Thread: need explanation of Viper's firing order

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  1. #1
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    Default need explanation of Viper's firing order

    What does
    1, 10-9, 4-3, 6-5, 8-7, 2 (unequal firing 90-degree and 54-degree intervals)

    mean?

  2. #2
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    Default Re: need explanation of Viper's firing order

    Quote Originally Posted by jwolf View Post
    What does
    1, 10-9, 4-3, 6-5, 8-7, 2 (unequal firing 90-degree and 54-degree intervals)

    mean?
    Not sure what you are looking for exactly; but, the firing order follows the sequence:
    1,10,9,4,3,6,5,8,7,2 or what makes it easier for me to picture: 2,1,10,9,4,3,6,5,8,7 . In other words, front right, front left, rear right, rear left, etc....

    Numbering schame: Left side: front to rear...1-3-5-7-9 and Right side front to rear 2-4-6-8-10

    Here is a post that tries to explain the angle deal: http://forums.viperclub.org/2353911-post2.html

    That is the extent of my knowledge on the subject.

  3. #3
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    Default Re: need explanation of Viper's firing order

    You got me wondering about where the 54 comes into the equation. Here is another thread, see post #7
    http://forums.viperclub.org/rt-10-gt...-sequence.html
    Last edited by AZTVR; 03-07-2011 at 12:25 PM.

  4. #4
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    Default Re: need explanation of Viper's firing order

    Quote Originally Posted by AZTVR View Post
    You got me wondering about where the 54 comes into the equation. Here is another thread, see post #7
    http://forums.viperclub.org/rt-10-gt...-sequence.html
    Now I am confuzzled!

  5. #5
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    Default Re: need explanation of Viper's firing order

    Quote Originally Posted by jwolf View Post
    What does
    1, 10-9, 4-3, 6-5, 8-7, 2 (unequal firing 90-degree and 54-degree intervals)

    mean?
    Means it is a 90 deg block, but due to needing to fire all 10 banks in 720 deg (2 revolutions of the motor), they needed to get the pistoms firing at odd intervals - One at 90 deg, and the other at 54.

    If they all fired at 90 deg, then they would have 900 deg total revolutions for all 10 to have fired. Does not work.

  6. #6
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    Default Re: need explanation of Viper's firing order

    It's a V-10, four stroke. The engine math is a but strange if you're used to a V-8.

  7. #7
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    Default Re: need explanation of Viper's firing order

    Quote Originally Posted by jdeft1 View Post
    It's a V-10, four stroke. The engine math is a but strange if you're used to a V-8.

    Does 1,10-9,4-3,6-5,8-7,2 mean the same as
    1,10,9,4,3,6,5,8-7,2
    or does it mean the 10 and 9 fire at the same time?
    or at the same time every other revolution? (alternating a power and a waist spark))

  8. #8
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    Default Re: need explanation of Viper's firing order

    Each piston fires once every 2 rotations, or 720 degrees.

    In this scenario: 1, 10-9, 4-3, 6-5, 8-7, 2

    comma = 90 degrees
    dash = 54 degrees

    Fire 1, rotate 90
    Fire 10, rotate 54
    Fire 9, rotate 90
    Fire 4, rotate 54
    Fire 3, rotate 90
    Fire 6, rotate 54
    Fire 5, rotate 90
    Fire 8, rotate 54
    Fire 7, rotate 90
    Fire 2, rotate 54
    ----------------------
    Tot. Degrees: 720

  9. #9
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    Default Re: need explanation of Viper's firing order

    Quote Originally Posted by kcobean View Post
    Each piston fires once every 2 rotations, or 720 degrees.

    In this scenario: 1, 10-9, 4-3, 6-5, 8-7, 2

    comma = 90 degrees
    dash = 54 degrees

    Fire 1, rotate 90
    Fire 10, rotate 54
    Fire 9, rotate 90
    Fire 4, rotate 54
    Fire 3, rotate 90
    Fire 6, rotate 54
    Fire 5, rotate 90
    Fire 8, rotate 54
    Fire 7, rotate 90
    Fire 2, rotate 54
    ----------------------
    Tot. Degrees: 720
    Thanks, that is what I was asking.

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