DanDud Posted July 31, 2015 Share Posted July 31, 2015 the answer is to stick a socket up the exhaust (and use some method to stop it falling out)..... Quote Link to comment Share on other sites More sharing options...
Stu Faulkner Posted August 1, 2015 Share Posted August 1, 2015 I believe they are supposed to give you an extra one db for atmospheric conditions and an extra one for meter inconsistency. Two db doesn't sound like a lot ( no pun ) but it makes a difference. I think anyone who has done a track day/race has had huge variations with the sound guy. Quote Link to comment Share on other sites More sharing options...
Man On The Clapham Omnibus Posted August 1, 2015 Share Posted August 1, 2015 It is a logarithmic scale and 3dB is a doubling of sound level, and 10dB a tenfold increase as I understand it, so 2dB is quite a lot. Mine scrapes through at 99dB(A) most times with occasional figures as low as 97dB(A). It is a black art and very dependent on local conditions, operator foibles, and engine/silencer temperature. I have learned to always warm the car up beforehand, and to slowly bring the revs up so as not to overshoot. My Wunoff box has a loose component which resonates at about 3,750rpm so I try to get through that as quickly as I can. Quote Link to comment Share on other sites More sharing options...
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