Any reliable LS roller rockers?
Thread Starter
Staging Lane
Joined: Mar 2024
Posts: 66
Likes: 15
Any reliable LS roller rockers? I am looking at options for roller rockers on my 408 ( I have tfs-215s with bronze guides so stocks are out of the question.) I’ve seen good things about the yella terra ultralites but they seem to be hard to get in the US without paying a premium. I’ve heard bad things about the Harland sharp’s like issues with breaking, I’ve read similar issues with about every roller rocker out there. I’m also worried about the extra weight causing valve float, that’s why I am leaning towards the YT’s as I’ve read they are relatively light and don’t cause issues in with valve float. Are there any roller rockers that are reliable and won’t break after 5k miles?
Thread Starter
Staging Lane
Joined: Mar 2024
Posts: 66
Likes: 15
I've seen the TSP steel roller rockers and have considered those but the only hangup for me is they are 1.72 rockers and I had my cam ground to use a 1.7 rocker. With a 1.72 rocker it adds .007" of lift on the intake and .005" of lift on the exhaust to my .621/.604 specs. Not sure if that would actually cause a problem though. They also use stock pedestals which won't fit in my trickflow heads so I would have to run prw pedestals or machine the OEM ones.
Last edited by Fireballmatt15; Jul 22, 2024 at 02:48 PM.
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I've seen the TSP steel roller rockers and have considered those but the only hangup for me is they are 1.72 rockers and I had my cam ground to use a 1.7 rocker. With a 1.72 rocker it adds .007" of lift on the intake and .005" of lift on the exhaust to my .621/.604 specs. Not sure if that would actually cause a problem though. They also use stock pedestals which won't fit in my trickflow heads so I would have to run prw pedestals or machine the OEM ones.
Thread Starter
Staging Lane
Joined: Mar 2024
Posts: 66
Likes: 15
Do your PRC's have bronze guides, that's my worry that the geometry may be different than the YT's causing premature guide wear. Also do they fit under the stock valve covers? I do like the idea of a steel roller rocker over an aluminum rocker, in my mind that would be stronger. Have you had any issues with valve float with the heavier rocker?
TECH Resident
Joined: Jun 2013
Posts: 814
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From: Nebraska, The Good Life
Comp Pro Magnums are a great steel roller rocker which has a pretty light weight on the nose. They are only available in 1.8 ratio though so you'd have to take that into account.
LS1Tech Sponsor
Joined: Sep 2004
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I am looking at options for roller rockers on my 408 ( I have tfs-215s with bronze guides so stocks are out of the question.) I’ve seen good things about the yella terra ultralites but they seem to be hard to get in the US without paying a premium. I’ve heard bad things about the Harland sharp’s like issues with breaking, I’ve read similar issues with about every roller rocker out there. I’m also worried about the extra weight causing valve float, that’s why I am leaning towards the YT’s as I’ve read they are relatively light and don’t cause issues in with valve float. Are there any roller rockers that are reliable and won’t break after 5k miles?
Whether its an LS1....LS3....LS7 they all have YT rockers and its not by accident (my personal hot rods as well)
They are the lightest most cost effective aftermarket rockers on the planet IMO and I have purchased over a thousand sets since the early 2000's when they were introduced
If there was something better for less money I would be recommending that but there isn't
I normally stock just about about everything in that line....shoot me an email or pick up the phone if you want more information
Regards,
Tony
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Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
Adjustable or non-adjustable? BTW valve springs are what keeps the valves in check not the rocker arms. Shaft mounted rocker arms provide more stability at high rpm and steel is stronger than aluminum. Jesel, Crower and T&D for the high end stuff. I have a set of TSP non adjustable steel rollers on my 370 build that has 823's with the factory guides and I'm pretty sure stock rocker arms work with bronze guides. Both the PRC LS7 and Brodix BR7 heads I have came with bronze guides and I was able to use LS7 rocker arms on them.
Thread Starter
Staging Lane
Joined: Mar 2024
Posts: 66
Likes: 15
Adjustable or non-adjustable? BTW valve springs are what keeps the valves in check not the rocker arms. Shaft mounted rocker arms provide more stability at high rpm and steel is stronger than aluminum. Jesel, Crower and T&D for the high end stuff. I have a set of TSP non adjustable steel rollers on my 370 build that has 823's with the factory guides and I'm pretty sure stock rocker arms work with bronze guides. Both the PRC LS7 and Brodix BR7 heads I have came with bronze guides and I was able to use LS7 rocker arms on them.
On The Tree
Joined: Jul 2011
Posts: 100
Likes: 17
I am looking at non-adjustable at the moment. I’m between the TSP steel roller rockers and the YT ultralights at the moment. Technically I could get away with stock rockers on these heads if the geometry was absolutely perfect but I probably won’t be able to get it that perfect and it would more than likely cause increased valve guide wear and the stock rocker pedestals won’t fit in these heads without some modification, so I’m sticking with a aftermarket roller rocker.
I agree here if it’s going to be a 100k mile daily driver type of hot rod. But for a weekend warrior build that gets beat on, the YT’s are great. 7 years on a set in my 434.