Who's running 918's w/ .600"?
#1
Who's running 918's w/ .600"?
I've talked to a LOT of people about this including Comp and TR. I'm running .597" on 918 springs, and was wondering how many of you out there are doing the same / similar thing? TR told me to check 'em every 30k miles, but was wondering what you guys were doing? Thanks.
#2
Probably not many people at all are doing that, thats not so smart, because the max lift is only .600" . There are a lot better spring choices out there for .597" Lift.
But thats jsut my opinion, I am by no means an expert.
But thats jsut my opinion, I am by no means an expert.
#3
I ran a 231/237 .598/.595 for a while on 918's.. changed over to duals for piece of mind and sold the 918's to a local guy with a TR230.. he's still running the hell out of it over a year later without a problem.
#4
Originally Posted by SLVRZLS1
Probably not many people at all are doing that, thats not so smart, because the max lift is only .600" . There are a lot better spring choices out there for .597" Lift.
But thats jsut my opinion, I am by no means an expert.
But thats jsut my opinion, I am by no means an expert.
#5
Originally Posted by CaptUSA
Who's running 918's w/ .600"?
#6
I'm not sure why so many people think that 918s are just a ticking time bomb. Do a search on here and try to find a post where a 918 blue stripe failed. You wont find anything. .600" lift is still .115" away from coil bind. Good springs can be run as close as .060" from coil bind. They were designed for .625" lift originally, then comp mysteriously lowered that to .600" when their $500 921 duals came out??HMM... Beehive springs are progressive rate too, duals are not. I've been running 918s and so have several other buddies and they have all been trouble free. You'll be fine running them, but I would definitely recommend checking the spring pressures at 25k. I like my lightweight 918s, over heavy *** duals that need more spring pressure just to control their own weight, putting more strain on the valvetrain.
#7
Im running the 918's with the FM7 cam which has a lift of .587 .593. I have been driving the car for a whole year now and running the car hard at the road course tracks with no problems. I'm going to go with the 6.0 heads and 921's when i install my SC just for safety.
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#10
Originally Posted by MyLS1Hauls
They were designed for .625" lift originally, then comp mysteriously lowered that to .600" when their $500 921 duals came out??HMM...
Hmmmm indeed. That is very intersting, I'd never heard that before. That's great! It makes sense too. Companies do it all the time. In fact, GM did a similar thing w/ the F-body if I'm not mistaken. To help boost sales of the Vette flagship platform.
#11
There have been...NO blue stripe failures. Also it was only one batch of the Non-stripes that had that issue. Those springs can safely handle a .650"..leaving you .060" before coil bind. A beehive style spring works even better the closer you run it to coil bind
#12
check out this thread :
https://ls1tech.com/forums/showthrea...lue+stripe+918
and then check out vince's post, which is #20(end of page 1) and on....
https://ls1tech.com/forums/showthrea...en+blue+stripe
and this one:
https://ls1tech.com/forums/generation-iii-internal-engine/114237-link-pic-what-blue-striped-918-s-did-my-motor.html
all talking about blue stripe failure(the last two strictly concerning vince's).
the blue stripe 918's are great springs. very dependable. countless people have ran countless cams w/o ANY problems. don't get me wrong...i'm not trying to knock the springs here. just pointing out that yes...the springs have failed before.
https://ls1tech.com/forums/showthrea...lue+stripe+918
and then check out vince's post, which is #20(end of page 1) and on....
https://ls1tech.com/forums/showthrea...en+blue+stripe
and this one:
https://ls1tech.com/forums/generation-iii-internal-engine/114237-link-pic-what-blue-striped-918-s-did-my-motor.html
all talking about blue stripe failure(the last two strictly concerning vince's).
the blue stripe 918's are great springs. very dependable. countless people have ran countless cams w/o ANY problems. don't get me wrong...i'm not trying to knock the springs here. just pointing out that yes...the springs have failed before.
#13
OK, well theres two documented failures of 918s, which i honestly missed (not usually around here in the fall/winter). I dont know the installed height of those springs or what they went though, so who knows what the cause was. Two instances are not nearly enough to get your panties in a bunch over. You know how many thousands are out there working perfectly? Manleys have failed, 987 and 978s, 941s, 295D, Patriot, REVs 1116, and the Crane duals have all failed...From what I've seen 918s have the best success rate, single or dual. Sure when/if they do fail it will probably be pretty catastrophic, but **** happens when you're pushing the limits. I'd still like to hear from someone who popped a dual spring at 6k...I'll bet it wont be good.
#14
I've got over 55,000 miles on my 918's with .589 lift cam, no valve float, still dyno's the same amount @ the tires as when I first put them on spinning the motor to 6700 RPM all the time. I'm am in no way recommending you do this, however I have not had a SINGLE issue with them.
#15
true, 918's have had a great run, they're great springs. i am just not going to take the risk and run my 231/237 on them, on the off chance that i'm the third person that does snap one and i drop a valve. at least with PP gold duals i'll have something there still holding it up somewhat....to limp to the side of the road or next parking lot.
#16
I have 918's on my cam, F1 (.591/.569), the owner before me had like 10k miles on them and me wanting to penny pince i installed them on my car, now the springs have a total of 18k miles and no problems what so ever. I have not dyno'd to see if im losing power because of them but the car feels just as powerful as normal.
#17
Originally Posted by gomer
I ran a 231/237 .598/.595 for a while on 918's.. changed over to duals for piece of mind and sold the 918's to a local guy with a TR230.. he's still running the hell out of it over a year later without a problem.
#19
And where's all these threads on Manley springs failing?
Sure the 918's are great and used in a stack of cars, but by the sounds of your posts it makes you out to be a spokesman for COMP. You don't work in the advertising department do you?
Joking buddy, gotta have a laugh here and there.
Sure the 918's are great and used in a stack of cars, but by the sounds of your posts it makes you out to be a spokesman for COMP. You don't work in the advertising department do you?
Joking buddy, gotta have a laugh here and there.