acpm

You do realize people reply to 2 year old threads, right? That it's actually convenient because he's had 2 years of experience with these springs.

acpm

That would be a shame... I hope it wasn't the case. Thank you though.

KCS

iTrader: (20)

Yeah, one of them broke. Almost done with the new engine though. It has dual springs...

ddnspider

iTrader: (26)

Ouch, sorry to hear about the motor. Did it break under high rpm/strain? I assume it wasn't install error knowing your background, so maybe there is something to be said about the control/safety of dual springs.

KCS

iTrader: (20)

It broke as I was just cruising home from a movie. I hadn't gone over 4000 RPM since the swap and it broke at around 2000 RPM.

ddnspider

iTrader: (26)

dannnnng. So much for single/conicals.

KCS

iTrader: (20)

Finally got the head off today. Honestly, I think I got lucky. I could probably have the head fixed or replaced and have it running again in a week or two.

ddnspider

iTrader: (26)

That is impressive, not sure I've ever seen a valve that shape before lol.

KCS

iTrader: (20)

Yeah I know! It's definitely going on the wall of shame right next to the broken spring.

slogo

In the picture with the valve seat, what is the mark to the right of the valve guide? Is that where the valve came
through and hit it?

KCS

iTrader: (20)

Yep, it beat it up a little but it doesn't seem to have really hurt anything.

Jase01

So it would be fair to say not a positive review KCS?

Sorry to hear your bad fortune, are Comp helping out with some funds at all (other than maybe just the cost of the springs) or is it pretty much bad luck, black duck?

Jason.

HioSSilver

iTrader: (8)

If you want a good spring stay away from comp. Look into a set of psi beehives. They are even lighter than the comp conical and way better quality.

slogo

It's too bad there is no other safety mechanism other than spring retainers or double springs to keep valves from falling down.

KCS

iTrader: (20)

I hate to blame Comp without knowing why it broke, but I'm pretty certain there was nothing wrong with the way they were installed or handled that could have caused this.

They haven't come outright and said anything about money or reimbursement, but I haven't gotten much of a reply when I emailed them. All I really want is for them to take the springs back and determine a root cause. If there was something wrong with the spring, hopefully they can use the info to make a better product. If I did something wrong, then I'll learn from it. I hope to hear back this week.

HioSSilver

iTrader: (8)

The safety mechanism is don't buy junk springs. It's not like comp has some great rep on springs. Remember all the 918s that broke?

sjsingle1

iTrader: (1)

I dont see these springs on their website anymore......

Jase01

A very mature reasonable approach, I fully appreciate with modified engines and the nature of their use there's always a risk of component failure, and getting/expecting refunds is a sketchy prospect.

But given your apparent experience and attention to detail based on your posts on here and the fact it's really only a fairly new product, I don't think it would be unreasonable to expect Comp to help you out with some funds if it's proven their component failed in such a short time.

07NBSChevy

iTrader: (1)

After reading about the failure KCS had a few weeks ago, I researched these springs more and noticed they did have a bunch of failures on these. I wonder if it was related to the Comp 918's and metal fatique. Possibly bad metal used.

A.R. Shale Targa

iTrader: (2)

Funny thing that back when lobe technology for the LS was basically retro-fitting Big Block Ford cam blanks (.540"-.568" lifts) there were almost no 915/918 spring failures. Once the new wave of LS specific stuff began pushing .580"-.610" lift and maximizing the tip motion of a factory rocker: Beehives basically "tapped out"...............then quality dual kits became all the rage.
I've used hundreds of sets of Comp Cams springs over the last thirty years with ZERO FAILURES. I haven't the faintest clue which company makes them for Comp. DON'T CARE
From stock pressure stuff to high RPM road racing roller cams in the 900 psi open pressure range. Plenty friends of mine have used triple stuff for .900" lift drag applications.
Springs have a brutal life and the entire valv etrain needs to be a planned out entity.
At 7000 rpms each valve opens/closes something like 58 times per second
At 9000 that number jumps to 87 times per second.....quite insane really
KCS knows his **** and sweats the details................NO DOUBT
but perhaps this is just a case where a single coil, no matter it's shape or weight, just simply can't keep all things in check, at any rpm.......