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Thread: V-12 MOTORCYCLE

  1. #1

  2. #2
    I see the 6 [12] spark plugs, but why only 4 [8] exhaust ports?

  3. #3
    (╯°□°)╯︵ ┻━┻ Uber Patriot's Avatar
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  4. #4
    THE EXHAUST VALVES FOR THE CENTER PAIR OF CYLINDERS

    SHARE A COMMON EXIT.


    NOT A GOOD IDEA.... BUT FAIRLY COMMON PRACTICE.

    FORD FLATHEAD V8S HAD THREE EXHAUST OUTLETS IN THE BLOCK.


    IDEALLY, AN ENGINE WILL HAVE VALVES ARRANGED

    I/E-I/E-I/E-I/E, ETC. OR THE OPPOSITE.


    PRACTICAL CONSIDERATIONS OFTEN PRECLUDE THAT,

    AND IT IS COMMON TO SEE A HEAD THAT IS


    I/E-I/E-E/I-E/I ....WHICH PUTS TWO EXHAUST VALVES & PORTS

    TOGETHER AT THE CENTER...WHICH COMPLICATES COOLING.


    MANY ENGINES HAVE SIAMESED INTAKE PORTS...

    THE 216/235/261 CHEVROLET BEING A COMMON EXAMPLE.


    IT'S A SQUEEZE TO GET ALL THE AIR/FUEL AND EXHAUST

    INTO AND OUT OF A V-TYPE FLATHEAD ENGINE.

    CADILLAC DID A BETTER JOB THAN FORD.... BUT THEY COST A LOT MORE.

  5. #5
    SHUT UP, SHITMOUSE.

  6. #6
    A T-HEAD VALVE IN BLOCK ENGINE ELIMINATES MANIFOLD CROWDING, BUT

    YOU WIND UP WITH TWO CAMS AND A LARGE COMBUSTION CHAMBER WHICH

    LIMITS THE MAXIMUM COMPRESSION AVAILABLE.



  7. #7
    ''Government is the great fiction, through which everybody endeavors to live at the expense of everybody else.” ― Frédéric Bastiat

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