hydraulic lifter problems

Well I have Comps. HE268 right now and it stops pulling at 5200-5400rpm's. I put adjustable rockers on in Sept. and now its good to 5500rpm's. All I know is my next cam is going to be soild. Comp. told me the [email protected] would be just like my HE268 at idle but rev. higher, can't wait for spring. I would say 6100rpms with a hydraulic is not bad. What type of oil are you running? Call Comps and tell them the type of oil and maybe they could tell you what might be better. Problem with stronger springs is cam wear. One more thing could be your valves sticking, remember theres no lead in this gas today, I hear some trans. oil in the gas helps sometimes