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Flat Plane vs. Cross Plane Cranks

Discussion in 'Technical Q&A' started by Fly'n DutchMan, Nov 21, 2005.

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  1. Fly'n DutchMan

    Fly'n DutchMan Karting

    Oct 4, 2005
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    Sander Brouwers
    #1 Fly'n DutchMan, Nov 21, 2005
    As you've guys have probably noticed, the F430 literature makes it a point that the F430's engine is a flat plane crank engine with the corresponding firing order.

    Is the F430 the first street Ferrari with a flat-plane crank. Some literature says that is the case, other literature says that all Ferrari's are flat plane crank designs.

    http://www.autozine.org/technical_school/engine/smooth4.htm
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    #2 Steve Magnusson, Nov 21, 2005
    Last edited by a moderator: Sep 7, 2017
    I believe most (if not all) Ferrari V8 use a flat plane crank (e.g., 308), but all Ferrari engines do not use a flat plane crank (e.g., TR where the crank throws are 120 deg apart).

    The "nice" quality that all 2-bank Ferrari engines share is "alternate-bank-firing" (using a flat crank in a 90 deg V8 block is one way to achieve this, but it doesn't require a flat crank in a 12 cyl).
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  3. Fly'n DutchMan

    Fly'n DutchMan Karting

    Oct 4, 2005
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    Sander Brouwers
    #3 Fly'n DutchMan, Nov 21, 2005
    Interesting....
     
  4. Watry

    Watry Karting

    Aug 8, 2005
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    Andrew Watry
    #4 Watry, Nov 22, 2005
    Yes, as far as I know, all the Ferrari street V8s are flat plane. That's what gives them the four-cylinder sound and shriek, rather than the dual-plane V8 burble that comes from American cars and Alfa Montreals. To me, Ferrari V8s sound most like Cosworth V8, which are also flat plane, or hot four-cylinders (again, Cosworth BDA comes to mind).

    Andrew Watry
     

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