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Discussion Starter #21

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Discussion Starter #22
Did you read the article that CUDA put up in post 2, it references the fact that there will be much lower cylinder pressures when two cylinders fire next to each other in the order rather than from farther apart on the intake. The other thing I wonder about is that they run the exhaust pipes together to make the tones affect each other without combining the exhaust gasses, I don't know if that's to improve the sound or cancel it to quiet the output.

A quick test of the coyote order shows it to be pretty erratic as well as having areas with no pulses at all. (if I did it right)
It's good you mention that...I was meaning to read that, and forgot about it (cuz I had this puff map invention circling in my brainz).
 

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Discussion Starter #24 (Edited)
I expanded the puff maps further, to get a better sense of how many cycles look together: :blueblob:

Code:
Honda i4: 1-3-4-2

   **  **   **  **   **  **   **  **

1-2-3-4
Code:
BMW i6: 1 5 3 6 2 4 

             *             *             *             *
    * ***    *    * ***    *    * ***    *    * ***    *

1-2-3-4-5-6

Code:
GM 90 deg v6: 1-6-5-4-3-2

  *   *   *  *   *   *  *   *   *  *   *   *

 2-4-6
1-3-5

    * * *    * * *    * * *    * * *    * * *

Code:
Pentastar v6: 1-2-3-4-5-6

      *      *      *      *
      *      *      *      *
      *      *      *      *

1-3-5
 2-4-6

      *      *      *      *
      *      *      *      *
      *      *      *      *


Code:
LS/LT: 1-8-7-2-6-5-4-3

     **  *    *     **  *    *     **  *    *     **  *    *

 2-4-6-8
1-3-5-7

   *   **   *   *   **   *   *   **   *   *   **   *

Code:
Hemi and GM Vortec: 1-8-4-3-6-5-7-2 

         *              *              *              *     
  *      *    *  *      *    *  *      *    *  *      *    *

 2-4-6-8
1-3-5-7

       **       **       **       **
       **       **       **       **

Code:
Coyote v8: 1-5-4-8-6-3-7-2

       *            *            *            *     
       **   *       **   *       **   *       **   *

 5-6-7-8
1-2-3-4

   *   **   *   *   **   *   *   **   *   *   **   *

Code:
Viper v10: 1-10-9-4-3-6-5-8-7-2

          *                  *                  *                  *        
          *                  *                  *                  *        
  *       *       *  *       *       *  *       *       *  *       *       *
 
 2-4-6-8-10
1-3-5-7-9

        * *     *        * *     *        * *     *        * *     *
        *                *                *                *        
        *                *                *                *

Code:
Audi v10: 1-6-5-10-2-7-3-8-4-9

        *                *                *                *        
        *                *                *                *        
        * *     *        * *     *        * *     *        * *     *

1-2-3-4-5
 6-7-8-9-10

        * *     *        * *     *        * *     *        * *     *
        *                *                *                *        
        *                *                *                *

EDIT: revised above with Colorado-edition puff map
 

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Discussion Starter #25
I imagine the crossover pipe on the Hemi setup must get quite a work-out in equalizing the left bank. Remove the crossover pipe, and I expect the lub-lub-lub sound at/near idle would become very distinct.
 
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