In a message dated 11/13/00 5:43:38 PM Central Standard Time, 
glocke@ihug.co.nz writes:
> From what I understand, the rocker itself adds a little
>  extra improvement, but it's main advantage is to allow a cam to be used 
that
>  opens and shuts quicker, with the valve still being able to follow the
>  profile OK. 
Careful here...  Roller LIFTERS allow a more radical "ramp" on the cam, so 
the lifter doesn't "dig" into the cam, and the resulting valve opening time 
is a huge improvement.  Eric is talking about roller ROCKERS.  These reduce 
friction and side stresses on the valves/guides.
Gary
 
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