Poly 318 4 barrel intake

Engine, Trans & Driveline

  1. OrthmannJ

    OrthmannJ Well-Known Member

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    So I am toying with the idea of eventually converting the Fury to fuel injection using one of the popular aftermarket kits available out there today.

    But first I want to go to a four barrel intake and carburetor. I've done some looking and it appears that there was an aftermarket intake for the 318 Poly available for a while, but it looks like it is no longer produced.

    I don't plan to make this a race car, I'm not trying to make a ton of power, I just want something that is reliable. I'm looking for info and/or leads on a compatible intake.
     
  2. moparedtn

    moparedtn Ed on the Ridge FBBO Gold Member

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    Chrysler Power magazine has spent considerable time and money engineering probably the best poly
    4 barrel intake ever and they sell it now!
     
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    • theman440

      theman440 Well-Known Member

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      • OrthmannJ

        OrthmannJ Well-Known Member

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        Thanks for the info guys.
         
      • Evan Frucht

        Evan Frucht Well-Known Member

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        I have a mopar cast iron 4 barrel intake on mine, works good. You can find those for $300-400 if your lucky, most will ask 5. The only problem with the new one is that its tall so you might need to cut the hood... so I've heard.
         
        Last edited: May 23, 2020
      • 66 Sat

        66 Sat Well-Known Member

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        It sounds like you'd be better off with the factory 4 barrel intake. The Chrysler Power intake needs a few mods to work best such as a bigger cam. With standard engines you will lose too much low down torque. It's also pretty expensive and there may be a long lead-time depending on if there are any in stock. The Weiand 7503 isn't a great choice either as it has a huge torque hole below 3,000 rpm. Above those revs it is good though.
        The factory 4 barrel and a 600 vac sec carb should give you what you are looking for.
         
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        • OrthmannJ

          OrthmannJ Well-Known Member

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          I was wondering about that. I certainly don't want to cut a hole in my hood.
           
        • MoparLeo

          MoparLeo NRA PATRON LEVEL LIFE MEMBER FBBO Gold Member

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          Contact Bruce Toth at Chrysler Power and get current information, not possible info, or hearsay info. Find out what you can and cannot do from the people who make the stuff.
           
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          • 1974ChargerSE

            1974ChargerSE Active Member

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            I have the factory 4bbl on my 64 Fury Convertible. Hotter cam from Gary Pavlovik (Mopar Mailing List) and it runs great. New 4bbl carb from Edelbrock to top it off. Starts first time, every time and has great pickup and nice lope...
             
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            • 66 Sat

              66 Sat Well-Known Member

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              The Chrysler Power intake fits fine under a stock hood - it looks taller due to the open runner design. Compare the height in the pics below of a Weiand 7503, the factory 4 barrel, and the Chrysler Power manifold. It's not much taller. The info I gave you on the manifolds is legit. I started with a 7503, and swapped to a factory 4 barrel. The advice on the Chrysler Power was straight from Gary Pavlovich himself (poly guru and part designer of the manifold). He supplied me with all my parts including a hot cam, but told me I'd need to go bigger again for the manifold to work properly.
              20180413_180022.jpg 20181122_132520.jpg PolyManifold.png
               
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              • Darter6

                Darter6 FBBO Gold Member FBBO Gold Member

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                I had the Weiand 7503 on my stock poly. It is a single plane thus the torque loss at low RPM.
                The Chrysler Power intake fits under the hood of the early "B's" ok as in the photo below.
                IMG_2707.jpg IMG_2722.jpg
                 
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                • Demonic

                  Demonic Well-Known Member

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                  A friend of mine has the CP Intake on his built Poly stroker. It fits under his stock 65 Coronet hood just fine. Bill (my friend) actually penned an article on his motor that appeared in CP Magazine. Interestingly, at the time they did a comparison to the Weiand single plane intake on the dyno at JBRE in Glen Rock PA. The CP intake was better everywhere, all the way to 6000 rpm. Likely due to the raised-runner design. It's not cheap, but well worth it for a hot combination.
                   
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                  • Evan Frucht

                    Evan Frucht Well-Known Member

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                    You will be happy with whatever one you end up with. If the CP is in your budget it probabaly is "the best" I however am perfectly happy with my cast iron one at the moment. The car has a 318 with original iron intake and a carter AFB 650, I put a dual barrel 2.5 exhaust system with an X pipe. Runs really good, has tons of low down torque, and will chirp the tires if you want it to. Has not broke down on me yet and I was driving it daily for a couple months.

                    ALSO, my 64 Fury wagon supposedly has a stock cam that the PO told me he had re-ground to be hotter. Thats all I have to go on as the engine has been running strong since and I never have opened it up myself to check.
                     
                    Last edited: May 23, 2020
                  • 66 Sat

                    66 Sat Well-Known Member

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                    The Chrysler Power may well be the "best" intake, but might not work in your application without other modifications. I don't know how standard your engine is but if you currently have a 2bbl carb it is probably stock? These are the words from Gary Pavlovich re the Chrysler Power Manifold: "The OEM 4 barrel manifold will outperform the Wind Tunnel with your 258 camshaft. The Wind Tunnel needs minimum of a 264/.450” (222@.050”) to “work” as there is too much plenum for cams less than 222@.050”. I had several list members swap out their Wind Tunnels for the OEM Poly 4bb. Intake with 256 and 258 camshaft profiles as they lost torque & HP over the OEM Poly 4bbl. If you “up” the cam profile or Stroke your Poly then the Wind Tunnel would benefit you".
                    If you go with the bigger cam you might then need a higher stall converter (if you have an auto) and deeper rear gears. Once you start making changes the costs tend to escalate...as we all know from experience! Hope this info helps.
                     
                    Last edited: May 23, 2020
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                    • OrthmannJ

                      OrthmannJ Well-Known Member

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                      Thanks everyone. Lots of good information.
                      My car is bone stock. Grandpa never did anything to it other than change the oil and gap the sparkplugs. I know my Dad never did anything to the motor either.
                      I really don't want to blow the whole thing apart and start modifying it, I'm just looking to upgrade the induction a bit. This car is a cruiser, and being that it's been in the family since day one I intend to pretty much keep it that way.
                      After reading everything so far, it seems that for my intended purpose a stock four barrel intake is probably the way to go.
                       
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                      • Darter6

                        Darter6 FBBO Gold Member FBBO Gold Member

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                        Understand totally. Did mine like you want to. Weiand intake, 600 Edelbrock,dual exhaust,Petronix ignition. and that's it.
                        IMG_0819.jpg
                         
                      • Commando66

                        Commando66 Active Member

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                        • toolmanmike

                          toolmanmike Moderator Staff Member FBBO Gold Member

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                          How does it work for you. It looks great.
                           
                        • 440 4 speed

                          440 4 speed Well-Known Member

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                          In 1961 if I remember correctly, a 2 bbl 318 had 230 bhp, a 4 bbl 318 had 260 bhp and a 361 2 bbl was 265 bhp. Bit of trivia.
                           
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                          • Darter6

                            Darter6 FBBO Gold Member FBBO Gold Member

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                            toolman, It really made a difference over the tiny 2bbl and single exhaust.
                            Another car I never should have sold.
                             
                          • Darter6

                            Darter6 FBBO Gold Member FBBO Gold Member

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                            OrthmannJ, Just so you know TTI exhaust makes a full dual exhaust for the 64 Wagon. The 64 Dodge wagon pictured above has their exhaust system on it. It has their headers but they do make it from the manifolds.
                             
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