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I've always heard that the rocker roller tip slides instead of rolls. Here's a vid of a custom setup just for determining just such things. He's using a stroboscope to "slow down" the motion. I was always skeptical about the tip roller not moving at all, so it's good to see this.

http://www.network54.com/Forum/74182/thread/1247116730/SOHC+Valvetrain+Testing+-+Spinning+Rollers



He's also got a bunch of vids studying valve float. The main surprising thing (to me) was that it's basically just valve bounce instead of some sort of valve loft/coil bind. Maybe I simply didn't make the connection before. Here's his first valve float vids.

http://www.network54.com/Forum/74182/thread/1238772955/SOHC+Valvetrain+Testing+-+What+is+Valve+Float-



Here's the basics of the setup he started with.

http://www.network54.com/Forum/74182/thread/1238727989/Uncovering+the+Mysteries+of+the+SOHC+Valvetrain
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Ive seen someof his stuff before..It really is neat.
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2005 CTS-V LS6 M6 13.627@105.14 stock and hot/humid

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Posted By: 95ttoplt1 On: 09-16-2009 @ 20:18:41     Reply | Top | Edit

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i believe pac springs has some videos showing that stuff as well, pretty cool to see all slowed down
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Posted By: Sheridan On: 09-17-2009 @ 00:32:57     Reply | Top | Edit

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That is awesome!
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Now percocet free

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