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Thread: updated 15* and 13* SBC heads

  1. #1
    Senior Member SENIOR BUILDER
    Join Date
    Oct 2004
    Location
    Woodbridge, VA
    Posts
    101

    updated 15* and 13* SBC heads

    Hey gang,

    been a while since I've been around, .. been busy working on ports
    and cnc programs.

    I'd like to share a few things with you, ..
    I just did a total re-work on my 15* small block Chevy head, ..
    new ports and chamber, .. flows in the 390 to 400cfm range depending
    on valve size and application, .. makes killer power.
    It uses standard 18* cast manifolds and shaft rockers.
    We are using HIP processed castings for a stronger then cast cylinder head.
    http://raceflowdevelopment.com/RFD-h...ck-monster.htm

    The real killer is the new 13* stuff, ..
    We now have 5 different ports for this casting, .. and have a new version designed
    for big inch small block Chevy's at 440+ CI.
    It's a 320cc port that flows well over 440cfm with a 2.23" valve and can
    support 1000 HP.
    We use either custom built cast manifolds with custom adapters or sheetmetal intakes.
    http://raceflowdevelopment.com/RFD-h...odixGB2000.htm



    Curtis
    ----------------------------------------
    Race Flow Development
    Simultaneous 5-axis CNC Porting
    http://www.raceflowdevelopment.com

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    Nice flow #'s on those 13* heads, does the intake side support 18* intake manifold? I'm not much on carbs, and i know that Kinsler makes a stacks injection for the 18* heads. I talked to Brodix a couple weeks ago and they told me the exhaust side in milled at 55* just like a 23* head.

    Thanks in advance

    Zip.

  3. #3
    Senior Member MASTER BUILDER
    Join Date
    Dec 2004
    Location
    out of my mind in Kalamazoo, MI
    Posts
    179
    Nice numbers Curtis.....you're the Man.. :wink: :wink:

  4. #4
    Senior Member SENIOR BUILDER
    Join Date
    Oct 2004
    Location
    Woodbridge, VA
    Posts
    101
    Quote Originally Posted by zipper06
    Nice flow #'s on those 13* heads, does the intake side support 18* intake manifold? I'm not much on carbs, and i know that Kinsler makes a stacks injection for the 18* heads. I talked to Brodix a couple weeks ago and they told me the exhaust side in milled at 55* just like a 23* head.

    Thanks in advance

    Zip.
    No the 13* stuff we've been using sheetmetal intakes if it's a drag application,
    and we use custom built cast manifolds from Wilson if it's a Dirt car.

    The 15* head uses the 18* manifolds and rockers, .

    curtis
    ----------------------------------------
    Race Flow Development
    Simultaneous 5-axis CNC Porting
    http://www.raceflowdevelopment.com

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    Thanks Curtis,

    I'm a total injection person, have no intrest in a carb setup and am total alcohol injection.

    Thanks for the reply,

    Zip.


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