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GTM V85TT Exhaust NOW WITH DYNO RUN

Discussion in 'V7/V85/V9 Chat & Tech' started by GTM®, Jul 24, 2019.

  1. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Dyno graph below showing 80(!) rwhp with our GTM TT Werks Full system with the long Meg, DIY open air box with high-flow filter and GTM RB EVO Fuel Kit w/GTM SAS Kit.

    Proto Full System with Short Meg:
    GTM-V85TT-Werks-FS.jpeg

    GTM Stepped Header system eliminates the silly covers. Skid plate stays:
    A9AEB39B-7FD8-4BAF-8041-29CDF167A13B.jpeg

    Short Meg:
    [​IMG]

    Long Meg:
    [​IMG]

    Axis Dyno Full Kit 80 rwhp! GTM Full Werks Exhaust Long muffler (above), GTM RB EVO Kit, GTM SAS Kit with DIY open air box lid and high-flow filter (all available linked above):
    784241F3-4B6E-4618-967E-4061474C7E32.jpeg

    DIY open airbox lid with high-flow filter element:
    2CFA4423-06C3-4A34-8AE9-F070FFD0B937.jpeg
     
    pepanmg and Poppe like this.
  2. Faisal

    Faisal Cruisin' Guzzisti

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    That looks nice. The finished product will look absolutely bitchin no doubt. Can't wait to see and hear the longer one with a cat delete.

    Are you thinking of diversifying the design or will it just be one exhaust type?

    How much gains in horsepower and torque do you except to see with a full exhaust system and a PCV?
     
  3. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Thanks, and diversifying how so? For the small few that will buy mine, I really can't spread my resources too thin. Everyone will likely forego mine for a bigger name brand, despite lesser quality and no dyno info.
    Power gains: Based on my two decades of Guzzi dyno work, getting them to the crank rated power is pretty easy, so 80 rwhp. We shall see just how stifled this motor is here soon. Dyno info to come when done and the fueling kit sorted, which will take some time, as no one seems to have full access to the ECU yet.
     
  4. Faisal

    Faisal Cruisin' Guzzisti

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    Have you seen the "big brands" you mentioned? Except for maybe one, they all look pretty horrible... That's a subjective matter, I understand, however; you need to actually be blind in one eye and have 90% cataract in the other eye to like the big brand designs over the GT-Rx design, even in its unfinished prototype phase.

    I'll be waiting for the dyno results and the full exhaust system then. 80rwhp sounds nice.
     
  5. kiwi dave

    kiwi dave GT Reference

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    Is the new pipe going to allow a normal pannier on the LHS, rather than having to extend outwards to avoid the existing silencer?

    I'd like to see a photo of the rear from directly behind.
     
  6. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    I sure have! And to me, they are all painfully bad recycles.
    Yes, I'm anxious to dig in. The ECU is in fact the same type as the California 1400 - with ride-by-wire of course. Ugh.
     
    AquilaTorre likes this.
  7. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Dave, I’ll snap one tomorrow. The stock muffler bolts to the outside of the mount, mine bolts to the inside as you see. I’m pretty sure mine is significantly inward. I also didn’t need to crush the connector pipe down like they did stock. My goal was to allow a symmetrically balanced bag set, yes.
     
    luigi57 likes this.
  8. Faisal

    Faisal Cruisin' Guzzisti

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    Todd,

    Is there anything reasonable that can be done to the stock exhaust or cat that will cause a decent / adequate exhaust tone? Or is it too much of a hassle?

    Something temporary until you're done with the exhaust system options.
     
  9. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Nothing simple or easy, no. I guess I would start with just the Y-pipe, which is available now on the STORE link above.
     
    Faisal likes this.
  10. Faisal

    Faisal Cruisin' Guzzisti

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    I'll have to wait then. Shipping costs of several parts individually will probably cost as much as a muffler.

    Also, removable baffle?
     
  11. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    I'll can't show the long version until one is ordered. We dyno develop the muffler and db, so it would not be removable, however all of my systems have a nice deep sound and deliver great power.
     
  12. Faisal

    Faisal Cruisin' Guzzisti

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    I see the skid plate for the headers are not installed. Is that just for photographic reasons or will they not fit due to the larger diameter?

    Have you had any luck with the tuning process? I would like to place an order for the full system + long muffler but I'm waiting on tuning updates as well.

    Thank you Todd. Great looking exhaust btw.
     
    GTM® likes this.
  13. Mayakovski

    Mayakovski High Miler GT Famiglia

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    Lookin' Sexy as Hell.
     
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  14. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Skid plate is still on. The silly header covers where they drop down to the tiny 1.5"/38mm diameter would not be reused, as those are just cosmetic covers.
     
  15. Faisal

    Faisal Cruisin' Guzzisti

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    Alright, sounds good then.

    I'll purchase the Y-pipe and muffler or possibly just the muffler until the tuning is done.

    Just some clarification, please. You mentioned that the Y pipe and headers will be sold as a set since they are of larger diameter. Does that mean your Y pipe will not fit the stock headers?

    Will Y-pipe + muffler combo cause deterimental leaning issues or would the bike be fine?
     
  16. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    I will offer two versions for the Y:
    1. One to fit stock headers and stock or aftermarket mufflers, or;
    2. A larger diameter inlet on the one only used with my full header system.

    Several companies are offering the combo right now, but they have quite restrictive mufflers. Since I haven't yet seen any air/fuel data, I will say that it likely leans the motor out even more, which I say is detrimental until the fueling is fixed. That won't stop anyone else from buying the big name versions though of course.
     
  17. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Stock bash plate with my prototype stepped header system, without the silly cover hiding the ugly/puny sized section of stock headers.

    541B41CD-1B9F-4F19-8995-392B49031BDE.jpeg
     
  18. Faisal

    Faisal Cruisin' Guzzisti

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    I actually like the cover. I mean I don't hate it, it looks fine to me but to each his own.

    Waiting on your sound clips! Can't wait to hear her burble with a proper exhaust.
     
  19. GTM®

    GTM® Administrator Staff Member GT di Razza Pura

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    Will post a video tomorrow, but for now a pic of our first production muffler...

    412D0FDC-F1B1-4E3F-A31E-9666FFE837D6.jpeg
     
  20. Faisal

    Faisal Cruisin' Guzzisti

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    Looks awesome.

    How much longer is the long version going to be compared to the short version?
     
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