URD Spec-U Exhaust

Discussion in 'Underdog Racing Development (URD)' started by Gadget, Feb 28, 2014.

  1. x-runner kid

    x-runner kid Active Member

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    I finally fixed mine. Two resonators welded in just after the O2 sensor bungs. I'll do a better explanation of it tomorrow when I have more time.
     
  2. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Ya but it defeats the purpose. You go cat less for no restriction and the ability to tune it just a little hotter. By adding cats back in you have to tune it richer and even if they're "high flow" they're still a bottleneck. I have faith, a solution can and will be found.
     
  3. x-runner kid

    x-runner kid Active Member

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    I think you read that wrong buddy. Resonators not cats by any means. They are straight through 2.25" same as the spec-u system Y they are slightly larger on the outside. No restriction at all. Sound is exactly the same minus that horrible rasp.
     

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  4. x-runner kid

    x-runner kid Active Member

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    This is the inside no different in restriction from the resonator that's already in place in the system just a different shape. No need to look for a solution I already found one haha. Only cost me $50 per vibrant resonator and $20 for the stainless arc welding rod and my time.
     

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  5. fishsticks

    fishsticks Because fast lifted truck.

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    What P/N did you use?
     
  6. x-runner kid

    x-runner kid Active Member

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    I should have time to get some pictures tomorrow as well as get a much more in depth explaination of how and what I did. Not likely to do a full write up but at the least something to help those with the same issue.
     
  7. NHXRUNNER

    NHXRUNNER "New Hampster"
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    That I did
     
  8. throwinsparksatu

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    did you put one in each pipe on the y pipe?
     
  9. fishsticks

    fishsticks Because fast lifted truck.

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    I ordered a pair or resonators, Vibrant P/N 1790 (2.25"x12"). They'll be here Monday. I'll burn em in Monday afternoon if work lets out early.
     
  10. Tom2769

    Tom2769 Member

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    XRKid, thanks for stepping up and figuring out a fix for this issue. I've temporarily swapped back to my old exhaust until a fix was found - just couldn't take the buzzing anymore.

    Fish, post up your results when you get them burned in...
     
  11. x-runner kid

    x-runner kid Active Member

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    So glad to have the forum up and running again I will have to get new pictures as I somehow managed to put my phone is the washer machine on Tuesday. I will take some time tomorrow to use the go pro and go through my laptop and post up some pictures and videos of the system for all to see my fix and hopefully it helps others as well as G to put a stop to rasp.
     
  12. akakrill

    akakrill Member

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    Not complaining, but that's what that sound is.. I couldn't pin point it for the life of me.... it is not effecting performance or afr as far as I can tell. The hiss on mine accelerating under load sounds like a leaking charged intake pipe. A minor issue really.. but if your revising the design, count me in...
     
  13. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Fixed for you :rolleyes:
     
  14. x-runner kid

    x-runner kid Active Member

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    So where was the hissing coming from then?
     
  15. fishsticks

    fishsticks Because fast lifted truck.

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    I thought I had a boost leak as well. I even made a thread about it on here awhile back. I tore my truck apart looking for it until I realized it was the exhaust.
     
  16. fishsticks

    fishsticks Because fast lifted truck.

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    The resonators made a massive improvement. Cab noise at 2000-2500 RPM while under load is reduced and the hiss/rasp/resonance/whatevermarketingfriendlytermyouwanttocallit is gone. This thing actually sounds like an $1100 exhaust now.

    If you want to add these, you will need the updated passenger side collector pipe that G sent out. The resonator won't fit between the bends on the original piece. I don't know if G is still making these available or not.

    I took pictures if anyone wants to do a DIY.
     
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  17. Torspd

    Torspd Moderator
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    Post up the pictures already. Mr. Cliffhanger
     
  18. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Do it but create your own thread, we can link it from here but I think we should stop cluttering G's thread.
     
  19. x-runner kid

    x-runner kid Active Member

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    I have been dealing with phone issues but I should have something up in a new thread by the end of today. Sorry for the delay and the clutter on G's thread.
     
  20. fishsticks

    fishsticks Because fast lifted truck.

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