Do the factory ls3 rocker arms still have the same issues with spitting bearings as the ls1s? Do I need to do the trunion upgrade or just get roller rockers?

 

well it would seem half of them are the same so i would think it be best for a high rpm motor. i bought and am using some harland sharp trunion upgraded ones.

 

You make a good point

 

FWIW: I've been running YT rockers for the past 6 years and have broken 2 of them from 2 different sets. I've lost confidence in them and I just ordered a set of CHE bushed rockers from Richard at WCCH -proheads.com.

http://proheads.com/products.html#cherocker

 

I am also ordering the CHE bushed rockers upgrade. Sending the rockers out tomorrow!

 

Wouldnt it be better to get some roller yella Terra's if I'm going to spend that much for CHE bushed?

 

Maybe you should do some research on Yella Terra's and hope you get a good set...

 

Will do thanks.....anyone tried the summit trunion upgrade?

 

I'm assuming that would be the Comp trunion kit from Summit? If so, somebody just last week posted pics of a few of those getting chewed up on multiple sets. Pretty gnarly stuff.

 

No Summit makes there own style of the upgrade.^^

 

Looks like its bushed or gamble...

 

where the heck do you find the pricing?

 

Email Richard @ WCCH for pricing. CHE is right next door to WCCH and Richard does business hand in hand with them. It is $420 + shipping if you supply the rockers. $640 + shipping to buy outright I believe.

 

Isn't that alot of money for a non-roller type rocker.

I think it was me that posted about breaking the trunnions, and I think what we decided was that they were just worn out after working for 44k miles.

Why wouldnt u get rollers? They take alot of lateral strain of the valve stems, right?

 

Because a quality shaft roller rocker setup for LS7 heads is $1500 (Jesel, Crower, Crane) and then add on the machine work to mill the rocker pedestals down. Who knows if the valve covers would fit either so that's a gamble as well.

44k miles is no excuse for trunnions to fail. GM did not intend for them to last for that little of service life. The problem lies within the design itself.

The Comp Cams trunnions have had quite a few failures very recently as well. Not chancing my motor on there product.

So that brings me to this. Either buy the shaft mounted roller rockers for $1500 and do all the machine work and valve covers and I'm at around $1900-2000. Or I can reuse the factory castings of the rockers I have and use a bulletproof bushing from CHE for $420 and never have to worry about spitting the needle bearings through the motor. Richard @ WCCH has never had a single failure with the CHE rockers. Is it a lot of money for a non-roller style rocker, yes, but is it worth it to me, YES.

 

Truth, but also, when GM designed the car, they were using a stock cam. We are supposed to replace the valve springs often, too. So yes, the stock/comp trunnions would be expected to last longer on a stock cam, but on an aftermarket cam?

 

Exactly! Mine were shipped yesterday..

 

 

Richard said he's expecting mine back to his shop on Friday or so.

 

With the YT's breaking in my build and the reports of the trunion upgrades coming apart, I think these are a great option for up to about .650 lift.