Sonoma Raceway Noise Limit

HapaZ

I'm doing my first HPDE at Sonoma in November and there's a 103db sound limit. With Z1 headers, Berk HFC's, and an Invidia cat-back what are the chances I'll get flagged for being too loud? I have the headers sitting in a box in my trunk and I'm considering adding them after the track day, just to be safe. I figured I'd ask the more experienced among us before deciding.

danegrey

well wish I was allow 103db. It all depends, at Atlanta Motorsport Park limited to 98db, I have z1 headers / z1 test pipes resonated / FI exhaust with 18' mufflers resonated. Never got flagged. (Note this is at 50 feet from track)

So it might come down are the BerK HFC and Invidia cat-bat at all resonated. I had my built that way, because I new sound limits are in affect.

Just my 2 cents on what I have done. Another thought, its a bit cheaper, does Sonoma do any SCCA Track nights, the reason I ask, its 130-155 to run, might be a cheap experiment to see if you get bounced....

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HapaZ

The berk/invidia setup isn’t known for being obnoxiously loud and I think I’d pass with my current setup. It’s the headers I’m worried about for the most part.

2011 Nismo#91

You should be fine. Pretty much any sort of muffler should get you under that limit. Z1 headers won't make a difference for sound over stock headers. Long tube headers that delete the cats will increase the loudness of the exhaust a bit.

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