Broke Beehive Valve Spring
Originally Posted by 1slowZ28
So I called Summit(originally bought from) and they were more than happy to send some new ones.
TECH Resident
Joined: Jul 2005
Posts: 861
Likes: 0
From: Midland
Originally Posted by WhyHelloOfficer
I'm looking at the 986s when I start assembling my new set of heads. The PAC 1518s are the cream of the crop. Shon Herron actually has a killer deal right now on them.
Originally Posted by BlackScreaminMachine
What size cam and was the valve spring installed height verified on ALL springs, if your near max lift, you NEED to have that done. I had a Bauer cam which was a lil beyond 918 springs and the installed height was done by him. Never an issue.
I would suspect installer error before a mechanical failure.
I would suspect installer error before a mechanical failure.
With the massive amounts of people who are seeing this problem, I would say it's the other way around. Certain cases may be installer error, but I don't see it adding up to the huge numbers of people with broken springs. The way Comp is dancing around the issue like they are, something is wrong.
Originally Posted by Vicious95Z28
Uhhh, If I add shims it will close up my install height, besides Lloyd runs em tighter than that
I assumed the seats were machined, then you need valve caps, to extend the valve. I had comp cam 987 springs prior to the 918's and they machine for the larger diameter springs.
The other issue I see is people running radical cam lobes and not changing springs every season or so.
Last edited by BlackScreaminMachine; Jul 26, 2007 at 08:35 PM.
Originally Posted by BlackScreaminMachine
With the lifts people are running the spring need to be able to fully move/extend, its binding.
The other issue I see is people running radical cam lobes and not changing springs every season or so.
The other issue I see is people running radical cam lobes and not changing springs every season or so.
I agree with all of this. My install height was checked. checked checked again and checked another time. I spoke with Lloyd over the phone and he gave me a safe area. When my install heights were around 1.77-1.78, I was pleased and have been succesful thus far. I hope my streak of luck or a good batch of springs (whichever) continues.
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Launching!
Joined: Jun 2007
Posts: 212
Likes: 0
From: NC
Originally Posted by BlackScreaminMachine
With the lifts people are running the spring need to be able to fully move/extend, its binding.
The true solid height on a 918 (atleast when we made them) is ~1.065". THe advertised solid height is 1.140. Which is why a lot of people install .550-.600 lift cams at 1.750" on the 918s (now PAC-1218).
We are super conservative on the coil bind number so people don't try an run a .700 lift cam on a 918 (PAC-1218). While the spring can handle that much deflection. It can't reliably handle that stress range.
Last edited by Yeahdoug; Jul 27, 2007 at 11:25 AM.
to the guys not having issues.
can you post your batch numbers , just for the record.
if the batch numbers match some of the batch numbers, that are thouht of as "bad".
it would lead to another issue. now if they don't match the guys that haven't had issues yet can see your "good" batch numbers and have that fuzzy little feeling again in their belly.
YeahDoug
thanks for making a great product, glad my head guys gets thier springs straight from you.
can you post your batch numbers , just for the record.
if the batch numbers match some of the batch numbers, that are thouht of as "bad".
it would lead to another issue. now if they don't match the guys that haven't had issues yet can see your "good" batch numbers and have that fuzzy little feeling again in their belly.
YeahDoug
thanks for making a great product, glad my head guys gets thier springs straight from you.
