Sound DB levels (race track BAN)

badrich · #1 (**permalink**) 03-24-2010, 03:22 PM

I started out with a mild 390 with stock (burned out) glasspacks and it was kinda loud and raspy. When I went with my nasty big block it got to be *real* loud and raspy. My next door neighbor looked at me like she was going to hurt me when I wasn't looking.

Reluctantly I changed over to 24" Race LoBaks and those funny little cones. A little quieter and less raspy. That's as good as it gets. I still use my ear plugs, but if I forget them on a short trip for breakfast, my ears aren't ringing when I get there.

I plan on running the autocross at Sears Point for SAAC 35, but will be real hurt if I get black flagged. I *might* consider the track, but am afraid my beast is faster than I am. We'll see. Rich

computerworks · #2 (**permalink**) 03-24-2010, 05:55 PM

Quote:

Originally Posted by badrich

I plan on running the autocross at Sears Point for SAAC 35, but will be real hurt if I get black flagged. I *might* consider the track, but am afraid my beast is faster than I am. We'll see. Rich

Rich...it looks like Autocross will not be on the SAAC-35 schedule, so start thinking about the Track.

The full schedule and agenda for SAAC-35 should be released by this weekend.

computerworks · #3 (**permalink**) 03-24-2010, 05:58 PM

Ernie..

Infineon (Sears Point) (SAAC-35) has a 103db limit on weekends, with special exceptions for certain big events.

It looks like SAAC is planning 3 open track days (Fr-Sa-Su)... Friday is NOT a weekend day, so you will be permitted to run unmuffled on that day.

There is a strong possibility that we will get a waiver for Saturday as well...so keep that in mind when it comes time to register for an OT slot.

Cobra #3170 · #4 (**permalink**) 03-25-2010, 01:44 PM

Ron,

Thanks for the tip on exhaust, I'll just leave my stainless specialties mufflers on and run as is on Friday. I also agree with badrich, an Autox is a good way to get the cobwebs out without hurting the car. It would undoubtedly improve on track safety for those who participate in both.

Quote:

Originally Posted by computerworks

Ernie..

Infineon (Sears Point) (SAAC-35) has a 103db limit on weekends, with special exceptions for certain big events.

It looks like SAAC is planning 3 open track days (Fr-Sa-Su)... Friday is NOT a weekend day, so you will be permitted to run unmuffled on that day.

There is a strong possibility that we will get a waiver for Saturday as well...so keep that in mind when it comes time to register for an OT slot.

RodKnock · #5 (**permalink**) 03-25-2010, 02:01 PM

Gosh, I hope they don't have any sound limits as I roll into my parking spot.

Rare Iron · #6 (**permalink**) 03-25-2010, 05:07 PM

Actually, LOTS of race tracks all over (including drag strips) now have sound restrictions. Personally, I think this is 100% ridiculous since almost all of these tracks were there before any residential building began around them, so I agree with the "airport" scenario completely. Don't like the noise? Don't buy a home there!

Making something really quiet means killing the exhaust flow. You can take a nice chunk of dBA's off without losing HP by using a muffler that absorbs the sound. If you stick something in the flowpath of a Cobra sidepipe exhaust, you are really going to lose a lot of flow. Making a 600 HP motor lose 15 dBA is no easy trick. If you do it, you'll lose a LOT of HP.