Intake suggestions

Discussion in 'High Performance Modifications' started by HULKZ28, May 28, 2015.

  1. HULKZ28

    HULKZ28 Veteran Member

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    My 422. Motor needs an intake. It's a bored/stroked 400..11;1 comp. 210cc alum jegs heads. Light porting.Solid roller. [email protected] 625 lift. 108 lsa. Pretty sure I'll be using an AED modified 850 Holley..I have an edel rpm and Vic jr..thought about porting the rpm. The jrs ports r way small in comparison to the heads..looking for a good balance of torque/ hp..thanks. Good to be back..
     
  2. 79RedZ

    79RedZ Veteran Member

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    Is this a street/strip car? Purely street? Pure drag car? How about gears and transmission? Looking at your engine specs I would probably do a single plane. You have the cubes, the heads and the cam to warrant a single plane. With the cubic inches you have it will have a lot of torque anyways. I'm guessing the power range on that cam probably doesn't start till at least 3500.
     
  3. hhott71

    hhott71 R.I.P 11/19/18 Lifetime Gold Member

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    Holley 300-25
    You WILL need a 3" cowl hppd or other scoop.
    Next is a Super Victor.

    The port opening on a SBC is flaired out. Just port matching only builds out the flair.
     
  4. rally

    rally Member

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    I never liked to open up Vic Jr ports to the size of the inatke ports. Its always good to be a little smaller and not port match to much. Better velocity coming into the inatke port.
     
  5. kimosabi

    kimosabi Veteran Member

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    Better velocity and that little ridge you get between head and intake from a smaller intake port helps the atomized fuel to suspend instead of sticking to port walls. Port matching is more of a max effort high rpm type of deal IMO with big big intake velocities to limit unwanted turbulence.

    If there's some casting slag and parting lines in the intake you can grind those down but leave a rough surface.
     
    Last edited: May 28, 2015
  6. Damon

    Damon Veteran Member

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    That motor will eat all of a Super Vic NO PROBLEM. Big motors spinning at high RPMs need big ports. If it was a mild street driver I'd never suggest this intake, but in your case you're feeding a real beast. Let 'er eat.
     
  7. 450bench

    450bench Veteran Member

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    Weiand 7530 or a holley strip dominator.
     
  8. HULKZ28

    HULKZ28 Veteran Member

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    The strip dominator did very well in a hot rod comparison of single planes on a 406.my only concern is the effective rpm range of 4500-7500. Will it be flat below 4500 Rpms on my motor??Or will the larger motor bring It to life earlier.
     
  9. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    I run a Strip Dominator on my 11.1:1 sbc with a 257/269 @ 0.050 mech flat tappet cam . Even run a 2" open hole spacer between the carb and intake and runs very well on the street
     
    Last edited: Jun 3, 2015
  10. hhott71

    hhott71 R.I.P 11/19/18 Lifetime Gold Member

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    I ran the 300-25 Strip Dominator, the 69 Z28 and Vic JR intakes on my 041 headed and then 195cc Canfield headed 10:1 350 using a Crane 284 Energizer cam. The times from 60' to the 1/4 mi averaged out the same. So did the MPH. Incrementals all look the same
    I used each intake for months to get a good sample.
    3000 rpm coverter, 4.56 gears, 14x32" slicks in the old Race Vega.

    I need to try that 300-25 on the roller motor, Just for giggles.
     

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