Guest zfan Posted June 28, 2000 Share Posted June 28, 2000 Anyone out there familiar with them. Just picked up a set to go on my performer rpm heads. Question how do you adjust them properly? Ive got a hydraulic cam/lifters. They have the nut with allen stud inside nut, is there a specific guideline to follow? Ive heard two different ways and am curious as to the RIGHTWAY ONLY!!! HELP!!! Quote Link to comment Share on other sites More sharing options...
Guest Fast Frog Posted June 29, 2000 Share Posted June 29, 2000 Zfan: I've been to the "farm" on this one. There are a variety of ways to set your preload for your hyd lifters. I've done it "wet" with the valve cover off and the engine running-real messy!! You can do it by etching a mark on your push rods then tighten your rocker nut down when you've measured .040-.060" of downward travel of the rod. Most instructions will tell you to finger tighten the nut until you can't turn the push rod in it's socket with your fingers then turn the nut one full turn and lock it down. After 5 or 6 episodes of trying to get it right and reduce valve train noise, I found the most effective and easiest way is the finger tighten/one full turn method. Now I've got a hyd roller cam and they tend to be more noisey than a non roller cam. If you don't have a set of instructions, it would be wise to contact the company or someone who does. Good luck!!!! Quote Link to comment Share on other sites More sharing options...
John Scott Posted June 29, 2000 Share Posted June 29, 2000 I also use the method suggested by Frog. Make sure your cam is on the base circle when you are adjusting. Adjust the intake when the exhaust is just opening. Adjust the exhaust when the intake just starts to close. Its easy to add preload with just finger tension on the nut so spin the push rod while you sneak up on the 0 lash. Yes you can still spin it with considerable preload so feel carefully. (especially if you haven't had the lifters "pumped up") When it just starts to "grab" the push rod, your there. You'll hear everything from 1/4 turn to a full turn. I'd stick to the 3/4 to 1 turn. Hold the nut in place with a wrench and tighten your setting with the allen/hex lock. Snug it up pretty good but don't over tighten. I set mine to 3/4 and good to 7000+rpm. Also, you have your guide plates and hardened pushrods? Non hardened will ruin quickly spreading metal pieces into the oil. Don't want to hurt those nice heads! JS Quote Link to comment Share on other sites More sharing options...
Guest RON JONES Posted June 29, 2000 Share Posted June 29, 2000 Frog is right,and John takes it one step further.The way these guys go about it is what I do with a hydraulic cam. Quote Link to comment Share on other sites More sharing options...
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