Rockwell Joint to my Crank/Flywheel
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Rockwell Joint to my Crank/Flywheel

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    Senior Member pilot940's Avatar
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    Default Rockwell Joint to my Crank/Flywheel



    When I last mounted my rockwell joint there was an 1/8" gap between the flywheel and the joint. This gap was caused by the crank extending out beyond the flywheel. (Olds 455) I ran it with the washers in the picture and it seemed ok, but I don't like it. Is there something I am missing here? Should I have a spacer sandwiched in between?

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by pilot940 View Post


    When I last mounted my rockwell joint there was an 1/8" gap between the flywheel and the joint. This gap was caused by the crank extending out beyond the flywheel. (Olds 455) I ran it with the washers in the picture and it seemed ok, but I don't like it. Is there something I am missing here? Should I have a spacer sandwiched in between?

    That "Rocky" has a crank locator and is for a "heavy flywheel" you need a Rockwell with a machined register that will allow the pto flange to register over the small protrusion of the crank 99% of Olds applications were produced with flywheels (not flex plates) you could also knock the center "plug out" and have the face of the D/L flange machined (recesssed) for this . you could also fabricate a spacer to take up the difference (sort of like the prior "washer" fix) IF the engine is standard balance one of the simplest fixes would be to loose the flex plate and pickup a flywheel Call if we can help Tom

    heres some web site info I hope you'll find usefull :
    http://www.jetboatperformance.com/in...elineeducation

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    Tom is rite on the fixes u can do to solve ur prob...there is a spacer that someone makes for a flex plate that will make up for the thickness of the washers ur now useing...i have seen them, but dont remember who or where makes it...its sorta like a stiffner for the plate, about 1/4" thick...u might try Summitt, Jegs or Chevy, Ford, Olds, Chry etc parts dept...just my .02 cents...good luck

    FastRat

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    Boat Nut sleekcrafter's Avatar
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    They used to offer PTO spacers, for use when switching to flex plates, from fly wheels. I have a spacer for a BBC, it's about 3/16 - 1/4" thick, sitting on the shelf.

    I think it's available from REX pn 242 207 Chevy Flexplate spacer
    Last edited by sleekcrafter; 11-24-2009 at 05:52 PM.
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    Senior Member jetboatperformance's Avatar
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    Just found this if you still need it !
    just what the doctor ordered

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    NW Spectraholic Malcolm's Avatar
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    I made a spacer out of an old crank flange and it has been working fine. I never really noticed any difference going to the flexplate tho, the Olds has so much torque it revs up just as quick with the heavy flywheel.

    Malcolm

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    Boat Nut sleekcrafter's Avatar
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    It's an easy way to shed 40 LBS. and it won't come back
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    there ya go pilot 940...3 fixes...Tom, Sleek & Malcom...prob solved!...i knew they made a spacer/stiffner ...way to go guys

    FastRat

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    Senior Member pilot940's Avatar
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    Quote Originally Posted by jetboatperformance View Post
    Just found this if you still need it !
    just what the doctor ordered
    Thanks everyone for all your help appreciate it!!


    Tom,
    Go ahead and send that spacer with my energizer kit for my jacuzzi, just add it to my total.
    Thanks,
    Corey B.
    Any questions give me a call!

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by pilot940 View Post
    Thanks everyone for all your help appreciate it!!


    Tom,
    Go ahead and send that spacer with my energizer kit for my jacuzzi, just add it to my total.
    Thanks,
    Corey B.
    Any questions give me a call!
    Corey its on its way , Pumps done today headed for Shipping !

  13. #11
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by jetboatperformance View Post
    Corey its on its way , Pumps done today headed for Shipping !
    howabout tom's ls pto?

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by IMPATIENT 1 View Post
    howabout tom's ls pto?
    Damn Son alls ya gotta do is say yeah to pull the trigger Bro !

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