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My home built ohv manifold

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  • My home built ohv manifold


    After seeing a picture on an old Hemmings article about Bill Cathcart, I saw a picture of an old Offenhauser manifold for a Champion Flathead. Since nobody that I can think of made anything for an OHV six, I thought I would give it a whirl. I had some big exhaust flanges that I bought from JC Whitney years ago that I welded up, 1/4 plate could be used to. I welded 1 3/4, 1 5/8 and 1 1/2 tubing inside each other so I could grind a transition from round tube to rectangular port... have not done that yet but each of these runners is around 4 inches long.

    I had a 2 1/2 tube that I found somewhere, cut it down to 16 1/2. I made the carb bases out of exhaust flanges and fine threaded bolts, I perhaps should have welded some plate together and tapped instead of welding a bolt to the flange.

    While I was putting this all together I had it bolted to an extra ohv head to hopefully prevent warping... it warped a little, nothing that a hammer wouldn't solve. I need to get a gasket to do some more filing and grinding.

    If anyone with better fabrication skills wants to help make more of these things, it can also be engineered for a 2bb ww if for a ohv 185

    Jeff T.
    Last edited by Jeff T.; 08-23-2010, 08:07 PM.
    \"I\'m getting nowhere as fast as I can\"
    The Replacements.

  • #2
    Hope that works out. Looks like fun.


    • #3
      Thanks for posting this and the pic Jeff!! Really neat ideas there, well thought out.

      Do you plan on installing soon and testing?
      Winston-Salem, NC
      Visit The Studebaker Skytop Registry website at:


      • #4
        Jeff - Looks great! Add some headers too! I had a set built for the OHV 6 a couple of years ago (but I'm still using the standard intake):
        Attached Files
        Scott Rodgers
        Los Angeles
        SDC Member since 1989
        \'60 Lark HT
        \'63 Wagonaire
        \'66 Frankenbaker


        • #5
          I have to get a hold of Bill Cathcart to see if he can make a set of exhaust headers. If not I have to figure out how to braze or weld to cast iron. I have extra ohv exhaust manifolds somewhere

          Jeff T.

          As far as testing, I have to clean up a pair of Carter AS carbs and put my extra six on it's truck frame for bench testing, if I haven't got headers yet I'll cap the stock manifold with some plate.
          Last edited by Jeff T.; 08-24-2010, 11:56 AM.
          \"I\'m getting nowhere as fast as I can\"
          The Replacements.