Opinions... 2 4's or 6 pack?

Big Block A body Tech

  1. ragtopfury

    ragtopfury Well-Known Member

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    Yep. six pack on my Fury for the last 13 years. I forgot the middle part of my last response. I'm running on 5 hrs sleep total, between the last 2 nights. Been a whacky weekend here.
     
  2. AJ/FormS

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

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    I only ever worked on one dual-4, and it was in a Bucket-Tee with a 350Chebby and an automatic.So,I'm gonna be arm-chairing here.
    And what I am gonna say, applies to a streeter only.And my experience is mostly with stick-cars. If you are gonna install an auto and keep it an auto, then almost anything will work, with a well-matched TC.

    I have to agree with Rocco, and here is why.
    Lets look at the 2x4;with 3.55s.....And probably 28s or better out back?
    If you go with a stick, you will want a progressive linkage on multiple carbs, or it will be hard to drive away smoothly. And with manifolds,quiet mufflers,and probably a little rumpidy cam; the engine may be a bit sluggish through the midrange.
    So now,the 3.55s/28s/ and sluggish midrange, but tricky to drive multi-throats, may conspire to make operation below 30mph less than comfortable in any gear except first gear; which will be 3100rpm.If you can get the progressive linkage working just right, this may not be a as big a deal as I am thinking, But with my limited experience, I would suggest sticking to an automatic and let the TC absorb the grief.
    With the 6bbl,we have a different problem in a stick car. If your rear tires hook; the secondaries will probably not open until about 25 mph and of course 65mph is coming up in about 3 to 4 seconds. So if you are after the looks;great but you may be disappointed in the zero to 25mph with a stick car.
    Now if your tires go up in smoke, none of this applies and if that is what you are after,either induction will be very nice, but I would favor the 4s.
    So now let's talk about Rocco's hard-to-beat single 4.
    This is a great idea! Especially with a spread-bore. The smaller primaries with a stick and 3.55s is a game-on combo. Excellent drive away, not so much torque that every time you step on it a lil too hard,your neck hurts,and if you pedal it a bit those big sewer dumps out back will power you up to the speed-limit in about 4 or 5 heartbeats. If it spins, all bets are off.
    Now if you are after the excitement of howling tires and smoke, then a single-4DP carb is your answer. With this guy, it easy to control the torque delivery, and so maintain the excitement as the tires heat up and start to wanna hook; just roll in a bit more throttle as that happens. The bigger primaries are welcome on a small-block, but on as big an engine as you are building, Ima thinking any size will do.Again recall that I am talking about a street stick car.
    As an aside, I'll never go back to an automatic. There are just too many fun-times to be had with a stick. If I was a laid-back,arm-out-the-window, kindof guy;ok then an automatic might be on the table.Or maybe if my engine had a preponderance of torque;maybe. But I just have a lil 367, and it wants to be on the torque curve all the time to be ready for anything. This requires tight tranny ratios and plenty of rear gear.oh an an adjustable "stall" in case I start at a lil too low an rpm. Just a lil pedal and it is blast-off time.
    You on the other hand,WILL have, a preponderance of torque, which will cover a multitude of issues we SBMers have to deal with.Basically you only issue will be to not release too much torque and thus over-power the chassis.
    So that brings me to the parting shot;All three of these inductions can be made to work.Two have KILLER looks.One may be a lil disappointing.One may be a bit troublesome to drive. And one comes in a plane wrapper but has killer performance in a streeter. I know which one I'd choose,
    And we haven't even talked about justifying the cost of that 6bbl
    Back to Roccos comment
     
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    • yellow rose

      yellow rose Overnight Sensation

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      He had not done a 6 pack until he did the 6 pack.


      Oh shit, I need a drink after that translation. Hope I got it right.
       
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      • spl440

        spl440 Everybody's Fool FABO Gold Member

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        I ram a max wedge cross ram on my 67 Charger, 440, auto, 3.55 gears, 2800 stall conv with dual Holley 450 carbs. Ran very good, do not remember the cam. about 500 lift, ran Rhoads lifters for good vacuum signal, about 8-10 at idle. Very good road manners, was my daily driver. love a good running dual quad car. My dart has small block, air, and flat hood, so only one quad:(
         
        Last edited: Dec 4, 2016
      • rumblefish360

        rumblefish360 I have escaped the evil Empire State! FABO Gold Member

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        Thanks YR, as the OP said, I also suffer from lack of sleep. Midnight shift worker and tons to do during the day because no one else can.
         
      • Old Man Mopar

        Old Man Mopar Righteous Dude

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        Then you will be slow. As born out by several comprehensive intake manifold comparison tests, the available 2x4 intakes (non-tunnel rams) for 440's work very poorly and even a mediocre single 4-barrel setup will have them for lunch. It's a good thing you like the look of the dual quads because in this case, that's all you'll get.
         
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        • Old Man Mopar

          Old Man Mopar Righteous Dude

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          Son-O-Ram%20sm_zps5zxeb93h.jpg

          The intake above is NOT a Cross Ram. It's a Son-O-Ram. Bizarre looking and good for parking lot conversation they were developed for big heavy cars like Chrysler 300's and although they make prodigious torque, by 5,000 rpm they are all done so they are not a smart choice for making horse power. Below is a picture of a Cross Ram.

          AampA%20Max%20Wedge_zps3mguh9zz.jpg
           
          Last edited: Dec 5, 2016
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          • ScampMike

            ScampMike Despicable Damn Yankee

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            I like the trips if you're doing a "resto-mod" look - and the dual quads for a hot rod... I have always liked the dual quads on a tunnel ram popping up through the hood look on a "pro-street" car..
             
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            • rumblefish360

              rumblefish360 I have escaped the evil Empire State! FABO Gold Member

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              The dual plane dual quad is a (or should be) very response and torquey on the street. I have not explored high end HP combinations considering the power band assigned to the intake. FWIW. The unit I have is for a small block.
               
            • Old Man Mopar

              Old Man Mopar Righteous Dude

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              Note - The comments I made regarding the 2x4 dual quad intakes apply only to the B and RB engines.

              Additionally, in a quote from HOT ROD Magazine, it was said regarding the Offenhauser dual quad intake (Edelbrock makes one too for the RB only):

              "Though its outright power isn’t up with the better manifolds, it does gain some credit for eye appeal in a low-rise package. If max output is your game, there are many better choices."
               
              Last edited: Dec 5, 2016
            • yellow rose

              yellow rose Overnight Sensation

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              HOT ROD MAGAZINE. That says it all. They are test fixers. And outright liars.
               
            • seabee

              seabee FABO Gold Member FABO Gold Member

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              I have no opinion on the OP. Just thought I'de share this recent Engine Masters episode testing dual quads versus tri-2's.
               
            • roccodart440

              roccodart440 Well-Known Member

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              If there was one thing I learned in my masters program it was how to evaluate sources.

              ALWAYS looks at who paid for the study.
               
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              • Old Man Mopar

                Old Man Mopar Righteous Dude

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                The principle at the shop where our chassis construction and welding is performed is an instructor in the
                racing program at UNOH where the Engine Masters competition is held.

                I see the manifolds shown in the photo above are for a SBC. The particular comparison characteristics
                I made mention of are true ONLY on the Mopar B/RB (as far as I know).
                 
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                • rumblefish360

                  rumblefish360 I have escaped the evil Empire State! FABO Gold Member

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                  EVERYTHING, is combo dependent. While the video is good, it is not the whole story, just one page. A fun page, but just one.
                   
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