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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » self aligning roller rockers Vs roller rockers that need guide plate?

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    1/06/2023 6:36 PM  #1

    Daze
    Forum Moderator & Bash host 2011

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    From: Kalispell MT
    Registered: 1/24/2013
    Posts: 1,130

    self aligning roller rockers Vs roller rockers that need guide plate?

    It is my understanding that for a lower RPM application say less than 6000 that the less expensive self aligning roller rockers are a good option.  My head comes with guide plates so I am setup to use the non aligning rockers but if the others will work for my application I would like to save a few $$ on the rockers + then I am not required to run hardened pushrods saving a few more $$.  What has been your experience with these two types of rockers.  Both are stud mount and both are full roller also I know that if I go with the self aligning rockers I need to remove my guide plates.

    If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     

    1/06/2023 8:13 PM  #2

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,245

    Re: self aligning roller rockers Vs roller rockers that need guide plate?

    My preference is always guideplates with hardened pushrods.

    You are required to have longer valve stems if using self-aligning rocker arms. Using guide-rail rockers on valves having the shorter stems designed for non guide-rail rockers can result in the guiderail rubbing on the valve retainer and that is BAD.

    Whatever your decision, check to be sure the guiderail rockers cannot touch the retainer at any point in its travel.

    Using stock heads with longer tips designed for rail rockers should not be an issue, but most aftermarket heads have the shorter tips.

    Note: Summit brand hardened rocker arms are good value.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    1/07/2023 8:05 AM  #3

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,490

    Re: self aligning roller rockers Vs roller rockers that need guide plate?

    First, always use a screw in stud or bolt regardless the type of rocker.  Two out of three rocker issues I've seen over the years were caused by pressed in studs popping out of the head.

    Second, I agree with MS.  All things being equal I'd much prefer being able to adjust the guide plates.  IME a two piece guide plate is a better option than a one piece (makes adjustment a lot easier).  The only real trick the guide plates is you need to make sure you have guide plate to pushrod clearance (usually 0.005" minimum). 
     

     

    1/07/2023 8:58 AM  #4

    red351
    I FYI 24-7

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    From: Carlisle, PA
    Registered: 5/31/2018
    Posts: 445

    Re: self aligning roller rockers Vs roller rockers that need guide plate?

    I use the self aligning on both clevelands and can't say I had any problems. I shim them with less preload for less valve float and have run the snot out of them both at our local 1/8 mile track years back. Many miles with smiles.

     

     

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