Will I be too noisy?

Discussion in 'Trackdays' started by okeloon, Jan 31, 2018.

  1. okeloon

    okeloon Member

    Joined:
    Oct 27, 2015
    Messages:
    153
    Likes Received:
    27
    I’m contemplating a uk track day. Standard RR6 with slip on Akra. Not sure how many dB but it is loud. Anyone know what noise restrictions might apply to my bike?
     
  2. Muffking

    Muffking Elite Member

    Joined:
    Jun 30, 2012
    Messages:
    3,745
    Likes Received:
    1,435
    The noise restriction will be set for the track, although some tracks have noisy days where the limits are higher. These will be the same for any bike, just applied at different revs.
    Are you able to ride yours there in advance to be measured?
     
    • Agree Agree x 1
  3. okeloon

    okeloon Member

    Joined:
    Oct 27, 2015
    Messages:
    153
    Likes Received:
    27
    Hi not going to be able go in advance, might see if anyone over here has a dB meter I can use
     
  4. hitch

    hitch New Member

    Joined:
    Jan 27, 2017
    Messages:
    462
    Likes Received:
    147
    Amazon have some cheap db meters.

    How do they test the noise? ...I mean practically shoving the meter at the end of the exhaust or holding it a certain distance from the side/rear of the bike?
     
    • Like Like x 1
  5. nigelrb

    nigelrb Active Member

    Joined:
    Nov 2, 2017
    Messages:
    2,160
    Likes Received:
    700
    It should be on the instructions in the kit.

    An emissions analyser goes into the exhaust, but decibels are generally read at a distance of about 1 metre at nominated revs (often around 3,000)
     
    • Agree Agree x 1
    • Useful Useful x 1
  6. Blade048

    Blade048 Active Member

    Joined:
    Jan 18, 2015
    Messages:
    484
    Likes Received:
    116
    I have an akra slip-on on my 06 and at the 5500rpm noise test makes 98db (without baffle).
     
    #6 Blade048, Feb 1, 2018
    Last edited: Feb 1, 2018
    • Useful Useful x 1
  7. hitch

    hitch New Member

    Joined:
    Jan 27, 2017
    Messages:
    462
    Likes Received:
    147
    I might get one of thos emeters off ebay and see what the result is with my Racefit :confused:
     
  8. PauloHRC

    PauloHRC Member

    Joined:
    Sep 3, 2017
    Messages:
    679
    Likes Received:
    300
    I've got a racefit growler 2 and I'm pretty certain it won't pass track day noise limits which is 102db (at Oulton).

    I got a db reader app and measured it with that in a similar way they do at track days. I know it might not be 100% accurate but I'm sure it's close. With the baffle in its below noise limits but I'm still worried so I've wrapped the baffle (the part that is hidden inside the exhaust) in a little exhaust packing and secured it with 4 stainless steel cable ties. Works a treat, bit daft I know buying a racefit and then dampening it down but needs must! ! o_O
     
    • Like Like x 3
  9. nigelrb

    nigelrb Active Member

    Joined:
    Nov 2, 2017
    Messages:
    2,160
    Likes Received:
    700
    Wow! Brilliant idea. I've never heard of it - well, it's not in Pensioner's Weekly. I hope Hitch sees your post to save him the cost of buying from eBay.;)
     
    • Like Like x 1
    • Agree Agree x 1
  10. PauloHRC

    PauloHRC Member

    Joined:
    Sep 3, 2017
    Messages:
    679
    Likes Received:
    300
    The app is just something I got off the app store.

    Here is a pic of the exhaust wadding I got and an example of what I did with the baffle. (It's not my actual baffle) ;)
     

    Attached Files:

    • Useful Useful x 3
  11. hitch

    hitch New Member

    Joined:
    Jan 27, 2017
    Messages:
    462
    Likes Received:
    147
    Great idea PauloHRC - thanks for sharing.
     
    • Like Like x 1
  12. sinewave

    sinewave God Like

    Joined:
    Jan 12, 2013
    Messages:
    8,118
    Likes Received:
    4,595
    I certainly wouldn't rely on an App on ya phone!

    A phones microphone is not designed for 100db + noise testing in the slightest! :rolleyes:

    OP, just make sure you have a baffle for your exhaust, it'll be an expensive day out 4 U if your Bike fails and there's no refunds either!

    1000cc Bikes are tested at 5500rpm and at 1m from end of ya Zorst.

    Other capacities have diff Rev limits but all measured at 1m.
     
    • Thanks Thanks x 1
    • Useful Useful x 1
  13. nigelrb

    nigelrb Active Member

    Joined:
    Nov 2, 2017
    Messages:
    2,160
    Likes Received:
    700
    Fair enough, but OP already acknowledged that it's not 100% accurate but merely a starting point.
     
    • Agree Agree x 1
  14. PauloHRC

    PauloHRC Member

    Joined:
    Sep 3, 2017
    Messages:
    679
    Likes Received:
    300
    So what else are 'ya' supposed to do if you're in 'ya' back garden and are curious how loud your exhaust is??

    And yes we all know it won't be 100% accurate as stated in previous post, but the db reader I have reads up too 120 db and even if it's plus or minus 5 db's, it will give you some idea of a ball park figure.:confused:

    Don't think I said I was reliant on it either......or I wouldn't have adapted my baffle! ;)
     
  15. And7rp2

    And7rp2 Elite Member

    Joined:
    Apr 11, 2011
    Messages:
    1,018
    Likes Received:
    1,074
    the firebloke has an rr4 with full akra system and it blows 98db , was the same on our rr4 too.
     
  16. TrackdayCharlie

    TrackdayCharlie New Member

    Joined:
    Mar 6, 2018
    Messages:
    47
    Likes Received:
    6
    I recon you'd be fine, and I have plenty of experience, not just hearsay. The only places I've experienced people struggling is Snetterton and Donny has some drive by's that can be a ballache, this is of the tracks I know well. Save your money on the decibel-o-meter and get yourself a baffle. Most tracks you won't need it, but if you do have it in you shouldn't fail anywhere with an Akra.

    I have a full Akra system, Carbon, no cat etc.
     
    • Like Like x 2
  17. PauloHRC

    PauloHRC Member

    Joined:
    Sep 3, 2017
    Messages:
    679
    Likes Received:
    300
    Well........rode up to Oulton Park today to watch a few sessions of the No Limits track that was going on there and to get my exhaust (racefit with baffle) noise tested.......I can confirm that it failed miserably haha! :D

    109 db at 5500 revs and the limit is 102 db.:eek: Will be sticking the stock exhaust back on when I go for real in May! :(

    Tell you what though I was itching to get on the track......especially when I was at the end of pit lane during the test, I was very tempted but I was wearing my bobble hat at the time!! o_O
     
    • Funny Funny x 1
  18. hitch

    hitch New Member

    Joined:
    Jan 27, 2017
    Messages:
    462
    Likes Received:
    147
    Ahh feck it - LOL
    I was gonna try that baffle + wadding out.

    Never mind, the exhaust swap is fairly quick to sort out and you'll be guaranteed of being within limits.
     
    • Agree Agree x 1

Share This Page