Measuring Pushrod Lenth

Engine, Trans & Driveline

  1. khryslerkid

    khryslerkid FBBO Gold Member FBBO Gold Member

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    Did my measuring for pushrod lenth and came up with 9.00, outside of cup to end of ball end.
    Summit has one that measures 9.030. That should work just fine. So I receive them today and they measure 9.200 from outside of cup to end of the ball.
    Too long!
    So I guess Comp Cam measures to the inside of the cup? Everywhere I've looked they want the measurement to the total outside. What's what?
     

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  2. Hemirunner

    Hemirunner Well-Known Member

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    Summit lists them as overall length but comp lists them as effective length. They are 9.030 effective and 9.200 overall. Call smith brothers pushrods and order them however you need, just be sure to tell them whether the measuement you give them is overall or effective length.
     
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    • khryslerkid

      khryslerkid FBBO Gold Member FBBO Gold Member

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      Figures, Summit even states overall lenth in the add...

      Back to the drawing board. What happen to throwing these engines together with what we had laying around!
       
    • 62 Dart Convertible

      62 Dart Convertible Well-Known Member

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      Mate, the ball end is spot welded in to the pushrod tube, but the cup end is just a light press fit (the summit page states that too). Easily removed, then pushrods best shortened in a lathe with a parting tool. If you can't do it, any machine shop can... I did all mine in under an hour.
       
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      • khryslerkid

        khryslerkid FBBO Gold Member FBBO Gold Member

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        A year ago I had access to a machine shop but now I work somewhere else doing QA. Might contact a former co worker!
         
      • texas69bee

        texas69bee Well-Known Member

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        As stated above, Smith Brothers. Easy people to work with.
         
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        • Shorthorse

          Shorthorse Well-Known Member

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          You also need to consider the wall thickness which is determined by your spring pressure and cam lift. I didn't see that mentioned on the ad you posted. Smith Brothers or Manton can help you with this.
           
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          • khryslerkid

            khryslerkid FBBO Gold Member FBBO Gold Member

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            They are 0.080 wall thickness. Sent them back. I contacted my former co-worker and we're going to cut down a long set that I already have. Gotta do what you gotta do!
            Thanks to who replied on this. Live and learn!
             
          • 383man

            383man Well-Known Member

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            I used Manton for my pushrods and they did a great job on them. Good luck with yours , Ron
             
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