mad-butcher
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| posted on 8/9/05 at 06:51 PM |
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probably nothing to worry about
booked my mk blade in for a trackday at aintree. the only thing i am worried about is the noise limit.. i'm running one of martins silencers has
anyone had a problem over the noise limit using one... probably worrying about nothing.
tony
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Hellfire
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| posted on 8/9/05 at 10:05 PM |
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If the track limit is 105Db at 5m you may just make it... they typically emit 107Db it depends who's measuring and where.
[Edited on 8-9-05 by Hellfire]
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scotlad
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| posted on 8/9/05 at 11:02 PM |
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mine was nearly 105dB at sva- och you'll be fine
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Hellfire
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| posted on 9/9/05 at 06:42 AM |
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quote:
Originally posted by scotlad
mine was nearly 105dB at sva- och you'll be fine
Crikey the wanderer returns! What do you mean "was"?  Hope everything is well Graham. 
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scotlad
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| posted on 9/9/05 at 11:43 AM |
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yeah fine thanks i'll be down in your neck o the woods in a few saturdays time hopefully to pick up a new engine cradle for my injected
engine- so i'll be lookin for a run in your 'super hellfire' its comin up to stripdown time again for mineah the long cold
winter months- only good thing about winter is tinkerin wi the indy!
o yeah and my nice carbon race can is going on shortly so mine def will not be acceptable at track days dan sarf- got one at knockhill next friday
but lucky for us its out in the middle of nowhere so nobody gives a sh1t how loud the noise is!
A big thanku to yourself and the lads at MK for finding me the cam tensioner- the engine sounds loverly once more! i'm definately gonna keep it
for a future project- its just a fab engine!
[Edited on 9/9/05 by scotlad]
[Edited on 9/9/05 by scotlad]
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Lightning
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| posted on 9/9/05 at 12:10 PM |
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Replaced my MK can with a 6" dia 600mm long plus a Merlin motorspot muffler to get under 100DB @45degree 0.5m. I also put a fire blanket
temporarily over the engine for the test as much of the noise came from engine noise not exhaust.
Good luck
Steve
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shortie
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| posted on 9/9/05 at 03:54 PM |
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Mine was 104.8db at SVA! Completely standard MK manifold and can, I'd say you need some form of silencing!
Rich.
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VinceGledhill
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| posted on 9/9/05 at 06:37 PM |
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And remember for every 3 decibells then it's twice as loud.
In other words 103dB is twice as loud as 100dB and 106dB is twice as loud as 103dB.
Regards
Vince Gledhill
Time Served Auto Electrician
Lucas Leeds 1979-1983
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smart51
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| posted on 9/9/05 at 08:10 PM |
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quote:
Originally posted by VinceGledhill
And remember for every 3 decibells then it's twice as loud.
In other words 103dB is twice as loud as 100dB and 106dB is twice as loud as 103dB.
Not so! 3dB = twice the power but not twice the volume. The human ear is non-linear and it is more or less the case that 10dB = twice the volume.
Of course the ear isn't even non-linear non-linearly and at low volumes the 10dB rule doesn't hold true.
Sorry Vince.
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