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  • speedzter
    speedzter
    6 years ago
    Quoting Hilly on 22 Jun 2018 06:41 PM
    "Stuck a different set of cams in the slim this arvo, set of T-Man 590 PS -2's.........."


    Just FYI, You may have seen this before, Matt Chalmers heads (MCE performance) , 
    110 at 10.2 comp ,T-Man 590 cams Crusher ex


    36303024_686953828314394_1006635605699854336_n.png
  • Jetta
    Jetta
    6 years ago
    Nice Softail Hilly......Still cant get over it.
  • Jetta
    Jetta
    6 years ago
    No problems ol mate.....
    Glad to see you rid of that Dyna...
  • 98fxstc
    98fxstc
    6 years ago
    Got a feelin' you're not finished yet.
  • fatbat
    fatbat
    6 years ago
    Quoting Hilly on 03 Jul 2018 08:44 PM 
    According to supertrapp the open end cap is worth 8 plates, they also say that 24 plates and closed end cap is starting to outflow their core so it's pointless to run more.

    I've seen supertrapp say this before too. I've had two bikes dyno tuned whilst experimenting with discs and end caps using the supermeg pipe.  The claim about the open end cap flowing the same as about 8 discs was pretty accurate. The claim about how much their core could flow wasn't. One of my bikes performed best on the dyno with 30 discs and the open end cap. The other performed best with 24 and open end cap. Best performance was always with the open end cap. The only benefit to the closed end cap was the quietness but it was too quiet for me. The open cap, even with 30 discs wasn't obnoxious 
  • Bonkerz
    Bonkerz
    6 years ago
    Think I have a  couple of sets of those thunder torque inserts somewhere.  I was really impressed with them, but had to go to an even quieter system thanks to a dumbass in our street bring to plod around daily.
  • 98fxstc
    98fxstc
    6 years ago
    If you have made up your mind you won't be going back to the closed end cap, you could open it up and look at modding it in the direction of a Burns/Guppy muffler exit
  • chriso
    chriso
    6 years ago
    Fuck hilly I’m not smart enough to understand this completely but it’s good to read about others that do. 
    Also hats off to you for experimenting and sharing.
  • 98fxstc
    98fxstc
    6 years ago
    I reckon that design would improve the 'through' flow due to less turbulence
    may be a bit louder
    better for HP but not torque
    but you can address that with your discs
    and get the best of both worlds

    the number and size of the holes in the perforated tube will give you more variables to juggle

    (very impressed with your logic and maths as well Hilly )
  • friday
    friday
    6 years ago
    that baffle up the guts looks similar to the Harris pipe with the spiral perforations , about 15-3/4 long inside
  • 98fxstc
    98fxstc
    6 years ago
    Trying to remember what my FatCat baffle looked like
    I don't think it had the locating collar both ends like yours
    I think it only had the locating collar at the exit and the smaller diameter pipe ( about 2 1/2" OD ) was jammed up into the entrance to the muffler
    more like the result you are trying to achieve
  • Adam76
    Adam76
    6 years ago
    Hilly, I'm very late but congrats on the new FLSS I love that bike. 
    What year was it? Last year NOS?
    Happy riding
  • fatbat
    fatbat
    6 years ago
    Sounds like a good plan. Look forward to hearing your progress 
  • 98fxstc
    98fxstc
    6 years ago
    aluminium ?
    don't see it used in exhaust systems often
    the thickness and type of metal changes the note
    eg mild steel compared to stainless
    remember the old trick with a section of copper in the exhaust to change the note on the old holdens ?
  • paulybronco
    paulybronco
    6 years ago
    Interesting read Hilly
  • speedzter
    speedzter
    6 years ago
    Hilly, you must have a really sensitive Dynobutt 250I dyno  !
    Love your enthusiasm to get the best out of what you have. Keep up posting .

    I wouldn't be too worried about not having equal length or stepped headers.
    I'm seriously not convinced of their benefit in the Harley V-twin world.
    Plenty of research articles out there on straight V stepped headers .
  • chriso
    chriso
    6 years ago
    Come up real tidy bud
  • chriso
    chriso
    6 years ago
    Bloody oath, as I said to you originally, better to see on your sled then sitting around in my shed for next few years 
  • fatbat
    fatbat
    6 years ago
    Exhaust and muffler looks really good Hilly. 
  • paulybronco
    paulybronco
    6 years ago
    That's a pretty big jump hilly! Better have a steady hand in the wet....
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4/14