Has anyone tested these two trunnion kits side by side? I see there is a design difference with the oiling? Is there a reason to wait for the CHE to come back in stock? Is the CHE worth another $50?

 

Anybody?

 

I've seen some reports on other forums of the straub ones wearing prematurely. I installed the CHE ones last year and have been very happy with them. Also their customer service is great

 

I was worried about the bronze bushings wearing over time in either of those trunnion kits.

So, I replaced my stock LS3 rocker arms with a set of Comp Cams 1.8 ratio roller rocker arms. These have the needle bearings somewhat like the stock rocker arms, but they are held in with c-clips and cannot fall out like the stockers. Also, the 1.8 ratio will increase the cam lift on both the intake and exhaust lift .032". . I also like the idea that these 8650 chromoly steel rocker arms have full roller tips.

Increases stock LS3 Cam Lift . . . . From .551” / .525” . . . . To .583”/ .556”

They are a direct bolt-in replacement for the stock LS3 rocker arms.

Lifetime warranty ..


Attachment 48331316

 

As Turbo6TA said, I would go with a full roller rocker setup instead of either the CHE or Straub.

I also like the BTR shaft mount rocker system. I think Comp Cams also makes a similar system.

 

@Turbo6TA This is great information.

The full roller rocker setup is nice, but the stock LS3 rocker is pretty good. My concern, along with many others, is the needle bearing on the stock rockers. It is more of a preventative mod vs performance. In future, I may look at a 1.8 roller rocker.

As for the comp camps kit specifically.. maybe someone can provide more detail on the trunnion "upgrade". There website says - "As LS engines continue to grow in popularity, COMP Cams® has expanded its line of rocker arms to build components specific to LS applications. New Ultra Pro Magnum™ Rockers are made from investment-cast 8650 chromemoly steel, utilize upgraded trunnions and needle bearings over stock and are stronger, stiffer and more durable than the stock parts."

What makes this setup superior besides the retainer clip? Just curious.


Thanks

 

I just installed the CHE kit last weekend in my '12 GS that had a BTR stage 4 cam in place already. Car has 41K, with last 10K on the cam installation. Rockers looked perfect with no wear on the tips or at the pushrod, so I cleaned them, installed the CHE kit and reinstalled them in the car. I will say that the stock trunnions were secure when I pressed them out. However, I am glad that I will not worry about my high lift and the stock ones failing now. Cheap insurance and piece of mind. They do say to make sure the "C" clips face the correct way. One side is rounded and slightly smoother, that face goes to the inside of the rocker against the outer bushing. The directions state this, so I made sure that I assembled them that way.

I preferred the CHE due to the fact that they utilize 2 bushing surfaces, the trunnion itself and the outer bushing that just slip fits in the rocker. That made installation very fast as well with no need to press in the replacement trunnion. I just soaked all the parts in oil prior to assembly.
I would also say that CHE customer service is great. I ordered from them direct for the same price as anywhere else, and they were shipped the moment that their production ramped back up. I was told that they just set up a second machine for production and that along with the fact that they moved locations resulted in the production gap experienced earlier this year.

Good luck.

 

@Chi-Town Tom Thanks. I was able to order a CHE kit. Just waiting for more parts before I start the assembly.

 

Ive used multiple CHE kits... The first one I did was when you still had to send your rocker arms to them and have them installed.

Almost went with Straub in my C5 2 months ago, but found a CHE kit on ebay so stuck with what I know.

 

I forgot to add that I also purchased a LS rocker tool, 54702, (same number from different manufacturers). It made working with the rockers in a vice very easy.

 

[QUOTE=Turbo6TA;1603523286]I was worried about the bronze bushings wearing over time in either of those trunnion kits.

So, I replaced my stock LS3 rocker arms with a set of Comp Cams 1.8 ratio roller rocker arms. These have the needle bearings somewhat like the stock rocker arms, but they are held in with c-clips and cannot fall out like the stockers. Also, the 1.8 ratio will increase the cam lift on both the intake and exhaust lift .032". . I also like the idea that these 8650 chromoly steel rocker arms have full roller tips.

Increases stock LS3 Cam Lift . . . . From .551” / .525” . . . . To .583”/ .556”

They are a direct bolt-in replacement for the stock LS3 rocker arms.

Lifetime warranty ..




[

/QUOTE] They're held in place by snap rings, not c-clips. Just sayin

 

Bronze is a very tough, long wearing bearing material. If the bushings are made from Ampco 18, they'll outlast the owner! You should hear what sound it makes when trying to file it! When boring it, it screeches like a cat having its tail stepped on. Some mighty tough stuff. FWIW-I've also heard that valvetrain noise is significantly reduced when running the CHE compared to the needle bearing trunions........

 

I noticed my valvetrain got quieter

 

[QUOTE=grinder11;1603572042]The CHE's also use "C" clips.
I too noticed a reduction in valvetrain noise. Only hear the header noise under the car now.

 

[QUOTE=grinder11;1603572042]The CHE's also use snap rings. My error in my previous post.
I too noticed a reduction in valvetrain noise. Only hear the header noise under the car now.

 

[QUOTE=grinder11;1603572042]
I have these same rockers in my LS2 with a LS3 H/C/I build. Very glad I did so.

 

[QUOTE=Dave_in_VA;1603577668]Does Comp make these full roller LS3 type rockers for the LS7?

 

Unfortunately, Comp Cams does not manufacture these roller rocker arms for the LS7 ... and the LS3 rocker arms won't fit the LS7.

 

Are there power gains using higher ratio rocker arms? If so, what is the usual gain?

 

I think people usually see 10-15hp