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Thread: Advice on where to start with modified Silent Series

  1. #1
    Join Date
    Jul 2015
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    USA
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    Default Advice on where to start with modified Silent Series

    I picked up a used Crossbones and am working through it it get it to run right, I'd like some advice on the Supertrapp side. I spend most my time either riding cross country around 70 or crawling through small town speed traps just above idle.

    The bike is a 2009 running a S&S 510G cam, S&S teardrop air cleaner and a Power Commander V that was mapped with Vance & Hines duals with the loudest baffles.

    The bike now has SuperTrapp 2-Into-1 Silent Series (878-71590) with the internal baffle removed (welds ground off & pulled out). It still has the stock 14 discs and closed end cap installed and full packing. I inspected the baffle and it is undamaged.

    Here's my question: should I treat this thing like a Supermeg and start off by bringing the disc count up to 20, or does the Supermeg have some sort of baffle requiring me to use fewer discs. The bike seriously needs to be remapped, but I want to have a good starting point before paying for dyno time.

    PS: I'm not a big fan of the 510G, and am considering switching to an Andrews 26HG prior to remapping.

  2. #2
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    Feb 2015
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    United States
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    When you say the "internal baffle removed", does that mean when the discs are off the unit you can run a broom handle all the way to the inlet (header collector)? If so, yes 20 discs would be a good place to start.

  3. #3
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    Jul 2015
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    USA
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    Default

    Quote Originally Posted by schultz View Post
    When you say the "internal baffle removed", does that mean when the discs are off the unit you can run a broom handle all the way to the inlet (header collector)? If so, yes 20 discs would be a good place to start.
    Yes, that's exactly what I mean - thanks!

    Jim

  4. #4
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    Feb 2015
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    If you prefer more sound you could utilize 10-12 discs + an "open" end-cap.

  5. #5
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    Jul 2015
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    I'm aiming for a wide torque curve without destroying my gas mileage while ending up under 105 dBA (SAE J1287 test procedure). Still have a couple of years to get there, and one really nice thing about Supertrapps is if I'm a touch over it at tech I can pull discs until I'm there.

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