Review: Comp Cams New Conical Valvesprings for LS Engines
02-17-2017, 11:31 AM
#42
TECH Fanatic
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.
09-09-2017, 04:24 PM
#43
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I'm no expert but maybe the failure came from the fact that you didn't use the proper valve spring locators. Although the springs do fit around the stock style seal/locator they fit awfully loose around it. Also being your spring broke right near the bottom pretty much confirms that in my mind Just a thought
09-10-2017, 08:53 AM
#44
I'm no expert but maybe the failure came from the fact that you didn't use the proper valve spring locators. Although the springs do fit around the stock style seal/locator they fit awfully loose around it. Also being your spring broke right near the bottom pretty much confirms that in my mind Just a thought
I'm open to taking the blame, I'll be happy to learn something new if it is my fault, but so far nothing really makes sense except for a flaw in the material or heat treating.
09-10-2017, 01:13 PM
#45
TECH Senior Member
thinking out loud:
if the harmonic damper was not doing its job properly, would the harmonics be soaked up by the timing chain, or could they be seen by the first lobe on the cam...?
if the valve spring had a physical (metallurgy) defect, then the runaway harmonics might make it worse.
if the harmonic damper was not doing its job properly, would the harmonics be soaked up by the timing chain, or could they be seen by the first lobe on the cam...?
if the valve spring had a physical (metallurgy) defect, then the runaway harmonics might make it worse.
09-20-2017, 07:50 AM
#46
10 Second Club
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I have a freind that runs these springs on his dirt car ls motor. He puts them on a set of gmpp ls3 heads and runs it to 8kish rpm with a hydraulic cam even. Now i haven't been a fan of comp springs for quite some time. But he has good results with them.
Maybe op got a bad batch. Maybe something else goin on there. Weight of valve maybe....lobes to aggressive. Maybe even something like oil pressure not keeping the lifter pumped like it should be.
Maybe op got a bad batch. Maybe something else goin on there. Weight of valve maybe....lobes to aggressive. Maybe even something like oil pressure not keeping the lifter pumped like it should be.
09-20-2017, 09:39 AM
#47
TECH Senior Member
Would be cool if one could know how many got sold, and how many failed? Likely a deep, dark, secret....
