Lifter Preload
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,475
Likes: 565
From: Clearwater Florida
Lifter Preload
........... Do changes in lifter preload effectively change pushrod length as seen at the rocker tip / valve stem ?? ......... As a for instance ... if I change from the factory recommended one full turn down ( approx .060" preload ) to one quarter turn down ( approx .015" preload ) ... have I lengthened the pushrod by .045" at the rocker ?? ...............
Last edited by C409; Dec 25, 2010 at 08:52 AM.
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,475
Likes: 565
From: Clearwater Florida
............. HUH ? ................. I'm just referring to rocker adjustment and its dynamic "effect" on pushrod length ........... there's no change in lift or duration ... and , the amount of preload should have no bearing on the amount of noise ... at least as long as there is SOME preload .......
Drifting
Joined: Mar 2009
Posts: 1,253
Likes: 4
From: East Wenatchee (2hours from n e where) WA
assuming that you are running stud rockers not shaft; As you turn the rocker adjusting nut tighter to sink the plunger into the lifter the rocker fulcrum is moving as well, changing the geometry.
