Comp Cams Ultra Pro Magnum rocker arm review
04-16-2015, 02:12 PM
#41
Obviously you didn't watch the video. At 6:30 in the video, he says "some of these click when you tighten them down, and these ones do." So either the scorpions you have are not the ones on this video, or you actually aren't getting your poly nut tight enough but think that you are.
So maybe you aren't "properly" adjusting them as you might think.
So maybe you aren't "properly" adjusting them as you might think.
We are just calling the same noise different names. Sorry for the confusion.
04-18-2015, 05:17 PM
#43
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That's what I'm asking. Is it just friction noise? Or is there a fail safe on some poly locks that causes it to click when it's tightened down?
It's the first time I had ever seen it (that youtube video) which is why I asked...
It's the first time I had ever seen it (that youtube video) which is why I asked...
04-18-2015, 05:26 PM
#44
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If you think I'm trusting your experience over Comp Cams instructions you are an even bigger idiot than I already know. Nothing personal. You have simply shown far too much ignorance in your knowledge base for me to ever trust you. Along with no willingness to learn or admit to when you are wrong. I think you just like to troll anyone who has sense enough to know when you are full of it and point it out.
Each lifter has a different amount of available travel in the pre load spring, and plenty of people use "rule of thumb" type stuff pertaining to valve adjustment. While a half turn is generally acceptable, that might completely max out certain lifters available travel, which could cause breakage.
Theoretically, you want to be just about in the middle of the lifter preload travel after a valve adjustment, and if you want to know exactly what that is, you'll need to measure it using the appropriate tool.
For me, my motors are just regular old 4, 5, 6 hundred horse type motors where having the "optimal" valve adjustment isn't as crucial as on a 10,000 rpm 2k horsepower motor....
04-18-2015, 05:30 PM
#45
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That being said, you can also figure out how many turns of the rocker locking nut are needed to get the desired pre load distance. Find out your lifters available travel, find zero lash, and turn the nut until you get about in the center of the pre load. On an Ls7 lifter, 3/4 turn seems to be money.
04-18-2015, 11:27 PM
#46
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He's actually right though.
Each lifter has a different amount of available travel in the pre load spring, and plenty of people use "rule of thumb" type stuff pertaining to valve adjustment. While a half turn is generally acceptable, that might completely max out certain lifters available travel, which could cause breakage.
Each lifter has a different amount of available travel in the pre load spring, and plenty of people use "rule of thumb" type stuff pertaining to valve adjustment. While a half turn is generally acceptable, that might completely max out certain lifters available travel, which could cause breakage.
Last edited by ACE1252; 04-18-2015 at 11:40 PM.
04-18-2015, 11:43 PM
#47
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I have been running scorpions myself, no problems with noise, but the car is loud enough couldn't hear them anyway. Have put several thousand miles on them plus several rounds down the strip with no problems, but I know other people that have broken a rocker here and there, probably defective if not caused by mechanical interference... will go to shaft system in a year or so
04-19-2015, 01:15 AM
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