roller rocker recommendation
Melting Slicks
Joined: Dec 2004
Posts: 3,120
Likes: 119
St. Jude Donor '10
The second part, it is an easy way to pick up lift and consequently power without breaking back into the engine again. No one seems to be looking at the other comp rocker arm offerings for some reason. Such as their ultra gold (alum) or the ultra pro mag kits. The Alum use a pedestal like the scorp and can be adjstable or non adjust with their mount and the Ultra Pro Mags can be the same way. Although i do not like PR guides, comp gives you the option to not have to use them now, where before they didnt. Sometimes the lobe design is good, but the lift is just weak.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Where did you get this information from? I can think of at least three instances where someone popped a rocker CRUISING.
OP, do a search on here and on LS1tech about the YT rocker failures. In the last 2-3 years, they seem to be the only ones (other than stockers puking needle bearings) that anyone posts about failing.
OP, do a search on here and on LS1tech about the YT rocker failures. In the last 2-3 years, they seem to be the only ones (other than stockers puking needle bearings) that anyone posts about failing.
Just the fact that the new ones are called "ultralights" seems to indicate they were trying to change their perception that the older ones were to heavy----Also going by what my engine builder tells me and I trust his advice 100%
Melting Slicks
Joined: Dec 2004
Posts: 3,120
Likes: 119
St. Jude Donor '10
The "new ones" werent called ultralights. They have been known under that name for quite some time.
Ive seen stock rockers pull apart like silly putty right around the bottom of the runion and break there as well. But people use stock rockers all the time.
It is merely a perception by any given person at any given time.
I personally like the scorpions and will likely use them on the next LS engine i build for my personal setup(s).
Ive seen stock rockers pull apart like silly putty right around the bottom of the runion and break there as well. But people use stock rockers all the time.
It is merely a perception by any given person at any given time.
I personally like the scorpions and will likely use them on the next LS engine i build for my personal setup(s).
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
Melting Slicks
Joined: Dec 2004
Posts: 3,120
Likes: 119
St. Jude Donor '10
I didnt say i saw it on the internet. I said I saw it. As in personally. I am sure you can do a search on it and find some out there.
http://www.ls1.com/forums/f7/broken-rocker-arms-132013/
there is a thread from a quick .16 second internet search. It does happen.
And if it breaks down there, it is going to spill the bearings.
There was a thread on tech I believe a while back that had actual pictures of them breaking the same way.
http://www.ls1.com/forums/f7/broken-rocker-arms-132013/
there is a thread from a quick .16 second internet search. It does happen.
And if it breaks down there, it is going to spill the bearings.
There was a thread on tech I believe a while back that had actual pictures of them breaking the same way.
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
I didnt say i saw it on the internet. I said I saw it. As in personally. I am sure you can do a search on it and find some out there.
http://www.ls1.com/forums/f7/broken-rocker-arms-132013/
there is a thread from a quick .16 second internet search. It does happen.
And if it breaks down there, it is going to spill the bearings.
There was a thread on tech I believe a while back that had actual pictures of them breaking the same way.
http://www.ls1.com/forums/f7/broken-rocker-arms-132013/
there is a thread from a quick .16 second internet search. It does happen.
And if it breaks down there, it is going to spill the bearings.
There was a thread on tech I believe a while back that had actual pictures of them breaking the same way.
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Melting Slicks
Joined: Dec 2004
Posts: 3,120
Likes: 119
St. Jude Donor '10
http://www.camaro5.com/forums/showthread.php?t=331500
there is one recently although it is rather vague and hard to tell the real reason nor are there pictures. But not everyone posts up their lunch and engine carnage on the internet.
and another one from tech
http://ls1tech.com/forums/generation...ke-rocker.html
although again no pictures, but a full account....
there is one recently although it is rather vague and hard to tell the real reason nor are there pictures. But not everyone posts up their lunch and engine carnage on the internet.
and another one from tech
http://ls1tech.com/forums/generation...ke-rocker.html
although again no pictures, but a full account....
Last edited by COSPEED; Mar 23, 2014 at 12:41 AM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Curious, did you install the heavier pushrods when you did the cam or were they installed later? If later, wondering if you have any before and after dyno curves as I saw a nice stability change and wondering if you saw something similar.
Burning Brakes
Joined: Jul 2006
Posts: 968
Likes: 12
From: Regina Sask
I installed YT Ultralite's on my TFS 215 heads back in March 2009. The heads come with 450 open psi springs, and I used 7.5 Comp 5/16" pushrods. Also had the G5X3 234/242/.600 .610 114 XER cam. I always used Mobile 1 15W-50 oil, and use a 160* stat to keep the engine temps down. And my fuel shut off is at 7100 rpm.
In October 2011, #5 piston let go destroying the block. So I installed a TSP 418 stroker & reused the cam and heads. Last year I installed an EPS 234/242/.600/.615 117+2 cam. Also installed the BTR Platinum valve springs that have ~50psi LESS open pressure. So I'm sure that I'll never break a rocker arm.
What open spring pressures are used that's causing the rocker failures? YT also makes a Platinum series rocker for extreme valve spring loads.
Russ Kemp
In October 2011, #5 piston let go destroying the block. So I installed a TSP 418 stroker & reused the cam and heads. Last year I installed an EPS 234/242/.600/.615 117+2 cam. Also installed the BTR Platinum valve springs that have ~50psi LESS open pressure. So I'm sure that I'll never break a rocker arm.
What open spring pressures are used that's causing the rocker failures? YT also makes a Platinum series rocker for extreme valve spring loads.
Russ Kemp
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Brian has posted a lot of good information on the stock rocker and where you get in trouble with it. I tried for quite some time to get the stockers to work on my setup but wasn't happy with the results hence the move to YT's.
Curious, did you install the heavier pushrods when you did the cam or were they installed later? If later, wondering if you have any before and after dyno curves as I saw a nice stability change and wondering if you saw something similar.
Curious, did you install the heavier pushrods when you did the cam or were they installed later? If later, wondering if you have any before and after dyno curves as I saw a nice stability change and wondering if you saw something similar.
I came out of the gate with those pushrods. The motor is all new and not even installed yet. Trying to finish up the current customer project so I can bring mine in and get on it.
