Single plane on a street car??

Fuel and Air Systems

  1. roccodart440

    roccodart440 Well-Known Member

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    The test, despite the cam, answered the OP's questions was my point.
     
  2. Mattax

    Mattax Just the facts, ma'am FABO Gold Member

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    Strip Dominator was tested, not a Street Dominator. RDA asked about the latter.

    As far as the LD4B abd LD340 go, there are four pages of excellent discussion on those.
    Edelbrock LD4B
     
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    • Mattax

      Mattax Just the facts, ma'am FABO Gold Member

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      I've run that intake and its decent. Ran good at the track and autocross. Idle to off idle was OK for street. As good as stock with a stock cam? That I can't say. For hood clearance its great. I ran it with a 4 hole 1/2 phelonic spacer. I'd suggest an insulating spacer like that. Might also want a valley oil spash pan to keep the hot oil off the bottom. For the throttle cable, a low rise bracket is needed. I think I took mine from a 2 bbl in a wrecking yard.
      I wouldn't worry too much about the smaller port disparity. It has advantages - I should have left mine that way for what I was doing. Mine was port matched. Do this carefully if you do it as head port to bolt placements vary from head to head.
       
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      • cpearce

        cpearce Well-Known Member

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        Was this the M1 dual plane w2 intake, or a modified LA intake? I'd love to hear about your engine specs, I'm going to try one of the dual plane M1 intakes on my 408 W2 engine.
         
      • threewood

        threewood Well-Known Member

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        Holley Street Dominator is fine for the street. In a big block it is pretty darn close to the Edelbrock RPM dual plane intake.
         
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        • lilfontleroy

          lilfontleroy annoyinglilLeRoy FABO Gold Member

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          @72bluNblu nailed the answer = @Rainy Day Auto it'll work on a street car for sure it really depends on how you plan to drive it and what is important to you performance wise. you'll suffer a little on bottom end torque but overall it should do you well.... any other performance mods going with it?
           
        • pishta

          pishta I know I'm right....

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          4sp can cheat on the powerband by keeping everything higher. Only reason Mopar went with a single plane on the new for 65 4bbl was the height limitation of the existing platform. Dont know why they didn't choose a dual plane and make the air cleaner a drop base? Probably cheaper just to add a 4bbl pad on the existing 2bbl intake. They said they did 'extensive testing' (with accounting???) on the new 4bbl single plane intake for the 4bbl package but who knows...
           
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          • str12-340

            str12-340 FABO Gold Member FABO Gold Member

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            I've run a lot of manifolds on my 340 Dart over 25 years - for the street I'll always take an LD340... Weiand Stealth is a close second.
             
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            • rumblefish360

              rumblefish360 so close yet so far away

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              Depending on the cam and rear gear, yup!
               
            • RustyRatRod

              RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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              Hay orange...........KNIFE!
               
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              • lilfontleroy

                lilfontleroy annoyinglilLeRoy FABO Gold Member

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                AHHHHHHHHHHHHHH
                Orange_Knife.png
                 
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                • AJ/FormS

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

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                  I ran an X-cellerator single on a stock low-C 318. It worked pretty good; with TTI headers, twin 3" duals, a Commando box, and 4.30s.. A smallport cast iron and TQ worked better with a 904/3.55s
                  I ran my HO367 with a factory iron intake and a TQ. Also with the the X-cellerator on it. But the AirGap covered both ends better.
                  If I already had the Holley installed, I would run it; but on a low-C 340,I would not swap out the factory iron for it.
                  I think, when it comes to intakes, and on the street; the rest of the combo has a lot to do with it, especially when ~90% of driving is below 3500, and mostly at part throttle. Here torque is king. With a low-C engine and 3.55s, I'd sacrifice 20hp at 5000 for 20 ftlbs at stall.
                   
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                  • famous bob

                    famous bob mopar misfit

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                    I have run single planes on every hot rod I `ve built , and had no problems with any of them , that being said , all have had a lot of torque and h.p. , the single plane wraps fast and has shown me no loss of low end power when tuned right.----jmo
                    If its a street only small block ???????????
                     
                    Last edited: Mar 16, 2019
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                    • 66fs

                      66fs Well-Known Member

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                      If you are running a stock 73 340, just run the stock intake and Carb. They run great on the street. The Street Dominator is for small port 273/318 heads and will be a power loss.
                       
                    • oldkimmer

                      oldkimmer FABO Gold Member FABO Gold Member

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                      I’ve ran a few street dominators. I really like them. The Z series is the best down low on account of the plenum divider and balance tube. Kim

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                      • famous bob

                        famous bob mopar misfit

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                      • rumblefish360

                        rumblefish360 so close yet so far away

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                      • oldkimmer

                        oldkimmer FABO Gold Member FABO Gold Member

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                        It is different that’s for sure. It’s a balance tube between cylinders to equalize the cylinders. Back then because of the firing order it was that number 5 would be robbing fuel from number 7 on the left bank and I believe 8 and 4 on the right bank. Google Zoe’s Arkus Duntov. He is the father of the Coevette. It is his design. Kim
                         
                      • oldkimmer

                        oldkimmer FABO Gold Member FABO Gold Member

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                        Yes, it will. Kim
                         
                      • rumblefish360

                        rumblefish360 so close yet so far away

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                        Thanks man. I haven’t had that particular model in my hands, so I didn’t know for sure. Some companies have cast a spreadbore pad but not large enough for a TQ carb. @high.rev.trev just picked one up for dirt cheap. He just posted a picture of the bottom. IDK what the top side looks like. A few of us are awaiting pictures. The one I had was good to go for a TQ with a very wide open area.
                         
                      • oldkimmer

                        oldkimmer FABO Gold Member FABO Gold Member

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                        Well, I’ll just have to try a TQ on it, I just figured because it had a spread bore pattern it would fit, maybe it’s for the Rochester Q jet cause this style was made for the Corvette. Kim
                         
                      • high.rev.trev

                        high.rev.trev Well-Known Member

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                        Yes. A Thermoquad will fit ..
                        If a Q-jet fits, the Thermo will.
                        Heresafew pics of another Street Dom too, this one the"Z" Version, like other pics...
                        Mmm

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                      • famous bob

                        famous bob mopar misfit

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                        Yeah, I just noticed the water outlet of the small block . 7-8 n ''duh ''
                        Musta really been a diff . tho------
                         
                      • rumblefish360

                        rumblefish360 so close yet so far away

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                        Oh! You have one of the “Z” intakes. Nice!
                         
                      • dirty white boy

                        dirty white boy 47 yr old Juvenal delinquent

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                        street dominator2.jpg

                        got one of the Z's on a craigs list deal, if i ever get started on my duster!
                         
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