Sonoma Raceway Sound Limit

[slicer]

Guys - I'm registered for a speed ventures event at Sonoma Raceway. The sound limit is 103db. I'm curious if anyone has had any issues there. I'm running an Akrapovic GT4 system which is straight pipes to the muffler. I have no idea what my sound level is. Any tips would be appreciated. Thank You

[roastbeef]

i didn't realize they had a limit... i'm interested in hearing experiences as well. i'll be there in november for a week (laguna one weekend, sonoma the next), so i'll have my oem rear section on. shouldn't be a problem, but i have the afe xpipe now...
anyone know what method they use? sound booth?

[okusa]

I'm running Akra X with no muffler, just resonator and I'm at about 98. You'll be fine.

[dogbone]

I believe the Sonoma sound check is from 100 feet away, compared to Laguna where it is 50 feet away. That extra distance really helps.

I don't go to Sonoma that often, but I have never heard of anyone having a noise limit problem there.

[slicer]

Originally Posted by dogbone

I believe the Sonoma sound check is from 100 feet away, compared to Laguna where it is 50 feet away. That extra distance really helps.

I don't go to Sonoma that often, but I have never heard of anyone having a noise limit problem there.

Originally Posted by okusa

I'm running Akra X with no muffler, just resonator and I'm at about 98. You'll be fine.

Excellent. Thank you

[dogbone]

Originally Posted by roastbeef

i didn't realize they had a limit... i'm interested in hearing experiences as well. i'll be there in november for a week (laguna one weekend, sonoma the next), so i'll have my oem rear section on. shouldn't be a problem, but i have the afe xpipe now...
anyone know what method they use? sound booth?

The first time I visited Sonoma, I wondered about their sound policy. I was told that I could visit the person monitoring sound and ask questions. She was all the way at the top of the grand stands in one of the suites. It's quite a stair climb to get up there. I believe the microphone was somewhere down in the area of Turn 11. Anyway, she was really nice and just sat there all day monitoring what was going on below. She told me she would write down my noise levels, and to come back the next day. When I went the next day, she laughed that my car was really quiet. I think it was in the low 80's with the stock exhaust.

I sat in the grand stands watching a dual race of Spec E30 and Miatas. (They start the two groups on opposite sides of the track at the same time.) Those Miatas were the loudest damn fart cans. They howled as they went by the grand stands. I didn't hear of anyone having any noise problems.

They test full-on crazy race cars at Sonoma pretty regularly. I've watched them go by. They ain't quiet at all.

[hayes180]

So Sound booth at Sonoma is at Turn 7 or 11 (can't recall) where you are downshifting, unlike MRLS where you are screaming uphill in 3rd gear.

I run a Bimmerworld race catback with a catless mid pipe and have not blown sound at Sonoma. You'll be fine.

[slicer]

Originally Posted by hayes180

So Sound booth at Sonoma is at Turn 7 or 11 (can't recall) where you are downshifting, unlike MRLS where you are screaming uphill in 3rd gear.

I run a Bimmerworld race catback with a catless mid pipe and have not blown sound at Sonoma. You'll be fine.

Great to know. Thank you for the info.