Intake choice for a 408 Magnum.

Small Block Mopar Engine

  1. 1994redram

    1994redram FABO Gold Member FABO Gold Member

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    I have a magnum based 408 in my dart. I'm hoping to start installing my Holley Sniper EFI pretty soon. It's an 11:1 compression engine with some edelbrock magnum aluminum heads. The cam is a Hughes engines .571/.576 lift and 234/238 @.050.
    It's a street/strip car, never gets used for daily driving.

    I'm currently using a street demon carb bolted to an Edlebrock airgap intake. I also have a Magnum M1 single plane on the shelf.

    What do you guys think the best intake choice would be? I will probably try them both eventually but I have to remove the intake to drill/tap a hole anyways.
     
  2. harrisonm

    harrisonm Well-Known Member

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    I have a moderately modified 340 (+/- 375 HP), and I really like my Air Gap. In your case, I think it mostly matters on what your plans are. A good dual plane like the Air gap will give decent low end torque and decent higher RPM HP. Whereas a good single plane will be better at higher RPMs and you might lose some lower RPM grunt.
     
    • Agree Agree x 2
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      RPM, done.

      The M1 is better suited for 3500+ rpm power band.
       
    • mullinax95

      mullinax95 Well-Known Member

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      Edlebrock airgap
       
    • Wyrmrider

      Wyrmrider FABO Gold Member FABO Gold Member

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      for u the M1
      for me the air gap
      I.m currently on the stock 92 mpfi
       
    • Lelo Dart

      Lelo Dart * FABO Gold Member

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      EFI will probably not like the dual plane intake.
       
    • 1994redram

      1994redram FABO Gold Member FABO Gold Member

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      I have read several things about the EFI not working too well with a dual plane. That said, there are a bunch of people using dual planes and EFI and loving it.
       
    • diymirage

      diymirage HP@idle > hondaHP@redline

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      intake-340Mopar-871-FP-3.jpg
       
    • harrisonm

      harrisonm Well-Known Member

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      I am going to quote myself here. After reading the Op's thread a little more carefully, I am going to go with the Airgap. It's an awesome manifold, and if he wanted more HP in a higher RMP band, a manifold swap isn't that much trouble.
       
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