Rocker arm geometry
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Rocker arm geometry

  1. #1
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    Arrow Rocker arm geometry

    Should the rocker arm roll across the top of the valve stem or should it stay in the center of the valve stem and be as norrow as possible?.

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    steelcomp was here
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    Quote Originally Posted by Ken N View Post
    Should the rocker arm roll across the top of the valve stem or should it stay in the center of the valve stem and be as norrow as possible?.
    The sweep should be as narrow as possible. Do a search, this subject has been discussed in depth here.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Quote Originally Posted by steelcomp View Post
    The sweep should be as narrow as possible. Do a search, this subject has been discussed in depth here.
    Some guy made a good couple posts about this. Good info even has some good pics. Who was he again?
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Were was that Steel? Cant find it.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    here's a link to a recent thread about it-
    http://www.performanceboats.com//showthread.php?t=19770

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    OH NO! miller's web site is gone! Anybody have that on a down load? Steelcomp? .....Never fear, Steel would love to walk you thru the whole thing, he gets off on that sorta stuff Actually, search back a few weeks, Steelcomp did a really nice photo piece that explains it very nicely.



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    Quote Originally Posted by 71hallett View Post
    Were was that Steel? Cant find it.
    http://www.performanceboats.com//showthread.php?t=17545
    right here, again Steelcomp, super job, this should be a sticky in the tech links at the top of the page!



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    www.highflowdynamics.com LakesOnly's Avatar
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    Quote Originally Posted by gn7 View Post
    OH NO! miller's web site is gone! Anybody have that on a down load?
    Jim Miller and I speak regularly, several times a week.

    Miller is revising the website and business. Miller Engineering, or MEI, will become Miller Products Group, or MPG (already has), and the new website will ensue and of course will include all the important vavle train info.

    For decades Jim has offered priceless information for free, and which is based on his extensive research and development on valve train systems and rocker arm geometry. The new website will advertise all the Miller products; the info portion of the website will be subscription-based.

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

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    Distinguished Member David 519's Avatar
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    There's variations on the theme, but I like steel's version. Pics are in this thread...


    http://www.performanceboats.com//showthread.php?t=17545

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    Quote Originally Posted by gn7 View Post
    http://www.performanceboats.com//showthread.php?t=17545
    right here, again Steelcomp, super job, this should be a sticky in the tech links at the top of the page!
    Yeah. but next time I'll know to clean my nails.
    If God is your co-pilot, change seats!
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    What's amazing to me is when you think about how critical cam design is in relation to degrees of cranksahft rotation, it's obvious how important it is to get the rocker geometry right. Being off on the PR lengths (under or over arcing the rocker) can cost many degrees of rotation of the crank. The cam is designed to open and close the valve in specific relation to these degrees of crank rotation. If your P/R length is off, then your rocker geometry is off, your cam is off, and if you have a custom grind, you might as well have thrown the $$ out the window 'cause it isn't doing what it's supposed to.
    If God is your co-pilot, change seats!
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    Quote Originally Posted by LakesOnly View Post
    Jim Miller and I speak regularly, several times a week.

    Miller is revising the website and business. Miller Engineering, or MEI, will become Miller Products Group, or MPG (already has), and the new website will ensue and of course will include all the important vavle train info.

    For decades Jim has offered priceless information for free, and which is based on his extensive research and development on valve train systems and rocker arm geometry. The new website will advertise all the Miller products; the info portion of the website will be subscription-based.

    LO
    Paul, I was told he went to work for Randy at Harland Sharp.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Quote Originally Posted by cstraub View Post
    Paul, I was told he went to work for Randy at Harland Sharp.
    Wow Straub, you are really in the know that was to remain top secret info for some time.

    Not sure how much I can elaborate on this....yes, Miller Products Group (MPG) and Harland Sharp (HS) were in negotiations to combine forces. In short, I believe Mr. Sharp senior wants to pass the biz to his kids, and (if I got this right) his kids like the Mid-Lift technology and wanted to license it from MPG. I think that MPG was to license the technology and also Jim would come on as a consultant. HS was going to revise their rocker arm line with the technology; HS would remain an entity unto itself and sell its rockers; MPG would remain an entity unto itself and sell their rockers; and there might have even been the birth of a new line of new rocker arms (Miller-Sharp? ). This may or may not come to fruition and although I cannot say for sure I now suspect now that MPG just might blaze their own path as will HS.

    Chris, please call for any further details on this particular matter.

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

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