Che70velle

iTrader: (6)

I didn’t realize that the pressurized oiling was required. I thought I’d read it was optional.

Johnny_M

yes it optional. They won't last long without it though.

Johnny_M

CHE kit with roller tip rockers. You have over .600 lift. The stock rockers lock up according to Kenny Duttweiller.

tech@WS6store

iTrader: (2)

The comp shaft stock style rockers may "handle" up to .700 lift but they will still side load the valve and can cause improper wear.

The stock rockers dont lock up though. Thats somewhat an improper way to put it. Its an arc'd pad. If it were flat that could be an idea, but the only real issue for other wear is from an untrue pad or untrue alignment from the rocker bolt boss in the head, the rocker rail itself, or the rocker assy then the tip. OR the valve itself. Guide tilt etc. You can blame it on so much it becomes a "rabbit hole" issue.

ramairetransam

iTrader: (18)

off topic , what roller rockers then that wont cost a fortune .

Johnny_M

TSP has 1.7 for $549 , Comp Ultra pro magnum in 1.8 only for $349

Omega Doom

iTrader: (2)

I ran a RPM cam 238/244 612/588 lift for 10 years with NO trunnion upgrade with NO issues

JimMueller

iTrader: (9)

Hmm, I installed rockers in this link, with the LS3 CHE options, back in April. I've put maybe put 4000 daily driver miles on the engine since then; .how soon/often do I need to check for wear? If I was nervous about them and switched to another rocker arm style (or back to my original rocker arms that I have in storage), then I think I may have a separate issue. I have the Johnson axle-oiling lifters, so would I potentially need different length pushrods if I changed lifters? It seems I've read that you don't even want to move existing rocker arms to different valves as it'll throw off the preload.

https://www.texas-speed.com/p-1088-t...m-package.aspx

Johnny_M

Cut your oil filter open when you change the oil. You'll see the bronze man glitter in the the filter element when they start to wear.

bigsapper

Any thoughts on these?
Summit Racing® Pro LS Upgraded Rocker Arms SUM-141556

sjsingle1

iTrader: (1)

ok......comp trunion upgrade bad......bronze is glitter in your oil.........WTF is the best option !!!!

Johnny_M

If you are under .600 lift I would go with the ws6 store / rpm speed max effort rockers. Over .600 I would go with steel roller tip rockers. That's my prior experience. Opinions may differ.

sjsingle1

iTrader: (1)

did yella terra ever fix the breakage problem ? any other roller tip options ?

wannafbody

iTrader: (2)

I've read that roller tips are more unstable than stock rockers.

tech@WS6store

iTrader: (2)

Any alum rocker is going to not only be heavier but also have a much shorter fatigue life vs steel and can still have deflection. Picture an adult sized playdough fun factory and thats how they make alum rocker arms. So any flaw in the material or process etc will show up in an entire batch BUT wont just show up only in one set as they are made in huge batches.
I cannot attest to how the comp cams rockers are made but the tsp are investment cast just like stock with some obvious strengthening of the areas for the tip etc.
They do require a shorter pushrod, which is good. They arent nearly as bulky as most other alum rocker and normally dont require any spacers or super thick gasket etc.
I haven't installed a set of the new comp cams sets so i cannot say anything there.

As far as the other guy changing from a johnson to a reg lifter you would need different pushrods. Likely .025 longer but i dont like to measure pushrods on paper. Its always best to measure on the engine.

Also, make sure you have the right spring for a roller rocker. Some have good pressure but might not be as stable with more weight on them due to design or material and dont recommend roller rockers with them. Always ask your spring provider there.

Johnny_M

Steve, Dave and Dulcich did an episode on engine masters on roller tip rockers. I would disagree with what you've read after watching the dyno results.

dreadpirateroberts

iTrader: (1)

I was wondering what he meant when he kept saying "locked up."

What part of the rocker is he talking about?

The only lift limitation to the stock rocker arms i knew of previous to this was the shape of the tip, and as it went over a certian valve lift that it would no longer be centered on the tip of the valve stem. Thus, side loading the valve slightly. People still run them this way, though, so...

dreadpirateroberts

iTrader: (1)

That brinelling wear is from constant repetitive motion over the same spot, exacerbated from lack of lubrication. Like what you would see in a worn out u-joint.

You never said what this guy meant when he said "locking up" over .600 or .630 lift. WTF does that even mean?

dreadpirateroberts

iTrader: (1)

They wear as soon as you start using them. By design. The only thing this thread and others show is that such wear takes place over a much shorter period of time than advertised.

i would think any application that uses higher than the stock spring pressure and an aggressive cam lobe is going to put more stress on the rocker trunnion, regardless of the design of the trunnion.

LilJayV10

iTrader: (39)

It really depends on who the favorite is this week on LStech. Next week it will be different.