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Thread: Supermeg on Dyna Fatbob

  1. #1
    DeuceBG Guest

    Default Supermeg on Dyna Fatbob

    Hi

    I have a 2009 FXDF with SERT fueler, SE Heavy Breather intake and a new Supermeg 2 into 1 which I have fitted once and then removed due to vibration at about 80 mph.

    Firstly,

    How many discs would you suggest with the open end cap to maximise low to mid-range torque?

    Secondly

    What would you suggest is the cause of the vibration?

    I was previously running V&H Shortshots with std baffles so the SERT setting is is as per that set-up.

    Many thanks
    Deuce

  2. #2
    bschultz Guest

    Default

    Quote Originally Posted by DeuceBG View Post
    Hi

    I have a 2009 FXDF with SERT fueler, SE Heavy Breather intake and a new Supermeg 2 into 1 which I have fitted once and then removed due to vibration at about 80 mph.

    Firstly,

    How many discs would you suggest with the open end cap to maximise low to mid-range torque? 6-8 discs

    Secondly

    What would you suggest is the cause of the vibration? How many discs and what end cap? Is the vibration apparent only with the 2:1 installed?

    I was previously running V&H Shortshots with std baffles so the SERT setting is is as per that set-up.

    Many thanks
    Deuce
    *************

  3. #3
    DeuceBG Guest

    Default

    Quote Originally Posted by bschultz View Post
    *************
    Hi, thanks for your prompt reply.

    I fitted 16 discs and an open cap, thinking along the lines of "More discs = more sound and more torque".

    The vibration is only with the 2 into 1.
    The ride is as smooth as silk across the range with the Shorties on.
    As smooth as an "A" series HD motor gets at least.

  4. #4
    DeuceBG Guest

    Default

    Quote Originally Posted by bschultz View Post
    *************
    So, any ideas regarding the vibration?
    All help very gratefully received.

    Deuce

  5. #5
    bschultz Guest

    Default

    The tune (SERT fuel map) for straight thru dual drag pipes is most likely not compatible with the characteristics and flow of the 2:1. So a retune is in order with fewer discs.
    More discs = more flow, more sound and potentially more high end HP
    Less discs = less flow, less sound and potentially more low end torque

    Another consideration if the vibration persists; are you using the front "P" clamp mount position? Some of the newer OEM pipes eliminated the front mount point.

  6. #6
    NYTPYR8 Guest

    Default Fatbob SuperMeg installs

    I have a 09 FatBob which sounds much the same config as yours and was running VH Big Radius. Only thing big there was the dead spot between 4200 & 4500rpm.
    I put on the SuperMeg 2:1 installed all the discs 24 I believe as well as the cap. went from 87/79 to 93/80 and no dead spots. awesome performance with no vibration, other than HD. Pure acceleration and power especially in the 3500 - 4200 range.
    I am in Denver too. NO H2O or AIR!!!
    Last edited by NYTPYR8; 01-26-2010 at 09:20 AM. Reason: clarificatron

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