Current Sound Rules

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01badz28
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Current Sound Rules

Post by 01badz28 » Wed Jul 26, 2017 8:53 am

Anyone who heard my car last weekend knows I have a bad exhaust rattle. After checking the whole system out, I believe its internal to the muffler as I can't find any loose hangers / pipe. What sound policy is currently in effect post PSTCC? The website still shows a 96 db requirement, but the national solo rules show a 100 db limit. I don't remember even seeing the sound meter set up at Smokies this weekend. I sort of remember our more restrictive 96 db was to satisfy the PSTCC folks.

Anyway, I'm not wanting to debate what the rule should be I just want to know what is in effect so I can comply with the rule. If its 100 db I'll throw a Loudmouth on the car and call it a day. If its 96db, I need to do some research because the quiet high flowing off the shelf options that existed 5-10 years ago have been discontinued.
Ryan E. Jarrard
2001 Camaro Z28, SM #24
2006 BMW Z4 3.0si
1989 BMW M3

jcox07
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Re: Current Sound Rules

Post by jcox07 » Wed Jul 26, 2017 9:17 am

We are running the 100 db limit.
JY ( Jeff ) Cox

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01badz28
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Re: Current Sound Rules

Post by 01badz28 » Wed Jul 26, 2017 12:14 pm

Thanks.
Ryan E. Jarrard
2001 Camaro Z28, SM #24
2006 BMW Z4 3.0si
1989 BMW M3

MARKP
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Re: Current Sound Rules

Post by MARKP » Wed Jul 26, 2017 9:13 pm

I don't think the loudmouth will meet sound on your car. Mine is still running the cast manifolds and the cat and I ended up right at 96-97db when Mike and I ran some tests.

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Mark Pilson
East TN Region RE
2005 and 2016 ETR Pro Class Champion (you know, the class that doesn't exist in the SCCA rulebook)

thrdeye
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Re: Current Sound Rules

Post by thrdeye » Wed Jul 26, 2017 9:56 pm

100 ok at adesa?

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Chris Harp
2016 Mazda MX5 - PCS 194

MARKP
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Re: Current Sound Rules

Post by MARKP » Wed Jul 26, 2017 11:11 pm

I don't know why not. There isn't much around there.

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Mark Pilson
East TN Region RE
2005 and 2016 ETR Pro Class Champion (you know, the class that doesn't exist in the SCCA rulebook)

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01badz28
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Location: Knoxville, TN

Re: Current Sound Rules

Post by 01badz28 » Thu Jul 27, 2017 3:13 pm

MARKP wrote:
Wed Jul 26, 2017 9:13 pm
I don't think the loudmouth will meet sound on your car. Mine is still running the cast manifolds and the cat and I ended up right at 96-97db when Mike and I ran some tests.

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They upgraded the LM. Now you can get it without any muffler. Its literally just a straight pipe. Might as well go with a NASCAR side exhaust at that point. :rockon:
Ryan E. Jarrard
2001 Camaro Z28, SM #24
2006 BMW Z4 3.0si
1989 BMW M3

MARKP
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Joined: Sat Dec 06, 2003 3:51 pm
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Re: Current Sound Rules

Post by MARKP » Thu Jul 27, 2017 3:33 pm

Lol... mine has a resonator that is about 12" long.

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Mark Pilson
East TN Region RE
2005 and 2016 ETR Pro Class Champion (you know, the class that doesn't exist in the SCCA rulebook)

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01badz28
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Re: Current Sound Rules

Post by 01badz28 » Thu Jul 27, 2017 3:44 pm

MARKP wrote:
Thu Jul 27, 2017 3:33 pm
Lol... mine has a resonator that is about 12" long.

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Yeah, they got rid of the resonator. You know anything about the SLP Powerflo that replaced the Dual / dual? I don't know anyone that has it.
Ryan E. Jarrard
2001 Camaro Z28, SM #24
2006 BMW Z4 3.0si
1989 BMW M3

MARKP
Posts: 8526
Joined: Sat Dec 06, 2003 3:51 pm
Location: Farragut, TN

Re: Current Sound Rules

Post by MARKP » Thu Jul 27, 2017 6:02 pm

Nope. It has to be quieter than the Loudmouth, though. Lol

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Mark Pilson
East TN Region RE
2005 and 2016 ETR Pro Class Champion (you know, the class that doesn't exist in the SCCA rulebook)

jcox07
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Re: Current Sound Rules

Post by jcox07 » Fri Jul 28, 2017 5:02 am

Just get a dynomax muffler and it will be good.
JY ( Jeff ) Cox

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