Just looking for feedback on these jewels. . . They claim they fit under the stock valve covers with no mods. The CC PN is: 5054170 and I found them online for just under $800; which seems reasonable for a shaft system.

TIA!

 

I looked at these but have read they require quite a bit of head grinding, spacers, and other modifications to make them fit so I wrote them off. I am looking at the Cranes now, they have been getting a lot of good press lately on some of the forums and have been solid.

 

Yeah, I'm eyeing the Crane Gold setup too; PN 144750-16 w/ studs and guideplates going for $699.95 from Summit. I put about 80K miles on a set of Crane Gold self-aligning versions on my '94 T/A with no issues.

That price motivated me to start looking at the shaft systems, all of which are going for $1K+; except for the CC system I mention above that I found for about $775. Its not good to hear about the grinding required! Talk about blatant false advertising!

 

you can get that same rocker kit from vinci for $669.00 http://www.vincihighperformance.com/superwebdeals.HTML

 

Cool, thanks for the info!

 

Comp says they will fit under the stock valve covers but I've heard from someone who installed them and said that they won't.

 

Are you gonig solid roller? The rockers on the ls1 are pretty darn good unless you go the roller route.
Based on my experience with Jesel setup, you will need some light machining, nothing major at all. The valve covers need a lil work as well or use a spacer.
If I was planning on spinning my motor up there I would trust nothing but the best and the best is Jesel Non adjustable are the SS and the top of the line are the J2K's and Mohawks.

 

I would buy from Vinci rather than Summit myself. Vinci at least supports the Vette/F-body hobby. Also, check out LS1tech.com there is some information on them over there as well.

 

One more to throw in the mix. the yella terra from australia, there is an US distributor, price is around $500 Here is an article covering the complete install with many more pics http://www.ls1howto.com/index.php?article=21

 

Thanks guys for the replies!

Do the Yella Terra's come with mounting studs? Or are you suppossed to use the stock studs?

I'm leaning towards Crane's solution with studs, guideplates and pushrods since the new 5.3L heads I have didn't come with studs and I'll need pushrods too. I'm just not sure if they'll be the correct length until I bolt everything on with the head gasket thickness selected based on the quench.

 

i put 4.8 heads on the wife's car with .042" thick mr gasket head gaskets. still used the 7.250 pushrods that come in the kit. hope that helps.

 

Just some information on the comp cams LS1 shaft mount rockers.
1) They do NOT fit under the stock rockers; unless you gut the baffles and dimple the covers.
2) Due to the change in rocker geometry, the pushrod galleries require elongation; which means removal of the heads.

CompCams has flat out lied about these rocker arms. They are not even manufactured by Comp, but by DRL. The DRL rockers are a high quality piece; however due to the misinformation provided by Comp people have given the rockers a bad rap. Comp has since changed their shaft mount rocker manufacturer to T&D which is also a high quality piece, in hopes that people will forget about their false advertising about the DRL's.

Bottom line: CompCams sucks!!!

They did not provide any assistance to any of the individuals who purchased the DRL shaft mounts based on the false advertising (one of those customers was me).

As I said before both shaft mount systems distributed by Comp are high quality pieces as long as you know what you're getting into.
But I would alleviate comp altogether and go to a ditributor that will give you proper information; such as Thunder Racing or other forum based vendors.

As others have stated, the Cranes are a true bolt in with no headaches, and are also high quality.
I would stray away from the YellaTerras, as I have heard about a few failures as of late.

Just my .02

 

I've been testing a set of Crane 1.8 "Quick-Lift" rocker arms for them and I have to say that they've been outstanding. I swapped out a set of SLP 1.85 rockers for these and even though my max lift decreased a bit, I made the same power, but made it several hundred rpm sooner than the SLPs did!

I also got a set of Crane valve springs, but winter hit here before I got to install them. With the addition of these I expect to pick up even more power as the Crane rocker arms and my present PRC springs don't really like each other much and I got a small dip in my dyno graph near redline because of harmonics/incompatibility. I expect to pick up additional hp once this situation is corrected.

 

you can alleviate yourself of headaches and quality issues by just going with the BEST rockers, Jesel. THe SS series are cheaper than the comps and the J2K or Mohawks are a must for roller setups. Yella Terra's have had problems. Get opinions over at Ls1tech on YT, comp and Jesel.

Jesel also has GREAT technical supprt and documentation.

Jesel

 

The above is true to a point, C/C sold the DRLs based on information from the supplier they no longer sell the DRLs C/C pn 5054170. They have replaced the supplier with T&D. The adjustable DRLs, T&Ds, and Jessel's require modifcations. They are all great products if you base them on price then the Jessel is indeed the best since they are considerably more than the other two. I believe the T&Ds are the current rockers in the C5R