From: gln@worldpath.net (Nick Gemas) Date: Wed, Jul 9, 2003, 10:16pm
(PDT+3) To: 6pack@autox.team.net Subject: Re: Pushrods and Rocker
Pedestals
Dick,
< The problem I'm having is , I bought a set of
roller rockers and upon installing them I checked to see if they are
centered on the valve stem when run through a cycle and they are
centered at the beginning of a cycle then move about .070 " out away
from the rocker shaft. I'm trying to get the contact patch of the roller
tip perfectly centered on the valve stem...>
Nick---The area where the rocker pads, or rollers in your case, make
contact with the valve stem must go thru an arc when opening the valves.
The more the valves open, the larger the arc. There is some geometry
involved here that requires that the pedestals be at a certain height
before such movement takes place, so as to lessen the amount of
off-centering and side load placed on the valve stems and their guides.
(Rollers at the rocker ends would reduce the frictional wipe, of course)
At this point I will defer to those whose business it is to supply a
more fitting solution.
Dick
/// 6pack@autox.team.net mailing list
/// or try http://www.team.net/cgi-bin/majorcool
/// Archives at http://www.team.net/archive
|