Rocker Girdles ?
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Rocker Girdles ?

  1. #1
    ptc
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    Default Rocker Girdles ?

    Can someone explain the use of a girdle (for the laymen) is it just for keeping alignment of the valvetrain? and IF it would be a good idea on a .638 lift solid flat tappet doing 6500rpm? (496 BBC) Ive got the Crane golds, just wondering if its added protection for them? or?
    1975 Sanger True Flat - 496 BBC
    http://v-drivecalifornia.blogspot.com/

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    Default Yes.....

    Yes, yes, and yes.....

    Ray
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    Senior Member bp298's Avatar
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    are you asking about stud girdles???

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    Village Idiot fc-Pilot's Avatar
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    The purpose of the stud girdle (the girdle that sits over the rockers) is to strengthen the individual rocker studs by clamping all the studs together (by way of the extra tall poly locks) and therefore spreading the strength between all the studs. In doing so you are able to avoid stud breakage which is bound to happen with some of the aggressive cams out there these days. There is a chance you may break the poly lock (which I have seen) so it is not a perfect system, just better with it than without it.

    Paul

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    Super Moderator HammerDown's Avatar
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    I'm very happy with mine...and they were great to talk with too
    Added benefit > they do a great gob of deflecting oil from the valve cove breather
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    Default Valve covers...

    It should be mentioned they won't fit under stock, or short aftermarket valve covers....

    Ray
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    Village Idiot fc-Pilot's Avatar
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    Quote Originally Posted by Moneypit View Post
    It should be mentioned they won't fit under stock, or short aftermarket valve covers....

    Ray
    Yep!

    Paul

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    WEBSTER ,,,,, Scoggin Dickeys

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    ptc
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    Quote Originally Posted by fc-Pilot View Post
    The purpose of the stud girdle (the girdle that sits over the rockers) is to strengthen the individual rocker studs by clamping all the studs together (by way of the extra tall poly locks) and therefore spreading the strength between all the studs. In doing so you are able to avoid stud breakage which is bound to happen with some of the aggressive cams out there these days. There is a chance you may break the poly lock (which I have seen) so it is not a perfect system, just better with it than without it.

    Paul
    Thanks Paul for that explanation, makes perfect sense now. Has stud breakage been a problem even when using ARP rocker stud replacements or mostly just stock configurations?

    Any recommendations on which girdle to use for my application?; BBC, 990 heads, ARP studs, Crane gold rockers 1.7 and already have the tall covers....
    1975 Sanger True Flat - 496 BBC
    http://v-drivecalifornia.blogspot.com/

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    gn7
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    Flat tappets don't generally have stiff enough springs to cause stud failures. Stud flex is there, but not to the degree that is with a roller. RPM and the required springs to allow the RPM on a roller deal is hard on the studs. Look at the broken rocker thread. If you generating enough load to break a rocker, your generating more than enough load to flex the stud to the point of fatigue.

    A flat tappet spinning 6500 doesn't require a stud girdle, but they never hurt either.



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    ptc
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    Quote Originally Posted by gn7 View Post
    Flat tappets don't generally have stiff enough springs to cause stud failures. Stud flex is there, but not to the degree that is with a roller. RPM and the required springs to allow the RPM on a roller deal is hard on the studs. Look at the broken rocker thread. If you generating enough load to break a rocker, your generating more than enough load to flex the stud to the point of fatigue.

    A flat tappet spinning 6500 doesn't require a stud girdle, but they never hurt either.
    Thanks Bob, I was reading that thread and is where I figured I would check this out.... The girdle seems like it is good insurance, are any types good to use or are some better than others??? Comp Cams (shown)m AFR, Howard, DART=$$$ ???
    Last edited by ptc; 09-05-2012 at 02:47 PM.
    1975 Sanger True Flat - 496 BBC
    http://v-drivecalifornia.blogspot.com/

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    Pink Taco Reagan's Avatar
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    I added mine after busting a stud. Thanks to Jim at Cyclone Speed & Marine. My cam has 632 lift
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    Living in a cage of fear thatguy's Avatar
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    I haven't run anything with out stud girdles since the stock 427 in the purple flatty.
    On the Miller 454 with Brodix heads I have the Brodix girdle, on the Hydro with Chevy iron heads I bought the Webster setup.
    That Webster set is great
    Simple and works.
    Tommy
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