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Nailhead intake risers

Discussion in 'The Hokey Ass Message Board' started by texasred, Jan 5, 2011.

  1. texasred
    Joined: Dec 3, 2008
    Posts: 1,084

    texasred
    Member
    from Houston

    Thinking of buying a set port matched intake risers for my 30 over 401 with a mild cam. can i expect more torque and horsepower using these
     
  2. donut29
    Joined: Mar 6, 2006
    Posts: 1,518

    donut29
    Member
    from canton MI



    Nope dyno has proven they lose HP
     
  3. mj40's
    Joined: Dec 11, 2008
    Posts: 3,280

    mj40's
    Member

    How much more torque do you need over stock? Those things have a bunch already.
     
  4. Port match the stock intake and exhaust manifolds, you will gain something.............donut is right, the risers do not work.
     

  5. mj40's
    Joined: Dec 11, 2008
    Posts: 3,280

    mj40's
    Member

    I need to add a little height to mine to clear the Moon valley pan I will be using with a 66 spreadbore 4bbl intake. I was thinking of using a set of the intake flanges to get 3/8" rise. That should be enough. What do you think?
    [​IMG]
     
  6. telriv
    Joined: Aug 24, 2005
    Posts: 67

    telriv
    Member
    from Conn.

    Cut the fins on the valley cover. It will be hidden under the manifold.
     

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