zstripper2k

Engine is a stock LS1 w/ 68k miles.

Looking into a Lunati 60516 camshaft with following specs:

625 i/e Lift
219/222 on duration

Am I ok to stay with stock rockers or do I need to upgrade to rollers, and if upgrade is needed, this is the direction I am looking towards.

I have looked into the 2 following manufacturers for replacement:

1) Harland Sharp non-adjustable
2) Scorpion non-adjustable

Both are priced the same but didn't know if one was superior to the other. Also if they are going to run into interference w/double valve springs.

I saw there are adjustable versions of these rockers but was not sure if I need that option in my application since there is a $200 price difference.
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6point0 goat

iTrader: (2)

Ill be running the my stock GM rockers on a .651 lift cam, just do the comp trunions upgrade and you should be fine.

JPH

iTrader: (2)

When you get into "aftermarket" heads is when stock rockers and high lift cams can become an issue. You will be fine. An upgrade of the trunion would be a great addition, but valve spring selection will be more important with the kind of lift you want to run.

260B4U

iTrader: (4)

i agree trunion upgrade i would go with the hs trunion upgrade

soundengineer

iTrader: (16)

Stock Rockers...With Trunion Upgrade
.649/.646 Lift on my cam
Manley 221435 Valve Springs good to .700

Damian

iTrader: (89)

Both sets of rockers you mentioned have a horrible reputation on these engines. Do some research.

Stock rockers are fine.

soundengineer

iTrader: (16)

IF you were going to do any aftermarket rocker.. it would have to be some High Dollar Adjustable Jesel's... its the only thing better than stock...and its a lot more expensive than stock with a Trunion upgrade..

you can get the Trunion upgrade from comp an press them in yourself
or you can send your stock rockers to one of many vendors on here that do the service..
most of them will allow you to buy the upgraded rockers, and send in your stockers when swapped for a core charge return.

sepsis

iTrader: (7)

Which rockers have a good reputation? other than stock.

zstripper2k

Thanks for the clarification. Someone had mentioned to me the trunion upgrade but thought that was just to fix the common problem with the needle bearings coming out.

Reason I started this thread was I read in what I remember to be a Hotrod magizine article sometime last year and it stated the stock LS rockers were good to .550 lift but after that the sweeping motion on the valve end would get larger the higher the lift and could wear out valve guides prematurely. Thats why I posted here since I knew the experts here could shed some light on this.

soundengineer

iTrader: (16)

like $1200 for a set

Damian

iTrader: (89)

None that I've experienced.

-Yella Terra's break
-H. Sharps cause stability issues
-Scorpion do all of the above.

Stock rockers are fine, even on an aftermarket casting.

A.R. Shale Targa

iTrader: (2)

Why hasn't Crower brought they're stainless rocker to the LS world yet ???
They are light @ the valve and last forever on high rpm roundy round engines.

sepsis

iTrader: (7)

Who knows.

They do make aluminum shaft mounted ones though.

jimbob

iTrader: (4)

I have Mast LS7 Crower stainless on my combo. I just put them on a few days back, so I can't yet tell you how they work. Even with the raised valve cover area that these heads have, I will need to run 1/2 inch spacers for the stock valve covers to be used (like the stock look). For reference, I had stock LS7 rockers with comp trunion upgrades. With the spring pressures I run and the cam accel rates, I heat checked 4 of my intake rocker arms (only 4 which itself is weird) on the dyno. So, in my case this wil fix a problem, and man the swipe pattern sure is pretty with this set up

They may have these for LS1 heads but you would need the stock rockers pedestals machined off...

SweetS10V8

iTrader: (4)

I ran stockers w/ Comp trunion upgrades on .621" lift without problems. I agree with above, most aftermarket LS rockers are actually downgrades for various reasons.

Ive run T&D Shaft, SLP 1.85s, Comp 1.85 Pro mags, and Scorion rockers on various engines, All of which had at least some downfall, thats why I stuck to stock rockers!