fsuforever

When I say high hp,I mean 600 to 1,000rwhp,I have a set on my c5 & look to keep them on ,also my cars @ a dyno shop waiting for paxton to complete the rebuild on the novi 2k,cars an auto should make somewhere between 7 & 800 rwhp

jcb5565

I have been using the LS6 rockers on my blown 383 without any problems. It has over 750 hp.

0Chris@HPS

On my old TT Camaro making over 900rwhp, I used stock LS Rockers. Worked great without any issues.



Chris

vettenuts

Not sure what relevance hp has with the rockers. Either you have the geometry or you don't.

jobberone

HP is irrelevant. What matters is how high you are going to rev. I'd limit stock rockers to 6600 rpm. You are probably ok to 6800.

099blancoss

Rebuild the stock rockers and they are good to go.
We offer it for $199 or you can buy the kit for $114-$134 and do it yourself.

fsuforever

The reason I said high hp is because most /not all, but the majority of high hp cars put on aftermarket rockers,Not stock Ls1 /Ls6 rockers,so there's your relevance/I am totally aware. Of geometry on the Ls motor ,your pushrod length plays a vital role in the correct geomtery,I asked the question in reference to the needle bearings taking the revs comapred to a yella or any other aftermarket rocker for that matter/the Ls motor is hands down 1 of, if not the easiset to set up rockers

vettenuts

On the LS family of motors, pushrod length on a stock rocker or any similarly installed aftermarket rocker play no role in geometry. Pushrod length is only used to set lifter preload.

TT Z06

Running stock rockers to 8k over 900 hp

I am however switching out to Jesels

lucky131969

The needle bearing issue is old news, and has since been corrected in the lastest design. If you buy a new rocker at the dealer for the LS1/6, it will incorporate the improved design, to captivate the bearings.

099blancoss

^^ I dont know ? I just rebuilt some new LS3 ones (brand new off the shelf from SDPC) and they looked the same to me. The bearings are trapped together by the caps. They cam apart the same way ?

madmatt9471

I like this thread and the fact that they offer rebuild kits

Unfortunetaly on aftermarket heads like mine - TFS or AFR heads you need to run aftermarket RR's due to geometry - I talked directly to TFS and I now know why

Thanks,Matt

fsuforever

So what u just said is if I go out & buy a 7.35 puhrod & I need a 7.4,this won't thow off the geomtry ,I totally disagree & it has everything to do with the geomentry,yes it plays a role in preload for lifters ,its not like I have to shim them,its 22ftlbs with a pushrodlength checker,so ur gonna go buy a set of pushrods. & u would be guessing @ it ,if u didn't measure the length with a pushrodlength checkerur in the dark guessing @ it!! if they are to long or to short then u just said that's ok run them U CANNOT GUESS @ UR LEngth U will have a screwed up wipe,we don't guess @ stuff like this in the south & we do get the correct geometry/btw I am running a stock Ls6 rocker & an aftermarket cam /Lq9 ironblock that required me to shorten the length of my pushrod to a 7.35,not the 7.4 ,also I know several guys running stock blocks that run 7.1 pushrods,there cam lobe plays a role in this as well as spring height/this also goes back to the original question about the revs on the needle bearings & if there up for the task with 16lbs of boost @high rpms

vettenuts

Pushrod length will not effect wipe, please explain how you think this happens. The pivot point is fixed and the pushrod will not change the location of the pivot point no matter what length you install. The only thing that the pushrod will do is effect the plunger depth until either you run out of plunger depth (too long) or there is no preload (too short).

As for you other question, GM upgraded the bearings later in the production run so you can either go with new stock (don't have the part number) or press in the Comp bearings.

fsuforever

So ur saying gm upgraded the needle bearings?,well that's cool ,I did not know that,I was just concerned about the Ls6 rockers seeing the high revs & lasting that's the only reason I posted this ,I have z06 rockers off of an 02 ,they have 50k on them, what I'm saying about the length of rod is that u just can't assume ,its not a 1 size fits all deal,if ur short on pushrod where is ur rocker gonna be sitting ? In the middle of the valve ?I highly doubt it so ya the lenght of the rod doess play a rolei,If u go shave 50 thousands of your heads do u think ur gonna have the same geomtry u did before u shaved the head? No ur gonna have to get the correct length rod! U cannot put the stock rod back in the hole after shaving the heads 50,60,70, thousands,it just ain't gonna happen, if u don't have the right length pushrod ur gonna have issues with it,which u can agree or not,which is perfectly fine with me ,I won't lose sleep over it trust me!

099blancoss

I just pressed a set apart, I didnt see any difference.

fsuforever

So based on the 01-04 bearings the newer. Rockers were suppose to be an upgrade,maybe they just added more needle beaarings to it,did u count them?its all good ,just wanted to see how many guys are having sucsess with using the stockers

lucky131969

There is a thread covering this. EricD, who is a GM engineer, posted pics of the old and new design.

vettenuts

Yes you will because shaving the heads doesn't reposition the rocker stand but it does make the rocker closer to the lifter, where a shorter pushrod would then be used to adjust the difference if its required. There are two ways to change the geometry, one is to raise and lower the rocker and two is to change the total lift. That's why when you installed a cam with more lift you need to adjust geometry.

099blancoss

Got a link?