Best carb choice for 318

Fuel and Air Systems

  1. Chedrick

    Chedrick Member

    Messages:
    6
    Likes Received:
    3
    Joined:
    Aug 13, 2018
    Location:
    Southern Ohio
    Local Time:
    8:19 PM
    I’ve done a lot of searching and it seems that most of the posts I’ve found are a few years old so I apologize if this has been covered recently.

    I have a 74 Duster with a 318 that was rebuilt when we put it in. Supposedly has a mild cam, I don’t know the specs on it. It has a performer intake and headers. We had a eddy 750 carb on it but realized that was probably too much. I picked up a Holley 600 (1850-2 I believe) off Craigslist, rebuilt it and have been screwing with it but I don’t think I’ve gotten it to it’s full potential. It needs an electric float conversion kit and instead of spending 70 bucks for that and more time trying to figure it out, I think I’m going to buy a new carb and bolt it on......wife’s got things that need to get done and carb tuning doesn’t seem to be on the list. I want to learn, just don’t seem to have time at the moment.

    Seems the general consensus is a 600-650 Holley or Edelbrock but what about the demon carbs and some of the newer designs that have come out over the last few years? Any thoughts on those? I looked at the fuel injection set ups but I’m afraid of parts support and electrical issues that may arise 10+ years done the road. Thanks
     
  2. thesiren74

    thesiren74 Well-Known Member

    Messages:
    1,298
    Likes Received:
    892
    Joined:
    Feb 23, 2014
    Location:
    kenosha,wi
    Local Time:
    7:19 PM
    Street demon is a put it on and go carb.
    They work really well.
     
    • Like Like x 1
    • 318willrun

      318willrun Utube channel 318willrun

      Messages:
      14,891
      Likes Received:
      15694
      Joined:
      Sep 13, 2013
      Location:
      I'm here
      Local Time:
      7:19 PM
      I have 1200 cfms on my 318 with mild cam, no headers, works GREAT! Any 600 cfm will run it well if you tune it properly.
       
      • Like Like x 1
      • Agree Agree x 1
      • toolmanmike

        toolmanmike FABO MODERATOR Staff Member FABO Gold Member

        Messages:
        50,523
        Likes Received:
        35542
        Joined:
        Jan 18, 2006
        Location:
        Iowa
        Local Time:
        7:19 PM
        I have bought a couple near new 600 Edelbrock carbs for $100. Perfect size for a 318. Easy to tune if needed.
         
        • Agree Agree x 4
        • krazykuda

          krazykuda Well-Known Member FABO Gold Member How-To Section Editor

          Messages:
          53,698
          Likes Received:
          18689
          Joined:
          Aug 20, 2007
          Location:
          Orland Park, IL
          Local Time:
          7:19 PM
          • Like Like x 2
          • rumblefish360

            rumblefish360 So close, yet so far away FABO Gold Member

            Messages:
            38,356
            Likes Received:
            9992
            Joined:
            Jun 21, 2005
            Location:
            New York, on a Island
            Local Time:
            8:19 PM
            @Chedrick Your right, 600/650 years s about all you’ll ever need on a 318. The new styles carbs are also fine to use over the older more established and known carbs. Each can offer something different and/or unique. In the end, it’s just a carb, so, choose which ever one your comfortable with tuning.

            The Holley is the most flexable & tunable.
            The Carter/Edelbrock’s are rock steady performers.
            I suggest a new AVS II.
            The newer carbs have also shown themselves well.
            No matter what you choose to out on top, the only thing that matters is how well it is tuned.

            Make buddy Mike getting down in my carbs way back when....
             
            • Like Like x 1
            • sireland67

              sireland67 FABO Gold Member FABO Gold Member

              Messages:
              9,077
              Likes Received:
              3242
              Joined:
              Oct 27, 2010
              Location:
              WV
              Local Time:
              8:19 PM
              • Like Like x 2
              • Agree Agree x 1
              • Chedrick

                Chedrick Member

                Messages:
                6
                Likes Received:
                3
                Joined:
                Aug 13, 2018
                Location:
                Southern Ohio
                Local Time:
                8:19 PM
                Thanks for all the thoughts.....pulled the trigger on a Demon from summit. The AVS II looked like it would be just as good but didn't sound like it was $50 better. The description said I may need an air cleaner spacer or adapters to clear the choke linkage, have you guys needed any of that? I'm running a kickdown cable instead of the factory linkages. Thanks again!
                 
                • Like Like x 2
                • sireland67

                  sireland67 FABO Gold Member FABO Gold Member

                  Messages:
                  9,077
                  Likes Received:
                  3242
                  Joined:
                  Oct 27, 2010
                  Location:
                  WV
                  Local Time:
                  8:19 PM
                  My factory air cleaners will fit with no issues, but an aftermarket drop base air cleaner will not work.
                   
                  • Like Like x 1
                  • toolmanmike

                    toolmanmike FABO MODERATOR Staff Member FABO Gold Member

                    Messages:
                    50,523
                    Likes Received:
                    35542
                    Joined:
                    Jan 18, 2006
                    Location:
                    Iowa
                    Local Time:
                    7:19 PM
                    Make sure you check in with your progress. Take lots of photos. Heck maybe even a video or two. Our inquiring minds want to know! LOL
                     
                    • Like Like x 1
                    • Agree Agree x 1
                    • RustyRatRod

                      RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

                      Messages:
                      61,843
                      Likes Received:
                      34000
                      Joined:
                      Jun 7, 2010
                      Location:
                      Georgia
                      Local Time:
                      8:19 PM
                      I have the Street Demon on my 75 F250 and it pulls like a beast.
                       
                    • mopowers

                      mopowers Well-Known Member

                      Messages:
                      4,772
                      Likes Received:
                      1892
                      Joined:
                      Feb 15, 2006
                      Location:
                      West Sacramento, CA
                      Local Time:
                      5:19 PM
                      My go-to for 318's is a tried and true 1850 Holley. They work very well for a stock-mild 318 build. A well-tuned 3310 will work fine as well. Hell, a 4776-4779 will work as well if you're willing to tune it.
                       
                      • Agree Agree x 1
                      • AJ/FormS

                        AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s

                        Messages:
                        18,559
                        Likes Received:
                        6686
                        Joined:
                        Jan 19, 2014
                        Location:
                        South-Central Manitoba,Canada, 900ftelevation
                        Local Time:
                        7:19 PM
                        My 318 ran gangbusters with an 850 Carter-rated Thermoquad. It was smokin' hot, stock-cammed, 1973 smogger teen with TTIs and dual full-length 3inch pipes. Badaboom. Spread-bores rule!i
                         
                        • Like Like x 1
                        • Chedrick

                          Chedrick Member

                          Messages:
                          6
                          Likes Received:
                          3
                          Joined:
                          Aug 13, 2018
                          Location:
                          Southern Ohio
                          Local Time:
                          8:19 PM
                          Great thing about being in Ohio is Summit parts arrive the day after ordering them. I got the carb on Friday and have it mostly installed. Need to modify or make a throttle cable stud as the hole is smaller on the Demon then on the extension bracket I had. They sell one for 31 bucks extra (124007DEM) but not sure I can justify that. It fired right up but I didn't have time to get it out of the garage so hopefully a test drive will be in order tomorrow or Monday. Ill post a picture or two of the car if I can remember how to do it on a forum
                           
                        • Chedrick

                          Chedrick Member

                          Messages:
                          6
                          Likes Received:
                          3
                          Joined:
                          Aug 13, 2018
                          Location:
                          Southern Ohio
                          Local Time:
                          8:19 PM
                          IMG_7730[1].JPG IMG_9628[1].JPG
                           
                          • Like Like x 1
                          • Noel G

                            Noel G Enough is too little. Too much is just right

                            Messages:
                            15
                            Likes Received:
                            24
                            Joined:
                            Mar 14, 2020
                            Location:
                            Warwick, QLD, Australia
                            Local Time:
                            10:19 AM
                            Hi Everyone, Ive got a almost stock 318 except for the MP260 cam (yeah overcooked!) and a Chrysler CI dual plane (TQ patten) manifold, which has worked well with a Carter AFB (pre Edelbrock)with an adaptor . It's started playing up (can't hold an idle speed and now won't idle - seen a few Holleys do this) and I'm loosing patience with 40- 50 YO carbs. I have a second hand Chrysler fit QJet with a dud choke unloader (pic included), are these still available in the USA? Also has any one tried a AVS2. I read some old posts that held the AVS in high regard and am wondering if anyone has tried the new model on a 318? Cheers. IMG_0026.JPG IMG_0029.JPG
                             
                          1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                            By continuing to use this site, you are consenting to our use of cookies.