[Fot] ROCKER ARM ASSEMBLY REBUILDER

[MadMarx]

I agree, not the best method and from my opinion to change the ratio is not
a precise thing to do and can cause forces to the components with disastrous
results.
What I have done is to reshape the contact point of the of the nose. The
difference is that with this profile on the nose I have a ratio change
during the valve lift.
The rest is done by the cam with 310 degree.

Cheers

-----Urspr|ngliche Nachricht-----
Von: Michael Porter [mailto:mdporter at dfn.com]
Gesendet: Mittwoch, 21. Januar 2009 16:12
An: MadMarx
Cc: 'FOT'
Betreff: Re: [Fot] ROCKER ARM ASSEMBLY REBUILDER


This will work, but, it's not the best method.  The rocker shaft and
valve positions are fixed.  For the optimum rocker nose contact with the
valve stem head, the distance between the rocker bore center and the
contact point of the nose should also remain fixed.  There's also the
additional problem of weakening the stock rocker by additional boring.


Ideally, the ratio should be increased by decreasing the bore center to
pushrod point, because that end of the rocker is made to operate with
some misalignment.  This could be accomplished by overdrilling,
rethreading and inserting a flanged, threaded plug, staking that, then
drilling and tapping for the necessary offset.  The same proviso about
weakening the rocker at a stress point still applies.



Cheers.

--


Michael Porter
Roswell, NM


Never let anyone drive you crazy when you know it's within walking
distance....