khromewerks hp-plus anybody ?

Discussion in 'Engine, Fuel and Exhaust' started by pipereefer, Apr 29, 2009.

  1. pipereefer

    pipereefer Member

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    considering khromeworks 3.50 hp-plus slip-ons to complete stg 1 on 08 flht. Anybody running these? not looking for a loud set-up, wanting performance with a nice sound. or 3.00 touring ?
     
  2. R. Lewis

    R. Lewis Senior Member Retired Moderators

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    IMO --- anything over 2" slips you will be losing perfomance ( loss of back pressure / bottom end torque )
     
  3. glider

    glider Veteran Member

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    Good info here, stay smaller than 2" baffles.
     
  4. pipereefer

    pipereefer Member

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    I'm glad i asked. I thought 3.50 was outside diameter! They advertise a quieter slip-on and more low end power than the 3.00. hard to figure why a company only sells 3 & 3.5" touring slip-ons. I dont recall advertised as baffle sizes. back to the
     
  5. glider

    glider Veteran Member

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    More than likely it is the outside diameter but the baffle is what you should be concerned about. No bigger than 2"
     
  6. pipereefer

    pipereefer Member

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    confused now as this is second time someone said 3.50" is too big a baffle but I dont think it is the baffle size. they dont advertise the baffle size, just how its made for each model: 3.50"HP-Plus "Touring", 3" hp-plus touring, and HP Plus touring Lite. You tube sound clips sound nice, but these are "new" i guess and wonder if anybody out there running any of these on a bagger? It does seem odd that there is no mention of baffle size in their advertisement/web site. Reason Im inquiring is they advertise Quiet and freeflowing.
     
  7. glider

    glider Veteran Member

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    I'm reasonably sure that the largest baffle is about 2 1/2". What you are referring to is the diameter of the muffler body. Considering the head pipes are 1 3/4" you can see where I am going here.
     
  8. byuddy

    byuddy Member

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    Not sure if this helps, but I have a pair of Khrome Werks HP-Plus slip-ons for my Dyna. The mufflers measure 3 inches in diameter, and the opening in the baffle matches the head pipe ... 1 3/4 inches. I think they are a bit loud.

    Bud
     
  9. pipereefer

    pipereefer Member

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    thanks bud, getting somewhere now. the 3.50" is supposed to be quieter. khromewerks doesn't mention baffle sizes and they show a cut-out picture of the touring mufflers. "front and rear chambers " instead of baffles seems to be their own terminology? other a bit loud, performance anything special?
     
  10. byuddy

    byuddy Member

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    I had only the HP-Plus slip-ons on the bike, and otherwise stock air cleaner, and no fuel modification. The dealer said the ECM would compensate for the mufflers. As long as I didn't change anything else, the only difference would be a small loss in low speed torque. That was my experience, and I needed to twist the throttle a bit more at startup.

    The HP-Plus mufflers were a bit louder than I like, and my ears would ring for about 30 minutes after a ride. Could be because I wear a full face helmet with a face shield. I tried a 3/4 helmet ... even no helmet, but I couldn't find the right combination. So now I'm back to drilled-out stock mufflers. They sound OK to me, but I don't know how they sound to others. Performance is fine.

    But I'm thinking about going back to the HP-Plus and also a better breathing air cleaner plus a TFI or something similar. I don't plan to change anything else. I expect I'll get better performamce and a better sound. Maybe I'll have to wear one or two earplugs.

    Bud