3 ms·
At all major Bay Area raceways a noise limit is published, and exhaust limits are either stated or implied (i.e. limiting to 90dB requires a muffler). Sonoma R
by altairprime 2y ago
At all major Bay Area raceways a noise limit is published, and exhaust limits are either stated or implied (i.e. limiting to 90dB requires a muffler).
Sonoma Raceways - 103dB at 50ft.
Thunderhill Raceways - 103dB, mufflers required.
Laguna Seca - 90dB, with rare exceptions.
Antioch - 95dB at 100ft.
Ocean Speedway - 90dB at 100ft.
Petaluma Speedway - 95dB at 100ft, mufflers required.
Stockton 99 Speedway - 95dB, "exhaust must be turned down or out".
Measurement techniques vary; Laguna Seca is especially hostile to noise to the point that some stock exhaust systems do not comply from factory (i.e. Subaru WRX STi); Stockton 99 buries the limit deep in the fine print viewed by racers; Nascar is difficult to host as their cars can reach 130dB; enforcement may be more or less strict; it's possible there are smaller local tracks I don't personally know about that aren't listed here (I'm more familiar with North than East or South, for example).
- ziddoap 2y agoThanks for the extra information! I didn't realize it was that strict in that area. I stand corrected. I actually went and re-read the rules for the three tracks I most commonly go to (just in case I was mistaken/misremembering), however there are no noise provisions at all. >some stock exhaust systems do not comply from factory (i.e. Subaru WRX STi); Yikes! They definitely wouldn't like my WRX STI.
- altairprime 2y agoSure thing. I would expect this is not the case nationwide :) There's some factory Porsche setups that also cross the 90dB threshold. You could look up automated noise enforcement trials in NYC for some really upset people who found out that their factory-stock cars are illegally loud. I haven't seen anything serious stem from that yet, but I personally cannot wait for enforcement here at home just to put a stop to all the racing exhausts on the streets around here!