
That is just one of the cams I personally run. They are set-up at a standard 1.800" and yes at that height the 918 is good for a .650" lift and still .065" before coil bind 
Also if you got a second mind helping me with a solid roller set of beehives and pricing?
So why is it everyone I talk to about springs for my next cam(FM cam in the 23x/23x 59x/600 range) always points me in the direction of dual springs? I'd really like to run single springs if it'll hold that cam. I realize everyone has their preference, and sponsors want to make a buck, but even members are always biased towards duals. Would 918's w/tit retainers hold a cam of those specs w/cam motion lobes?
Originally Posted by MUSTANGEATER
That's still a pretty safe margin, any specific reason why the being good to .650 lift isn't advertised then?
Also if you got a second mind helping me with a solid roller set of beehives and pricing?
Also if you got a second mind helping me with a solid roller set of beehives and pricing?
Originally Posted by Master Chief
liability I imagine....not having to deal with people who push the actual limits, break something, and want comp to cover the fix
Originally Posted by cyphur_traq
So why is it everyone I talk to about springs for my next cam(FM cam in the 23x/23x 59x/600 range) always points me in the direction of dual springs? I'd really like to run single springs if it'll hold that cam. I realize everyone has their preference, and sponsors want to make a buck, but even members are always biased towards duals. Would 918's w/tit retainers hold a cam of those specs w/cam motion lobes?
It's because of the first batch problem. Everyone including the shops are gun shy. These springs have been tested to the limits. Comp does more spring testing that Ford, Chrysler, and GM. I would put a 918 and a Ti retainer on that cam in a heartbeat.
Last edited by Brian@SpectacleSolutions; Mar 8, 2005 at 12:46 PM.
Staging Lane
Joined: Jan 2004
Posts: 93
Likes: 0
From: Elmira, NY
Originally Posted by Master Chief
liability I imagine....not having to deal with people who push the actual limits, break something, and want comp to cover the fix
Thread Starter
TECH Regular
Joined: Nov 2003
Posts: 488
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From: Bay Area/ UCI-VDC norte
Originally Posted by superslowjoe
I see that cam is on sale right now also, hmmmmmmm I WANT ONE, I have 918's in my car now, guess that would be a easy swap then.
Launching!
Joined: Nov 2001
Posts: 213
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From: Indy
So after reading this thread, it makes me feel much more comfortable puttin 918's in my Goat with a 228/228 .588/.588 112 on an XE-R lobe. Thanks for the info guys.
Also one other thing, should I put Ti retainers on as well to help reduce valvetrain weight and help with spring life a little as well. Should I go ahead and change the timing chain as well, the car only has 2200 miles or so on it?
Also one other thing, should I put Ti retainers on as well to help reduce valvetrain weight and help with spring life a little as well. Should I go ahead and change the timing chain as well, the car only has 2200 miles or so on it?
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Teching In
Joined: Mar 2005
Posts: 38
Likes: 0
From: Davie Fla.
Originally Posted by AnthonyR
If you are that concerned I'd say go with a set of PRC dual's for piece of mind. Spend a little extra now, or a lot later 
Last edited by C5 Purple Haze; Mar 11, 2005 at 10:53 AM.
TECH Regular
Joined: Feb 2004
Posts: 451
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From: Indy
Originally Posted by cyphur_traq
So why is it everyone I talk to about springs for my next cam(FM cam in the 23x/23x 59x/600 range) always points me in the direction of dual springs? I'd really like to run single springs if it'll hold that cam. I realize everyone has their preference, and sponsors want to make a buck, but even members are always biased towards duals. Would 918's w/tit retainers hold a cam of those specs w/cam motion lobes?
I installed a TR224 w/ 918s and Ti retainers and ran that for about a year. Then I installed a FM11 (228/230 .595 .595 112) and it has been in the car for about a year. I just left the 918s in there since Futral recommend them. The springs may have around 6,000 miles on them now and no BOOM yet!
Originally Posted by C5 Purple Haze
I could not agree more. With all of the great dual springs that are now available. Why take a chance with a single spring.
On The Tree
Joined: Jun 2003
Posts: 154
Likes: 0
From: North Palm Beach, FL.
My 422 has a 242/244 610/612 and I have the 918 springs.
The engine builder took me in the back and put a 918 in a vise.
He tightened the spring to the installed height.
He then put a caliper on the spring and began to tighten it down.
The spring went to .765 before coil bind.
I have almost 6000 miles on it now and last week after some tweaking got 478 rwhp and 480 tq.
That is on a stock TB and LS6 intake.
I bought the new Nick Williams 90mm TB last week and matching LSX.
I am hopeing for 510 RW with the new setup.
I'll post dyno #s when I'm done.
So to answer the spring question, mine work fine so far.
The engine builder took me in the back and put a 918 in a vise.
He tightened the spring to the installed height.
He then put a caliper on the spring and began to tighten it down.
The spring went to .765 before coil bind.
I have almost 6000 miles on it now and last week after some tweaking got 478 rwhp and 480 tq.
That is on a stock TB and LS6 intake.
I bought the new Nick Williams 90mm TB last week and matching LSX.
I am hopeing for 510 RW with the new setup.
I'll post dyno #s when I'm done.
So to answer the spring question, mine work fine so far.
TECH Fanatic
Joined: May 2003
Posts: 1,292
Likes: 6
From: RainbowCity,Alabama
Anyone that uses a 918 want to gain a few hundred more RPM?PRC now has a titanium retainer to fit the comp 918 springs.The price is very competitive.Call or PM for details.
Under certain conditions the single spring will eat up less HP than a dual.On lagre cams,the duals make me feel better.
Under certain conditions the single spring will eat up less HP than a dual.On lagre cams,the duals make me feel better.
Originally Posted by BBADWS6
I say you will be fine.
i can say this. it surprise's me that there are so many out there using 918's and not breaking. except Vince. you have nothing to fall back on if a single spring breaks. bent valve busted piston. etc. at least in most cause's when a dual spring breaks. you have the inner spring supporting the valve and your chance's of damage is way less. Mechman has broke a couple of the duals and the the inner spring was there to save the motor. he bought a heads from a car with 6 bent valve's from the top. car was in an really bad accident and the head most of impacted something that bent the top of the valves. so when you spend all the money on a built motor. why would you get cheap on springs and not go with something a little more dependable and safer. Last edited by BLUEBALLS ZZ; Mar 12, 2005 at 08:56 AM.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
at least in most cause's when a dual spring breaks. you have the inner spring supporting the valve and your chance's of damage is way less
Very, very few, I can only remember 2 maybe 3 cases since the last 2 years, and none of these could prove they were installed at proper height and not just slapped in there.
As stated before the harmonics of that spring are amazing, high rpm stability is exceptional, and then weight. Why do most duals use titanium retainers? Because we all know that the lighter the valvetrain, the lesser the chance of valve float and the easier it is on the valves/guides/cups ESPECIALY with fast ramps.
I used to think the same, duals are safer. Untill I used the 918's and have seen them used on .600+ XE-R ramps.
I have no doubt in my mind that they are one of the safest, best, lightest, best springs designed so far.
And BTW at an average $168 for a set, they are not cheap.
