Valve train woes LS3

[TurboBuick6]

OK guys. This was brought to my attention the other day. Seems the internet is full of professional engine builders anymore. I want to debunk a few "facts" in here.

First, on a street driven car turning 7K CB clearance is not a huge issue. I have a .650 lift cam with duration in the 240 range. I am .150" from coil bind and I turn 6,800 quite often. So this 0.060" from bind is not true. Every engine and combo is different. Some engine love well over 0.100" from bind were others love to be .040" from bind. There is no set height that is end all for all applications.

Second, if you think the 1208X has too much load, you are dead wrong. There are plenty of guys with over 500lbs over the nose on stock style rocker arms. Load does not kill trunnions it is the RPM. If you want to run big lift on a stock rocker then you need to address the geometry of that rocker.

So to say the spring load destroyed your valve train is not true. there is more than likely an underlying root cause. All you the professional key board engine builders think you know more than a company like lethal or BES? Come on, they both have a proven record of high end lasting power.

[litle88]

So it's brought to your attention and your here to tell us that some "engines" love certain coil binds? And that spring pressures are irrelevant?

Yea your here to kill a myth.

Thanks.

[TurboBuick6]

Originally Posted by litle88

So it's brought to your attention and your here to tell us that some "engines" love certain coil binds? And that spring pressures are irrelevant?

Yea your here to kill a myth.

Thanks.

Let's see here, I believe the Myth is your springs need to be at 0.060" cb no matter what. Seems to be the consensus of the keyboard jockeys. Second. Over 400lbs is not going to kill valves and trunnions. So yes, I am here to kill a myth.

[Rhino79]

So what is killing the valve tips even when rockers aren't failed if its not related to spring pressure?

We have numerous 7000+ rpm combos on stock rockers, so I'd be willing to say rpm alone is not the culprit of premature valve tip wear.

[TurboBuick6]

Originally Posted by Rhino79

So what is killing the valve tips even when rockers aren't failed if its not related to spring pressure?

We have numerous 7000+ rpm combos on stock rockers, so I'd be willing to say rpm alone is not the culprit of premature valve tip wear.

How much lift? Are you having valve bounce? Correct wipe pattern?

[SolomonAKOO]

[thahemp]

Originally Posted by TurboBuick6

OK guys. This was brought to my attention the other day. Seems the internet is full of professional engine builders anymore. I want to debunk a few "facts" in here.

First, on a street driven car turning 7K CB clearance is not a huge issue. I have a .650 lift cam with duration in the 240 range. I am .150" from coil bind and I turn 6,800 quite often. So this 0.060" from bind is not true. Every engine and combo is different. Some engine love well over 0.100" from bind were others love to be .040" from bind. There is no set height that is end all for all applications.

Second, if you think the 1208X has too much load, you are dead wrong. There are plenty of guys with over 500lbs over the nose on stock style rocker arms. Load does not kill trunnions it is the RPM. If you want to run big lift on a stock rocker then you need to address the geometry of that rocker.

So to say the spring load destroyed your valve train is not true. there is more than likely an underlying root cause. All you the professional key board engine builders think you know more than a company like lethal or BES? Come on, they both have a proven record of high end lasting power.

Originally Posted by TurboBuick6

Let's see here, I believe the Myth is your springs need to be at 0.060" cb no matter what. Seems to be the consensus of the keyboard jockeys. Second. Over 400lbs is not going to kill valves and trunnions. So yes, I am here to kill a myth.

I wonder why my knuckles are so banged up from typing? I must be doing it wrong.

[Rhino79]

Originally Posted by TurboBuick6

How much lift? Are you having valve bounce? Correct wipe pattern?

On my setups or the setups that have valve tip wear?

[TurboBuick6]

Originally Posted by Rhino79

On my setups or the setups that have valve tip wear?

that have valve tip wear.

[376LS3]

And who are you supposed to be that we just bend over and accept what you say as the word of God? You come in here telling us that some of the most respected builders on this site are wrong, and you don't give us any introduction to who you are or give us anything that shows you're credible. Are you an engine builder, do you manufacture springs, or a nut swinger? Give us something that shows we should give you the light of day.

[realcanuk]

Originally Posted by TurboBuick6

OK guys. This was brought to my attention the other day. Seems the internet is full of professional engine builders anymore. I want to debunk a few "facts" in here.

First, on a street driven car turning 7K CB clearance is not a huge issue. I have a .650 lift cam with duration in the 240 range. I am .150" from coil bind and I turn 6,800 quite often. So this 0.060" from bind is not true. Every engine and combo is different. Some engine love well over 0.100" from bind were others love to be .040" from bind. There is no set height that is end all for all applications.

Second, if you think the 1208X has too much load, you are dead wrong. There are plenty of guys with over 500lbs over the nose on stock style rocker arms. Load does not kill trunnions it is the RPM. If you want to run big lift on a stock rocker then you need to address the geometry of that rocker.

So to say the spring load destroyed your valve train is not true. there is more than likely an underlying root cause. All you the professional key board engine builders think you know more than a company like lethal or BES? Come on, they both have a proven record of high end lasting power.

Just what every forum needs. Another expert with no credentials or history here.

Seriously, if you think running too much pressure is fine, that's great. I just don't think you should tell other people it is.

I always advise people that asking questions on a forum is great, and can be informative, but before spending your money, or risking your engine (or life), speak to an expert that you trust unless you are knowledgeable yourself.

The post quoted is just more proof of this being sound advice.

[TurboBuick6]

Originally Posted by 376LS3

And who are you supposed to be that we just bend over and accept what you say as the word of God? You come in here telling us that some of the most respected builders on this site are wrong, and you don't give us any introduction to who you are or give us anything that shows you're credible. Are you an engine builder, do you manufacture springs, or a nut swinger? Give us something that shows we should give you the light of day.

If I am not mistaken, no engine builder said crap about the spring pressures, unless they themselves have thier own spring kits to sell.

No I am not an engine builder but i am in the valve spring business and have seen and spun more combonations than I can recal. And by spin I mean put on the spintron and test for valvetrain performance and spring performance. I am no nut swinger. I am who the pro's go to when they have issues.

[TurboBuick6]

Originally Posted by realcanuk

I always advise people that asking questions on a forum is great, and can be informative, but before spending your money, or risking your engine (or life), speak to an expert that you trust unless you are knowledgeable yourself.

Couldn't agree more with this statement. Just make sure you are asking someone who actually knows or who wants to sell you thier product.

If I recall correctly the patriot stuff was the best in the world untill they went under. After that the word on the WWW was get your patriot junk off before you blow your stuff up and switch it with these (same springs different name). Everyone took it as God's own word without even asking what the difference was, and if they did were just told not to worry about it.

[376LS3]

Originally Posted by TurboBuick6

If I am not mistaken, no engine builder said crap about the spring pressures, unless they themselves have thier own spring kits to sell.

No I am not an engine builder but i am in the valve spring business and have seen and spun more combonations than I can recal. And by spin I mean put on the spintron and test for valvetrain performance and spring performance. I am no nut swinger. I am who the pro's go to when they have issues.

Oh!!! Ok. That cleared up any hesitation I had. I'll go ahead and leave the 1208s on my car because the nameless man on C5 with 5 posts that came from nowhere said it was ok.