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probably nothing to worry about
mad-butcher - 8/9/05 at 06:51 PM

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

Hellfire - 8/9/05 at 10:05 PM

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]

scotlad - 8/9/05 at 11:02 PM

mine was nearly 105dB at sva- och you'll be fine

Hellfire - 9/9/05 at 06:42 AM

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.

scotlad - 9/9/05 at 11:43 AM

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]

Lightning - 9/9/05 at 12:10 PM

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

shortie - 9/9/05 at 03:54 PM

Mine was 104.8db at SVA! Completely standard MK manifold and can, I'd say you need some form of silencing!

Rich.

VinceGledhill - 9/9/05 at 06:37 PM

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.

smart51 - 9/9/05 at 08:10 PM

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.