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 Post subject: New sound DBa at Sonoma
PostPosted: Tue Jan 14, 2014 1:49 pm 
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I was wondering what the old DBa were and if I need to be worried? Since I do not know what my car did before. Also if I signup for an event and am to loud can I get credit for future event? Or is there somewhere somehow to test?


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PostPosted: Wed Jan 15, 2014 7:50 am 
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I believe it used to 103 db, maybe it was 105
It you fail the test, you have to make it quieter or your done for the day. No refunds.
Laguna Seca was 95db for a long time but now is 90 for most events, some stock cars might not pass that :roll:
But NASA in July is 105 db :D


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PostPosted: Thu Jan 16, 2014 5:31 pm 
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Confused. Are you saying the Sonoma sound limit has changed? If so, to what? Where did this info come from?

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NASA Norcal GTS3 e36 #0


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PostPosted: Thu Jan 16, 2014 5:37 pm 
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nm, google found it:

http://www.nasaproracing.com/event/1772

Quote:
New Sound Limit:

There is a STRICT sound limit of 101 dBA measured 50’ from the line on driver’s right, apex of T12. Attempts to fool the meter or lift will easily be detected by the track’s dedicated sound person (they hate that!). So, please prepare to adjust your muffling system if necessary. Any car over 101 will be given one chance to fix it. Over 103 and you will be excluded from the remainder of the event.

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Andrew Morton
NASA Norcal GTS3 e36 #0


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PostPosted: Thu Jan 23, 2014 5:13 pm 
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Yes, it changed from 103 to 101. Most cars come in at 90-something, and the really loud ones in the low 100's. I've watched the sound meter at Sonoma during various race groups and there will definitely be multiple cars that come close to or exceed that 101db level, but those are really loud track only cars -- not a concern for most street cars.

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PostPosted: Tue Feb 11, 2014 7:47 am 
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We will have a Sound Test Date on March 14th from 4:10-5pm. 1 pass by the meter then parade lap to pit. If you would like to register for this please e-mail scott@nasacarcontrol.org include your member number, car info and in the subject line "Sonoma Sound Test".

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