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Aftermarket exhaust question

Discussion in 'Motorcycle Tech Talk' started by Dino, Jan 16, 2008.

  1. Dino

    Dino New Member

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    I've got a 2002 FLSTFI Fatboy. It has the Kuryakin 'V' filter (K&N), thunder header and a stage I upgrade. I just bought the Samson Big Guns II Street Sweeper exhaust (with torque cones) and now I'm unsure if I'll need to remap the computer. They're not installed yet. Any thoughts?

    [​IMG]
    Dino, Jan 16, 2008
    #1
  3. skull2007

    skull2007 Active Member

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    sounds like you will need to. just about any change in air flow would benefit from a map change.
    skull2007, Jan 16, 2008
    #2
  4. chucktx

    chucktx Moderator Staff Member

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    yup. ditto what skull said!!
    nice bike:)
    chucktx, Jan 16, 2008
    #3
  5. Dino

    Dino New Member

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    Well, since I did the stage I it seems to be running a little rich (I'm such a carb guy). How would I know if it needed a map change? Or should I just pony up the $150 to flash the box?

    [​IMG]

    :confused:
    Dino, Jan 16, 2008
    #4
  6. skull2007

    skull2007 Active Member

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    the only way to know or adjust it would be to go with a aftermarket fuel management system. the steeler will want for you to go with their "race-tuner". or worst they'll will flash your ecm with one of their shot in the dark downloads, then maybe dyno you $$$$$:gah: so i would recommend thinking about one of these two:
    1. thunder max
    2. powercommander III

    your'll have to spend $350- $900, but it will be an investment over time and give you control over your "maps" and plus not have have to depend on the steeler:brick: good luck with your choice:devil:
    skull2007, Jan 16, 2008
    #5
  7. Dino

    Dino New Member

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    At first I thought it (steeler) was a typo. :D I suppose I'll just work another weekend so I can buy the PC III. Thanks:)
    Dino, Jan 16, 2008
    #6
  8. ringo912

    ringo912 Active Member

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    Looks like ya have a 2-1 Thunderheader exhuast in the picture, just curious, why are ya going to straight drag pipes?
    ringo912, Jan 16, 2008
    #7
  9. ironhorse

    ironhorse Active Member

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    good question ringo, I'm guessing he ain't from denver though:roflmao: :roflmao:
    ironhorse, Jan 16, 2008
    #8
  10. hotroadking

    hotroadking Super Moderator Staff Member

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    JMO

    Thundermax about $600 you install it, easy as cake, it tunes the bike as you ride so be sure to get the auto tune feature.

    PC3 WILL NEED a dyno tune.

    Down the road you change pipes the Tmax adjusts the PC3 will not, same if you change filter, cams, pistons, head work etc the Tmax does the dyno tune.

    call Phil at California Phils Concordia, KS (785) 243-9991 he sells the Tmax at a good price tell him HRK sent you, that way he'll only gig you an extra 10% for my commission LOL :roflmao:

    BTW what are you going to do with the thunderheader and what year is the mid-year under the cover, 63 -67 is what it looks like,
    hotroadking, Jan 16, 2008
    #9
  11. Dino

    Dino New Member

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    I picked up the Samson Big Guns II Street Sweepers off Craigslist for $200. I like the two pipe look. Looks like it's a bigger hassle than a carb'd engine for sure. Welp, I'll try to sell the Samson's to recoup some $$$ and stay with the Thunderheaders. I'm hearing you guys think they're better anyway. :cheers:

    [​IMG]
    Dino, Jan 16, 2008
    #10
  12. skull2007

    skull2007 Active Member

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    from what i've read up on thundermax is the leader in this department. seems thundermax is by far the best choice. my pc iii has worked flawlessly for the past couple years. if i had to do over again i'd go with thundermax
    skull2007, Jan 16, 2008
    #11
  13. ringo912

    ringo912 Active Member

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    Straight headers are ok for the strip, on a street bike you will loose a lot of performace. For performance, 2 into 1 is the best bet. JMO but it's been my experience that torque cones don't really do anything for performance.
    ringo912, Jan 16, 2008
    #12
  14. chucktx

    chucktx Moderator Staff Member

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    looking at your pipes, they dont show a rich condition....from the pic they look just about right. keep the pipes you have and loose the streetsweepers....your getting good advise.......:)
    chucktx, Jan 16, 2008
    #13
  15. hotroadking

    hotroadking Super Moderator Staff Member

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    Thundermax and thunderheader, get the 02 bungs in the thunderheader for the sensors it's the best deal.
    hotroadking, Jan 17, 2008
    #14
  16. DKIN21

    DKIN21 New Member

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    I Agree With Chucktx, Looks Like They Are Burning Good, Mine Are Black, But Think It Is A Little To Rich. Great Looking Bike By The Way


    Dkin21

    Live Easy, Ride Hard
    DKIN21, Jan 22, 2008
    #15

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