I've tried to do a search on these and didn't really see what I want to know.

I have a set of the old,non bushed, Comp steel rockerarms. I used them on my old solid roller cam at .648 lift with no problems at all. I don't remember what the spring pressure was though.

I'm wondering if I can still use these on my new solid roller at .680 lift and 715 lbs over the nose. I don't really want to buy new rockerarms.

They went to a bushed rocker because there were gaulding problems with the unbushed ones. There is no guarantee that you will be able to continue running your rocker arms without them failing but you can go ahead and try.

Unbushed rocker arms.

I use the older comps as well, I think you are asking alot at #715.

In addition to the issue mentioned above your way past open pressure for what they were made for as I think they were #500 or less.

Ive used them at #500 open and had a couple want to start to transfer metal with the comp shafts, and switched to a different shaft and have been ok.

I ran a Comp RX316-R8 cam and had two sets of those seize to the shaft. Comp said with that much cam and spring that the rocker bores needed to be honed for the shaft with a certain amount of clearance, can't remember what the number was. They sent me another set free of charge and I had them setup like Comp wanted at Mopar Engines West. They didn't last two races and seized on the shafts again! Went back to the Cranes until I bought some Harland Sharps that were on the car for 12 years before one finally gave up the ghost. Still have two sets of Cranes, 1.5 and 1.6 actually never had a problem with those but never ran them very long either.

Just an opinion....I think the rocker itself can handle the load, but the galling will likely be an issue. If you had them bushed, you might be okay. Gary at the new RAS (Rockers Unlimited?) would know.

How is the valve gear being oiled?

Hey guys, thanks for the replys.

I don't think i still have the Comp shafts that came with the rockers. I think I used some bannana groove rockers I had laying around that I was going to use on a different project.

Valve gear is being oiled throught the shafts with Indy S/R heads.

They worked fine on my old roller cam for a long time and a lot of passes at the track. Even took them up to 7k rpm's a few times. But....I did have really high oil pressure, like 90 pounds hot with the R's over about 1200. used Mobil 1 15w50 if that makes any difference.

They might live if you flood them with oil. You would need to rotate the cam bearing to shut off the oil from the mains and then drill a hole from the gallery over to the rocker feed passage. That will give you full time oiling to the rockers. Or use the Indy kit and pull oil from the gallery in the back of the engine and full time oil the shafts that way. You'll also want to hone them out for a little extra clearance. If they don't live with full time oiling and extra clearance then they probably aren't going to work out.

700lbs + ??

I wouldn't even try it.

OK.....It doesn't look like it's going to work without some sort of bushing.

Which brings me to another question. Do you think the Dovorak bushing kit and rocker shafts would work on my application ?

I was thinking about just enlarging the rocker shaft hole .060" and installing a .030" wall bronze bushing in them myself, but I've heard these arms are extremely difficult to machine after they've been heat treated. Anyone know anything about that ?

Comp used to say under 400 pounds open--you are way better off to sell them for a couple--buy the Mancini Harlands with no needles for a tad over $400 and rock on -- bushing those is not the best plan IMO-- At over 700 open Harlands are the ones that will live and give no problems, and there are others like Hughes but...the Mancini units do pretty darn good for the $$
I have had many Comps fail under all kinds of milder applications even after honing etc
Good Luck and FWIW rockers that have a groove around the inside spread the oil well and don't need oil mods on block in most cases--drilling your block and bushing those rockers seems like a long trip vs selling them and paying the diff for ones that will work

I'm sure I could probably sell them and maybe get a few hundred bucks for them. And the Mancini rockerarms are a good buy for the money, but they're still about 450 bucks a set and I'll need new pushrods too. The Comps use a different style adjuster and use ball end pushrods, and I like the pushrods I have now.

I already have full time oiling to the rocker shafts because of the Indy S/R heads external oiling deal.

I think the first thing I should try is bringing one of the rockerarms into work, and seeing how difficult it is to open them up for a bronze bushing. If they cut reasonably well I'll go that route.

Is Dan Dvorak even around anymore?

It might help to know what sort of open pressure that COMP says the newer versions of your rockers that have a bronze bushing already can handle.

From the Comp website.

Lifetime Warranty - So strong that we guarantee the rocker bodies against breakage for life. For use with up to 850 lbs of open spring pressure.

So I should be ok there.

That's for the newer 1621 rocker not the older 1321. I just broke a rocker and galled a shaft at a touch more spring pressure than you're looking at. Save your money now get new rockers and pushrods. You'll be on borrowed time however much labor and material you put into them. Good luck.