Edelbrock Carb on a 318 Polysphere

Fuel and Air Systems

  1. TLH101

    TLH101 Well-Known Member

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    I have a chance to pick up an Edelbrock 600cfm carb for a good price. Is that too much carb for the stock 318 poly, with factory 4bbl manifold?

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  2. slepr1

    slepr1 Well-Known Member

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    Imo that will work just fine. Buddy of mine had a stock 340 with a 750 dp on it, ran fine. He traded it for a 650 vac sec and ran good too. So a 600 on a 318 is perfect.
     
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    • Montclaire

      Montclaire Well-Known Member

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      500 is plenty but the 600 will work. You’ll need a strip kit to neck it down a bit. Maybe look up what size jets come in the 500 and go up one step and see how it does.

      Carter-brocks can take a little time to set up correctly, but once they are dialed in they are very reliable. Pick up a vacuum gauge if you don’t already have one.
       
    • Darter6

      Darter6 FBBO Gold Member FBBO Gold Member

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      You will be fine.That's what I ran on mine.( I was using a Wieand intake ) Are you using the stock Iron manifold ? If so just double check the port openings for the throttle plates. Just to make sure of clearance.
       
    • PRND21

      PRND21 FBBO Gold Member FBBO Gold Member

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      If I remember right you’ll need an adapter, stock manifold has the small square pattern like a WCFB I believe.
       
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      • rolling_Thunder

        rolling_Thunder Well-Known Member

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        The factory 4bbl iron intakes yes... Same for the 2x4 factory set up --- the Weiand 7503 4bbl would accept a standard 4150 flange
         
      • TLH101

        TLH101 Well-Known Member

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        Have the correct adapter already.
         
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        • toolmanmike

          toolmanmike Moderator Staff Member FBBO Gold Member

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          It should work fine. I run a out of the box 600 Edelbrock on my 273 and it performs well and get's 19 mph on the highway.
           
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          • threewood

            threewood FBBO Gold Member FBBO Gold Member

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            Made my own and opened up the manifold a bit.
            20150406_215018.jpg 20150406_215120.jpg
             
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            • DodgeDos

              DodgeDos Member

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              I am running an Edlebrock carbon the weiand 7503 and it has good throttle response. Never had an issue.
               
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